Document:

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                                                                    Exhibit 4.16

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                                   INDENTURE

                         Dated as of December 12, 2000

                                     Among

                  AMERISOURCE HEALTH CORPORATION, as Issuer,

                    AMERISOURCE CORPORATION, as Guarantor,

                                      and

                   BANK ONE TRUST COMPANY, N.A., as Trustee

                              ___________________

            5% Convertible Subordinated Notes due December 1, 2007

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                               TABLE OF CONTENTS

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                                   ARTICLE I

            DEFINITIONS AND OTHER PROVISIONS OF GENERAL APPLICATION

SECTION 1.1    Definitions......................................................................      1
SECTION 1.2    Compliance Certificates and Opinions.............................................     14
SECTION 1.3    Form of Documents Delivered to the Trustee.......................................     14
SECTION 1.4    Acts of Holders of Securities....................................................     15
SECTION 1.5    Notices, Etc., to the Trustee and Company........................................     17
SECTION 1.6    Notice to Holders of Securities; Waiver..........................................     18
SECTION 1.7    Effect of Headings and Table of Contents.........................................     18
SECTION 1.8    Successors and Assigns...........................................................     18
SECTION 1.9    Separability Clause..............................................................     19
SECTION 1.10   Benefits of Indenture............................................................     19
SECTION 1.11   Governing Law....................................................................     19
SECTION 1.12   Legal Holidays...................................................................     19
SECTION 1.13   Conflict with Trust Indenture Act................................................     20

                                  ARTICLE II

                                SECURITY FORMS

SECTION 2.1    Form Generally...................................................................     20
SECTION 2.2    Form of Security with Guarantee..................................................     21
SECTION 2.3    Form of Certificate of Authentication............................................     38
SECTION 2.4    Form of Conversion Notice........................................................     38
SECTION 2.5    Form of Assignment...............................................................     39

                                  ARTICLE III

                                THE SECURITIES

SECTION 3.1    Title and Terms..................................................................     41
SECTION 3.2    Denominations....................................................................     42
SECTION 3.3    Execution, Authentication, Delivery and Dating...................................     42
SECTION 3.4    Global Securities; Non-global Securities; Book-entry Provisions..................     43
SECTION 3.5    Registration; Registration of Transfer and Exchange; Restrictions on Transfer....     44
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SECTION 3.6    Mutilated, Destroyed, Lost or Stolen Securities..................................    48
SECTION 3.7    Payment of Interest; Interest Rights Preserved...................................    49
SECTION 3.8    Persons Deemed Owners............................................................    50
SECTION 3.9    Cancellation.....................................................................    51
SECTION 3.10   Computation of Interest..........................................................    51
SECTION 3.11   CUSIP Numbers....................................................................    51

                                               ARTICLE IV

                                        SATISFACTION AND DISCHARGE

SECTION 4.1    Satisfaction and Discharge of Indenture..........................................    51
SECTION 4.2    Application of Trust Money.......................................................    53

                                                ARTICLE V

                                                 REMEDIES

SECTION 5.1    Events of Default................................................................    53
SECTION 5.2    Acceleration of Maturity; Rescission and Annulment...............................    55
SECTION 5.3    Collection of Indebtedness and Suits for Enforcement by Trustee..................    56
SECTION 5.4    Trustee May File Proofs of Claim.................................................    57
SECTION 5.5    Trustee May Enforce Claims Without Possession of Securities......................    58
SECTION 5.6    Application of Money Collected...................................................    58
SECTION 5.7    Limitation on Suits..............................................................    59
SECTION 5.8    Unconditional Right of Holders to Receive Principal, Premium and Interest and to
                  Convert.......................................................................    60
SECTION 5.9    Restoration of Rights and Remedies...............................................    60
SECTION 5.10   Rights and Remedies Cumulative...................................................    60
SECTION 5.11   Delay or Omission Not Waiver.....................................................    60
SECTION 5.12   Control by Holders of Securities.................................................    61
SECTION 5.13   Waiver of Past Defaults..........................................................    61
SECTION 5.14   Undertaking for Costs............................................................    61
SECTION 5.15   Waiver of Stay, Usury or Extension Laws..........................................    62

                                                ARTICLE VI

                                                THE TRUSTEE

SECTION 6.1    Certain Duties and Responsibilities..............................................    62
SECTION 6.2    Notice of Defaults...............................................................    63
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SECTION 6.3    Certain Rights of Trustee........................................................  64
SECTION 6.4    Not Responsible for Recitals or Issuance of Securities...........................  65
SECTION 6.5    May Hold Securities, Act as Trustee Under Other Indentures.......................  65
SECTION 6.6    Money Held in Trust..............................................................  65
SECTION 6.7    Compensation and Reimbursement...................................................  66
SECTION 6.8    Corporate Trustee Required; Eligibility..........................................  66
SECTION 6.9    Resignation and Removal; Appointment of Successor................................  67
SECTION 6.10   Acceptance of Appointment by Successor...........................................  68
SECTION 6.11   Merger, Conversion, Consolidation or Succession to Business......................  69
SECTION 6.12   Authenticating Agents............................................................  69
SECTION 6.13   Disqualification; Conflicting Interests..........................................  70
SECTION 6.14   Preferential Collection of Claims Against Company................................  71

                                         ARTICLE VII

                      CONSOLIDATION, MERGER, CONVEYANCE, TRANSFER OR LEASE

SECTION 7.1    Company May Consolidate, Etc., Only on Certain Terms.............................  71
SECTION 7.2    Successor Substituted............................................................  72

                                         ARTICLE VIII

                                     SUPPLEMENTAL INDENTURES

SECTION 8.1    Supplemental Indentures Without Consent of Holders of Securities.................  72
SECTION 8.2    Supplemental Indentures with Consent of Holders of Securities....................  73
SECTION 8.3    Execution of Supplemental Indentures.............................................  75
SECTION 8.4    Effect of Supplemental Indentures................................................  75
SECTION 8.5    Reference in Securities to Supplemental Indentures...............................  75
SECTION 8.6    Notice of Supplemental Indentures................................................  76

                                          ARTICLE IX

                                MEETINGS OF HOLDERS OF SECURITIES

SECTION 9.1    Purposes for Which Meetings May Be Called........................................  76
SECTION 9.2    Call, Notice and Place of Meetings...............................................  76
SECTION 9.3    Persons Entitled to Vote at Meetings.............................................  77
SECTION 9.4    Quorum; Action...................................................................  77
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SECTION 9.5     Determination of Voting Rights; Conduct and Adjournment of Meetings..............   78
SECTION 9.6     Counting Votes and Recording Action of Meetings..................................   78

                                            ARTICLE X

                                            COVENANTS

SECTION 10.1    Payment of Principal, Premium and Interest.......................................   79
SECTION 10.2    Maintenance of Offices or Agencies...............................................   79
SECTION 10.3    Money for Security Payments to Be Held in Trust..................................   80
SECTION 10.4    Existence........................................................................   81
SECTION 10.5    Maintenance of Properties........................................................   82
SECTION 10.6    Payment of Taxes and Other Claims................................................   82
SECTION 10.7    Registration and Listing.........................................................   82
SECTION 10.8    Statement by Officers as to Default..............................................   83
SECTION 10.9    Delivery of Certain Information..................................................   83
SECTION 10.10   Intentionally Omitted............................................................   84
SECTION 10.11   Registration Rights..............................................................   84
SECTION 10.12   Waiver of Certain Covenants......................................................   85

                                            ARTICLE XI

                                      REDEMPTION OF SECURITIES

SECTION 11.1    Right of Redemption..............................................................   85
SECTION 11.2    Applicability of Article.........................................................   85
SECTION 11.3    Election to Redeem; Notice to Trustee............................................   85
SECTION 11.4    Selection by Trustee of Securities to Be Redeemed................................   86
SECTION 11.5    Notice of Redemption.............................................................   86
SECTION 11.6    Deposit of Redemption Price......................................................   87
SECTION 11.7    Securities Payable on Redemption Date............................................   87
SECTION 11.8    Conversion Arrangement on Call for Redemption....................................   88

                                                ARTICLE XII

                                            CONVERSION OF SECURITIES

SECTION 12.1    Conversion Privilege and Conversion Rate.........................................   89
SECTION 12.2    Exercise of Conversion Privilege.................................................   90
SECTION 12.3    Fractions of Shares..............................................................   92
SECTION 12.4    Adjustment of Conversion Rate....................................................   92
SECTION 12.5    Notice of Adjustments of Conversion Rate.........................................   97
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SECTION 12.6    Notice of Certain Corporate Action..........................................................   98
SECTION 12.7    Company to Reserve Common Stock.............................................................   99
SECTION 12.8    Taxes on Conversions........................................................................   99
SECTION 12.9    Covenant as to Common Stock.................................................................   99
SECTION 12.10   Cancellation of Converted Securities........................................................  100
SECTION 12.11   Provision in Case of Consolidation, Merger or Sale of Assets................................  100
SECTION 12.12   Rights Issued in Respect of Common Stock....................................................  101
SECTION 12.13   Responsibility of Trustee for Conversion Provisions.........................................  101

                                                 ARTICLE XIII

                                            SUBORDINATION OF SECURITIES

SECTION 13.1    Securities Subordinate to Senior Debt.......................................................  102
SECTION 13.2    No Payment in Certain Circumstances, Payment Over of Proceeds upon Dissolution, Etc.........  102
SECTION 13.3    Prior Payment to Senior Debt upon Acceleration of Securities................................  105
SECTION 13.4    Payment Permitted if No Default.............................................................  105
SECTION 13.5    Subrogation to Rights of Holders of Senior Debt.............................................  105
SECTION 13.6    Provisions Solely to Define Relative Rights.................................................  106
SECTION 13.7    Trustee to Effectuate Subordination.........................................................  106
SECTION 13.8    No Waiver of Subordination Provisions.......................................................  106
SECTION 13.9    Notice to Trustee...........................................................................  107
SECTION 13.10   Reliance on Judicial Order or Certificate of Liquidation Agent..............................  108
SECTION 13.11   Trustee Not Fiduciary for Holders of Senior Debt............................................  108
SECTION 13.12   Reliance by Holders of Senior Debt on Subordination Provisions..............................  108
SECTION 13.13   Rights of Trustee as Holder of Senior Debt; Preservation of Trustee's Rights................  109
SECTION 13.14   Article Applicable to Paying Agents.........................................................  109
SECTION 13.15   Certain Conversions and Repurchases Deemed Payment..........................................  109

                                                     ARTICLE XIV

                                                 GUARANTEE OF SECURITIES

SECTION 14.1    Unconditional Guarantee.....................................................................  110
SECTION 14.2    Subordination of Guarantee..................................................................  111
SECTION 14.3    Severability................................................................................  111
SECTION 14.4    Release of the Subsidiary Guarantor.........................................................  111
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SECTION 14.5    Limitation of Subsidiary Guarantor's Liability...........................................     111
SECTION 14.6    Subsidiary Guarantor May Consolidate, Etc., on Certain Terms.............................     112
SECTION 14.7    Successor Substituted....................................................................     112
SECTION 14.8    Waiver of Subrogation....................................................................     113
SECTION 14.9    Execution of Guarantee...................................................................     113
SECTION 14.10   No Payment on Guarantee in Certain Circumstances.........................................     114
SECTION 14.11   Payment Over of Proceeds upon Dissolution, Etc...........................................     115
SECTION 14.12   Payments May Be Paid Prior to Dissolution................................................     117
SECTION 14.13   Subrogation..............................................................................     117
SECTION 14.14   Obligations of Subsidiary Guarantor Unconditional........................................     118
SECTION 14.15   Notice to Trustee........................................................................     118
SECTION 14.16   Reliance on Judicial Order or Certificate of Liquidating Agent...........................     119
SECTION 14.17   Trustee's Relation to Guarantor Senior Indebtedness......................................     119
SECTION 14.18   Subordination Rights Not Impaired by Acts or Omissions of the Subsidiary Guarantor or
                   Holders of Guarantor Senior Debt......................................................     119
SECTION 14.19   Noteholders Authorize Trustee to Effectuate Subordination of Guarantees..................     120
SECTION 14.20   This Article XIV Not to Prevent Events of Default........................................     121
SECTION 14.21   Trustee's Compensation Not Prejudiced....................................................     121

                                                    ARTICLE XV

                                  REPURCHASE OF SECURITIES AT THE OPTION OF THE
                                         HOLDER UPON A CHANGE IN CONTROL

SECTION 15.1    Right to Require Repurchase..............................................................     121
SECTION 15.2    Conditions to the Company's Election to Pay the Repurchase Price in Common Stock.........     122
SECTION 15.3    Notices; Method of Exercising Repurchase Right, Etc......................................     123
SECTION 15.4    Certain Definitions......................................................................     126
SECTION 15.5    Consolidation, Merger, Etc...............................................................     127

                                                   ARTICLE XVI

                         HOLDERS LISTS AND REPORTS BY TRUSTEE AND COMPANY; NON-RECOURSE

SECTION 16.1    Company to Furnish Trustee Names and Addresses of Holders................................     128
SECTION 16.2    Preservation of Information..............................................................     128
SECTION 16.3    Reports by Trustee.......................................................................     129
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SECTION 16.4    Reports by Company.......................................... 129

                                 ARTICLE XVII

        IMMUNITY OF INCORPORATORS, STOCKHOLDERS, OFFICERS AND DIRECTORS

SECTION 17.1    Indenture and Securities Solely Corporate Obligations....... 130
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          INDENTURE, dated as of December 12, 2000, among AMERISOURCE HEALTH
CORPORATION, a corporation duly organized and existing under the laws of the
State of Delaware (the "Company"), AMERISOURCE CORPORATION, a corporation duly
organized and existing under the laws of the State of Delaware, as guarantor
(the "Subsidiary Guarantor"), and BANK ONE TRUST COMPANY, N.A., a national
banking association organized under the laws of the United States, as Trustee
hereunder (the "Trustee").
                -------

                                    RECITALS

          The Company has duly authorized the creation of an issue of its 5%
Convertible Subordinated Notes due December 1, 2007 (the "Securities") of
substantially the tenor and amount hereinafter set forth, and to provide
therefor the Company has duly authorized the execution and delivery of this
Indenture.  The Subsidiary Guarantor has duly authorized the creation of its
guarantee hereunder (the "Guarantee") and has duly authorized the execution and
                          ---------
delivery of this Indenture.

          All things necessary to make the Securities, when the Securities are
executed by the Company and authenticated and delivered hereunder, the valid
obligations of the Company, and to make this Indenture a valid agreement of the
Company, in accordance with their and its terms, have been done.  Further, all
things necessary to duly authorize the issuance of the Common Stock of the
Company issuable upon the conversion of the Securities, and to duly reserve for
issuance the number of shares of Common Stock issuable upon such conversion,
have been done.

          NOW, THEREFORE, THIS INDENTURE WITNESSETH:

          For and in consideration of the premises and the purchase of the
Securities by the Holders thereof, it is mutually covenanted and agreed, for the
equal and proportionate benefit of all Holders of the Securities, as follows:

                                   ARTICLE I

            DEFINITIONS AND OTHER PROVISIONS OF GENERAL APPLICATION

SECTION 1.1    Definitions.
               -----------

          For all purposes of this Indenture, except as otherwise expressly
provided or unless the context otherwise requires:

          (1)  the terms defined in this Article have the meanings assigned to
     them in this Article and include the plural as well as the singular;
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                                      -2-

          (2)  all accounting terms not otherwise defined herein have the
     meanings assigned to them in accordance with generally accepted accounting
     principles in the United States, and, except as otherwise herein expressly
     provided, the term "generally accepted accounting principles" with respect
     to any computation required or permitted hereunder shall mean such
     accounting principles as are generally accepted at the date of such
     computation; and

          (3)  the words "herein", "hereof" and "hereunder" and other words of
     similar import refer to this Indenture as a whole and not to any particular
     Article, Section or other subdivision.

          "Act", when used with respect to any Holder of a Security, has the
meaning specified in Section 1.4.

          "Affiliate" of any specified Person means any other Person directly or
indirectly controlling or controlled by or under direct or indirect common
control with such specified Person.  For the purposes of this definition,
"control", when used with respect to any specified Person, means the power to
direct the management and policies of such Person, directly or indirectly,
whether through the ownership of voting securities, by contract or otherwise;
and the terms "controlling" and "controlled" have meanings correlative to the
foregoing.

          "Agent Member" means any member of, or participant in, the Depositary.

          "Applicable Procedures" means, with respect to any transfer or
transaction involving a Global Security or beneficial interest therein, the
rules and procedures of The Depository Trust Company, in each case to the extent
applicable to such transaction and as in effect from time to time.

          "Authenticating Agent" means any Person authorized pursuant to Section
6.12 to act on behalf of the Trustee to authenticate Securities.

          "Board of Directors" means either the board of directors of the
Company or any duly authorized committee of that board.

          "Board Resolution" means a resolution duly adopted by the Board of
Directors, a copy of which, certified by the Secretary or an Assistant Secretary
of the Company to have been duly adopted by the Board of Directors and to be in
full force and effect on the date of such certification, shall have been
delivered to the Trustee.

          "Business Day", when used with respect to any Place of Payment, Place
of Conversion or any other place, as the case may be, means each Monday,
Tuesday, Wednesday, Thursday and Friday which is not a day on which banking
institutions in such Place of Pay-
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                                      -3-

ment, Place of Conversion or other place, as the case may be, are authorized or
obligated by law or executive order to close; provided, however, that a day on
which banking institutions in New York, New York are authorized or obligated by
law or executive order to close shall not be a Business Day for purposes of
Section 13.9.

          "Change in Control" has the meaning specified in Section 15.4(2).

          "Closing Price Per Share" means, with respect to the Common Stock, for
any day, (i) the closing sale price on the New York Stock Exchange as reported
by The Wall Street Journal (or, if not reported thereby, any other authoritative
source) or (ii) if the Common Stock is not listed on the New York Stock Exchange
or quoted or admitted to trading on any national securities exchange, the
average of the closing bid prices in the over-the-counter market as furnished by
any New York Stock Exchange member firm selected from time to time by the
Company for that purpose.

          "Code" has the meaning specified in Section 2.1.

          "Commission" means the United States Securities and Exchange
Commission, as from time to time constituted, created under the Exchange Act,
or, if at any time after the execution of this instrument such Commission is not
existing and performing the duties now assigned to it under the Trust Indenture
Act, then the body performing such duties at such time.

          "common stock" includes any stock of any class of capital stock which
has no preference in respect of dividends or of amounts payable in the event of
any voluntary or involuntary liquidation, dissolution or winding up of the
issuer thereof and which is not subject to redemption by the issuer thereof.

          "Common Stock" means the Class A Common Stock, par value $0.01 per
share, of the Company authorized at the date of this instrument as originally
executed.  Subject to the provisions of Section 12.11, shares issuable on
conversion or repurchase of Securities shall include only shares of Common Stock
or shares of any class or classes of common stock resulting from any
reclassification or reclassifications thereof; provided, however, that if at any
time there shall be more than one such resulting class, the shares so issuable
on conversion of Securities shall include shares of all such classes, and the
shares of each such class then so issuable shall be substantially in the
proportion which the total number of shares of such class resulting from all
such reclassifications bears to the total number of shares of all such classes
resulting from all such reclassifications.

          "Company" means the Person named as the "Company" in the first
paragraph of this instrument until a successor Person shall have become such
pursuant to the applicable provisions of this Indenture, and thereafter
"Company" shall mean such successor Person.
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                                      -4-

          "Company Notice" has the meaning specified in Section 15.3.

          "Company Request" or "Company Order" means a written request or order
signed in the name of the Company by its (i) Chairman of the Board, its Vice
Chairman of the Board, its Chief Executive Officer, its President, its Chief
Operating Officer, a Senior Vice President or a Vice President, and by its (ii)
Chief Financial Officer, Treasurer, an Assistant Treasurer, its Secretary or an
Assistant Secretary, and delivered to the Trustee.

          "Constituent Person" has the meaning specified in Section 12.11.

          "Conversion Agent" means any Person authorized by the Company to
convert Securities in accordance with Article XII.  The Company has initially
appointed the Trustee as its Conversion Agent pursuant to Section 10.2 hereof.

          "Conversion Price" has the meaning specified in Section 15.4(3).

          "Conversion Rate" has the meaning specified in Section 12.1.

          "Corporate Trust Office" means the office of the Trustee at which at
any particular time the trust created by this Indenture shall be principally
administered (which at the date of this Indenture is located at 153 West 51st
Street, New York, NY 10019, Attention: Corporate Trust Administration
(AmeriSource Health Corporation, 5% Convertible Subordinated Notes due December
1, 2007)).

          "corporation" means a corporation, company, association, joint-stock
company or business trust.

          "Defaulted Interest" has the meaning specified in Section 3.7.

          "Depositary" means, with respect to any Securities (including any
Global Securities), a clearing agency that is registered as such under the
Exchange Act and is designated by the Company to act as Depositary for such
Securities (or any successor securities clearing agency so registered).

          "Designated Guarantor Senior Debt" means the Subsidiary Guarantor's
obligations under the Liquidity Credit Facility, the Receivables Securitization
Facility and the Revolving Credit Facility and under any other particular
Guarantor Senior Debt in which the instrument creating or evidencing the same or
the assumption or guarantee thereof (or related agreements or documents to which
the Subsidiary Guarantor is a party), whether or not executed contemporaneously
with the issuance of such Guarantor Senior Debt, expressly provides that such
Guarantor Senior Debt shall be "Designated Guarantor Senior Debt" for purposes
of this Indenture (provided that such instrument, agreement or other document
may place limita-
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                                      -5-

tions and conditions on the right of such Guarantor Senior Debt to exercise the
rights of Designated Guarantor Senior Debt).

          "Designated Senior Debt" means the Company's obligations under the
Liquidity Credit Facility, the Receivables Securitization Facility and the
Revolving Credit Facility and under any other particular Senior Debt in which
the instrument creating or evidencing the same or the assumption or guarantee
thereof (or related agreements or documents to which the Company is a party),
whether or not executed contemporaneously with the issuance of such Senior Debt
expressly provides that such Senior Debt shall be "Designated Senior Debt" for
purposes of this Indenture (provided that such instrument, agreement or other
document may place limitations and conditions on the right of such Senior Debt
to exercise the rights of Designated Senior Debt).

          "Distribution Date" shall mean the "Distribution Date" as such term is
defined in the Registration Rights Agreement.

          "Dollar" or "$" means a dollar or other equivalent unit in such coin
or currency of the United States as at the time shall be legal tender for the
payment of public and private debts.

          "DTC" means The Depository Trust Company, a New York corporation.

          "Event of Default" has the meaning specified in Section 5.1.

          "Exchange Act" means the United States Securities Exchange Act of 1934
(or any successor statute), as amended from time to time.

          "Global Security" means a Security that is registered in the Security
Register in the name of a Depositary or a nominee thereof.

          "Guarantee" has the meaning specified in Section 14.1.

          "Guarantor Blockage Period" has the meaning specified in Section
14.10.

          "Guarantor Default Notice" has the meaning specified in Section 14.10.

          "Guarantor Senior Debt" means the principal of (and premium, if any)
and interest (including all interest accruing subsequent to the commencement of
any bankruptcy or similar proceeding, whether or not a claim for post-petition
interest is allowable as a claim in any such proceeding) on, and all fees and
other amounts payable in connection with, the following, whether absolute or
contingent, secured or unsecured, due or to become due, outstanding on the date
of this Indenture or thereafter created, incurred or assumed:  (a) indebtedness
of the Subsidiary Guarantor evidenced by a credit or loan agreement, note, bond,
deben-
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                                      -6-

ture or other written obligation, including without limitation the Liquidity
Credit Facility and the Revolving Credit Facility, (b) all obligations of the
Subsidiary Guarantor for money borrowed and all obligations of the Subsidiary
Guarantor under the Receivables Securitization Facility, (c) all obligations of
the Subsidiary Guarantor evidenced by a note or similar instrument given in
connection with the acquisition of any businesses, properties or assets of any
kind, (d) obligations of the Subsidiary Guarantor (i) as lessee under leases
required to be capitalized on the balance sheet of the lessee under generally
accepted accounting principles or (ii) as lessee under other leases for
facilities, capital equipment or related assets, whether or not capitalized,
entered into or leased for financing purposes, (e) all obligations of the
Subsidiary Guarantor under interest rate and currency swaps, caps, floors,
collars, hedge agreements, forward contracts or similar agreements or
arrangements, (f) all obligations of the Subsidiary Guarantor with respect to
letters of credit, bankers' acceptances and similar facilities (including
reimbursement obligations with respect to the foregoing), (g) all obligations of
the Subsidiary Guarantor issued or assumed as the deferred purchase price of
property or services (but excluding trade accounts payable and accrued
liabilities arising in the ordinary course of business), (h) all obligations of
the type referred to in clauses (a) through (g) of this paragraph of another
Person and all dividends of another Person, the payment of which, in either
case, the Subsidiary Guarantor has assumed or guaranteed, or for which the
Subsidiary Guarantor is responsible or liable, directly or indirectly, jointly
or severally, as obligor, guarantor or otherwise, or which is secured by a lien
on the property of the Subsidiary Guarantor, and (i) renewals, extensions,
modifications, replacements, restatements and refundings of, or any indebtedness
or obligation issued in exchange for, any such indebtedness or obligation
described in clauses (a) through (h) of this paragraph; provided, however, that
Guarantor Senior Debt shall not include the Guarantee or any other indebtedness
or obligation if its terms or the terms of the instrument under which or
pursuant to which it is issued expressly provide that it is not superior in
right of payment to the Guarantee.

          "Holder" means the Person in whose name the Security is registered in
the Security Register.

          "Indenture" means this instrument as originally executed or as it may
from time to time be supplemented or amended by one or more indentures
supplemental hereto entered into pursuant to the applicable provisions hereof,
including, for all purposes of this instrument and any such supplemental
indenture, the provisions of the Trust Indenture Act that are deemed to be a
part of and govern this instrument and any such supplemental indenture,
respectively.

          "Interest Payment Date" means the Stated Maturity of an installment of
interest on the Securities.

          "Issue Date" means December 12, 2000.
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                                      -7-

          "Liquidated Damages" has the meaning specified in Section 10.11.

          "Liquidity Credit Facility" means the credit facility created pursuant
to the Liquidity Facility Credit Agreement dated as of October 3, 2000 among the
Subsidiary Guarantor, as borrower, the Company, as a guarantor, the lenders
identified therein and Bank of America, N.A. as administrative agent, as such
agreement has been or may be amended, supplemented, restated, extended, renewed
or otherwise modified from time to time and includes any agreement (and all
successor agreements thereto) extending the maturity of, refinancing or
otherwise restructuring all or any portion of the indebtedness under such
agreement or any successor agreement.

          "Maturity", when used with respect to any Security, means the date on
which the principal of such Security becomes due and payable as therein or
herein provided, whether at the Stated Maturity or by declaration of
acceleration, call for redemption, exercise of the repurchase right set forth in
Article XV or otherwise.

          "Non-electing Share" has the meaning specified in Section 12.11.

          "Notice of Default" has the meaning specified in Section 5.1(5).

          "Officers' Certificate" means a certificate signed by (i) the Chairman
of the Board, a Vice Chairman of the Board, the Chief Executive Officer, the
President, the Chief Operating Officer, a Senior Vice President or a Vice
President and by (ii) the Chief Financial Officer, the Treasurer, an Assistant
Treasurer, the Secretary or an Assistant Secretary of the Company, and delivered
to the Trustee.  One of the Officers signing an Officers' Certificate given
pursuant to Section 10.8 shall be the principal executive, financial or
accounting officer of the Company.

          "Opinion of Counsel" means a written opinion of counsel, who may be
counsel for the Company and who shall be acceptable to the Trustee.

          "Outstanding", when used with respect to Securities, means, as of the
date of determination, all Securities theretofore authenticated and delivered
under this Indenture, except:

          (i)    Securities theretofore canceled by the Trustee or delivered to
     the Trustee for cancellation;

          (ii)   Securities for the payment or redemption of which money in the
     necessary amount has been theretofore deposited with the Trustee or any
     Paying Agent (other than the Company) in trust or set aside and segregated
     in trust by the Company (if the Company shall act as its own Paying Agent)
     for the Holders of such Securities,
<PAGE>

                                      -8-

     provided that if such Securities are to be redeemed, notice of such
     redemption has been duly given pursuant to this Indenture or provision
     therefor satisfactory to the Trustee has been made;

          (iii)  Securities which have been paid pursuant to Section 3.6 or in
     exchange for or in lieu of which other Securities have been authenticated
     and delivered pursuant to this Indenture, other than any such Securities in
     respect of which there shall have been presented to the Trustee proof
     satisfactory to it that such Securities are held by a bona fide purchaser
     in whose hands such Securities are valid obligations of the Company; and

          (iv)   Securities converted into Common Stock pursuant to Article XII;

provided, however, that in determining whether the Holders of the requisite
principal amount of Outstanding Securities are present at a meeting of Holders
of Securities for quorum purposes or have given any request, demand,
authorization, direction, notice, consent or waiver hereunder, Securities owned
by the Company, the Subsidiary Guarantor or any other obligor upon the
Securities or any Affiliate of the Company, the Subsidiary Guarantor or such
other obligor shall be disregarded and deemed not to be Outstanding, except
that, in determining whether the Trustee shall be protected in relying upon any
such determination as to the presence of a quorum or upon any such request,
demand, authorization, direction, notice, consent or waiver, only Securities
which a Responsible Officer of the Trustee has been notified in writing to be so
owned shall be so disregarded.  Securities so owned which have been pledged in
good faith may be regarded as outstanding if the pledgee is not the Company, the
Subsidiary Guarantor or any other obligor upon the Securities or any Affiliate
of the Company, the Subsidiary Guarantor or such other obligor, and the Trustee
shall be protected in relying upon an Officers' Certificate to such effect.

          "Over-allotment option" has the meaning specified in Section 3.1.

          "Paying Agent" means any Person authorized by the Company to pay the
principal of or interest on any Securities on behalf of the Company and, except
as otherwise specifically set forth herein, such term shall include the Company
if it shall act as its own Paying Agent.  The Company has initially appointed
the Trustee as its Paying Agent pursuant to Section 10.2 hereof.

          "Payment Blockage Notice" means a notice of default from a
Representative or holder of Designated Senior Debt instructing the Trustee to
withhold all payments or distributions on the Securities.
<PAGE>

                                      -9-

          "Person" means any individual, corporation, limited liability company,
partnership, joint venture, trust, estate, unincorporated organization or
government or any agency or political subdivision thereof.

          "Place of Conversion" has the meaning specified in Section 3.1.

          "Place of Payment" has the meaning specified in Section 3.1.

          "Predecessor Security" of any particular Security means every previous
Security evidencing all or a portion of the same debt as that evidenced by such
particular Security; and, for the purposes of this definition, any Security
authenticated and delivered under Section 3.6 in exchange for or in lieu of a
mutilated, destroyed, lost or stolen Security shall be deemed to evidence the
same debt as the mutilated, destroyed, lost or stolen Security.

          "Purchase Agreement" means the Purchase Agreement, dated as of
December 12, 2000, among the Company, the Subsidiary Guarantor and the
Purchasers, as such agreement may be amended from time to time.

          "Purchasers" means Goldman, Sachs & Co., Banc of America Securities
LLC, Credit Suisse First Boston Corporation, First Union Securities, Inc. and
J.P. Morgan Securities Inc.

          "Qualified Institutional Buyer" shall mean a "qualified institutional
buyer" as defined in Rule 144A.

          "Receivables Securitization Facility" means a credit facility which
was entered into pursuant to the Receivables Purchase Agreement, dated May 14,
1999, among AmeriSource Receivables Financial Corporation, as seller, the
Subsidiary Guarantor, as servicer, the Company, as guarantor, Delaware Funding
Corporation, as buyer, and Morgan Guaranty Trust Company of New York, as
administrative agent, as such agreement has been or may be amended,
supplemented, restated, extended, renewed or otherwise modified from time to
time and includes any agreement (and all successor agreements thereto (extending
the maturity of, refinancing or otherwise restructuring all or any portion of
the indebtedness under such agreement or any successor agreement.

          "Record Date" means any Regular Record Date or Special Record Date.

          "Record Date Period" means the period from the close of business of
any Regular Record Date next preceding any Interest Payment Date to the opening
of business on such Interest Payment Date,
<PAGE>

                                     -10-

          "Redemption Date", when used with respect to any Security to be
redeemed, means the date fixed for such redemption by or pursuant to this
Indenture.

          "Redemption Price", when used with respect to any Security to be
redeemed, means the price at which it is to be redeemed pursuant to this
Indenture.

          "Registrable Securities" has the meaning specified in Section 10.11.

          "Registration Rights Agreement" means the Registration Rights
Agreement, dated as of December 12, 2000, between the Company, the Subsidiary
Guarantor and the Purchasers, as such agreement may be amended from time to
time.

          "Regular Record Date" for interest payable in respect of any Security
on any Interest Payment Date means the May 15 or November 15 (whether or not a
Business Day), as the case may be, next preceding such Interest Payment Date.

          "Representative" means the (a) indenture trustee or other trustee,
agent or representative for any Senior Debt or Guarantor Senior Debt or (b) with
respect to any Senior Debt or Guarantor Senior Debt that does not have any such
trustee, agent or other representative, (i) in the case of such Senior Debt or
Guarantor Senior Debt issued pursuant to an agreement providing for voting
arrangements as among the holders or owners of such Senior Debt or Guarantor
Senior Debt, any holder or owner of such Senior Debt or Guarantor Senior Debt
acting with the consent of the required persons necessary to bind such holders
or owners of such Senior Debt or Guarantor Senior Debt and (ii) in the case of
all other such Senior Debt or Guarantor Senior Debt, the holder or owner of such
Senior Debt or Guarantor Senior Debt.

          "Repurchase Date" has the meaning specified in Section 15.1.

          "Repurchase Price" has the meaning specified in Section 15.1.

          "Responsible Officer", when used with respect to the Trustee, means
any officer within the Corporate Trust Office of the Trustee with direct
responsibility for the administration of this Indenture and also means, with
respect to a particular corporate trust matter, any other officer to whom such
matter is referred because of his knowledge and familiarity with the particular
subject.

          "Restricted Global Security" has the meaning specified in Section 2.1.

          "Restricted Securities" means all Securities required pursuant to
Section 3.5(3) to bear any Restricted Securities Legend.  Such term includes the
Restricted Global Security.

          "Restricted Securities Certificate" means a certificate substantially
in the form set forth in Annex A.
<PAGE>

                                     -11-

          "Restricted Securities Legend" means, collectively, the legends
substantially in the forms of the legends required in the form of Security set
forth in Section 2.2 to be placed upon each Restricted Security.

          "Revolving Credit Facility" means a credit facility created pursuant
to the Revolving Credit Agreement dated as of January 8, 1997 among the
Subsidiary Guarantor, as borrower, the Company, as a guarantor, the lenders
identified therein and Bank of America, N.A., as administrative agent, as such
agreement has been or may be amended, supplemented, restated, extended, renewed
or otherwise modified from time to time and includes any agreement (and all
successor agreements thereto) extending the maturity of, refinancing or
otherwise restructuring all or any portion of the indebtedness under such
agreement or any successor agreement.

          "Rule 144A" means Rule 144A under the Securities Act (or any successor
provision), as it may be amended from time to time.

          "Rule 144A Information" has the meaning specified in Section 10.9.

          "Securities" has the meaning ascribed to it in the first paragraph
under the caption "Recitals".

          "Securities Act" means the United States Securities Act of 1933 (or
any successor statute), as amended from time to time.

          "Security Purchasers" has the meaning specified in Section 11.8.

          "Security Register" and "Security Registrar" have the respective
meanings specified in Section 3.5.

          "Senior Debt" means the principal of (and premium, if any) and
interest (including all interest accruing subsequent to the commencement of any
bankruptcy or similar proceeding, whether or not a claim for post-petition
interest is allowable as a claim in any such proceeding) on, and all fees and
other amounts payable in connection with, the following, whether absolute or
contingent, secured or unsecured, due or to become due, outstanding on the date
of this Indenture or thereafter created, incurred or assumed: (a) indebtedness
of the Company evidenced by a credit or loan agreement, note, bond, debenture or
other written obligation, (b) all obligations of the Company for money borrowed
and all obligations of the Company under the Receivables Securitization
Facility, (c) all obligations of the Company evidenced by a note or similar
instrument given in connection with the acquisition of any businesses,
properties or assets of any kind, (d) obligations of the Company (i) as lessee
under leases required to be capitalized on the balance sheet of the lessee under
generally accepted accounting principles or (ii) as lessee under other leases
for facilities, capital equipment or re-
<PAGE>

                                     -12-

lated assets, whether or not capitalized, entered into or leased for financing
purposes, (e) all obligations of the Company under interest rate and currency
swaps, caps, floors, collars, hedge agreements, forward contracts or similar
agreements or arrangements, (f) all obligations of the Company with respect to
letters of credit, bankers' acceptances and similar facilities (including
reimbursement obligations with respect to the foregoing), (g) all obligations of
the Company issued or assumed as the deferred purchase price of property or
services (but excluding trade accounts payable and accrued liabilities arising
in the ordinary course of business), (h) all obligations of the type referred to
in clauses (a) through (g) of this paragraph of another Person and all dividends
of another Person, the payment of which, in either case, the Company has assumed
or guaranteed, or for which the Company is responsible or liable, directly or
indirectly, jointly or severally, as obligor, guarantor or otherwise, or which
is secured by a lien on the property of the Company, including without
limitation the Company's obligations as guarantor of the Liquidity Credit
Facility and the Revolving Credit Facility, and (i) renewals, extensions,
modifications, replacements, restatements and refundings of, or any indebtedness
or obligation issued in exchange for, any such indebtedness or obligation
described in clauses (a) through (h) of this paragraph; provided, however, that
Senior Debt shall not include the Securities or any other indebtedness or
obligation if its terms or the terms of the instrument under which or pursuant
to which it is issued expressly provide that it is not superior in right of
payment to the Securities.

          "Significant Subsidiary" means, with respect to any Person, a
Subsidiary of such Person that would constitute a "significant subsidiary" as
such term is defined under Rule 1-02 of Regulation S-X under the Securities Act
and the Exchange Act.

          "Special Record Date" for the payment of any Defaulted Interest means
a date fixed by the Company pursuant to Section 3.7.

          "Stated Maturity", when used with respect to any Security or any
installment of interest thereon, means the date specified in such Security as
the fixed date on which the principal of such Security or such installment of
interest is due and payable.

          "Subsidiary" means a corporation more than 50% of the outstanding
voting stock of which is owned, directly or indirectly, by the Company or by one
or more other Subsidiaries, or by the Company and one or more other
Subsidiaries.  For the purposes of this definition, "voting stock" means stock
or other similar interests in the corporation which ordinarily has or have
voting power for the election of directors, or persons performing similar
functions, whether at all times or only so long as no senior class of stock or
other interests has or have such voting power by reason of any contingency.

          "Subsidiary Guarantor" has the meaning ascribed to it in the first
paragraph under the caption "Recitals".
<PAGE>

                                     -13-

          "Successor Security" of any particular Security means every Security
issued after, and evidencing all or a portion of the same debt as that evidenced
by, such particular Security; and, for the purposes of this definition, any
Security authenticated and delivered under Section 3.6 in exchange for or in
lieu of a mutilated, destroyed, lost or stolen Security shall be deemed to
evidence the same debt as the mutilated, destroyed, lost or stolen Security.

          "Surrender Certificate" means a certificate substantially in the form
set forth in Annex C.

          "Trading Day" means (i) if the Common Stock is listed or admitted for
trading on the New York Stock Exchange or any other national or regional
securities exchange, days on which such national or regional securities exchange
is open for business, (ii) if the Common Stock is quoted on the Nasdaq National
Market or any other system of automated dissemination of quotations of
securities prices, days on which trades may be effected through such system, or
(iii) if the Common Stock is not listed on a national or regional securities
exchange or quoted on the Nasdaq National Market or any other system of
automated dissemination of quotation of securities prices, days on which the
Common Stock is traded regular way in the over-the-counter market and for which
a closing bid and a closing asked price for the Common Stock are available.

          "Trigger Event" has the meaning specified in Section 12.12.

          "Trust Indenture Act" means the Trust Indenture Act of 1939, and the
rules and regulations thereunder, as in force at the date as of which this
instrument was executed, provided, however, that in the event the Trust
Indenture Act of 1939 is amended after such date, "Trust Indenture Act" means,
to the extent required by any such amendment, the Trust Indenture Act of 1939,
and the rules and regulations thereunder, as so amended.

          "Trustee" means the Person named as the "Trustee" in the first
paragraph of this instrument until a successor Trustee shall have become such
pursuant to the applicable provisions of this Indenture, and thereafter
"Trustee" shall mean such successor Trustee.

          "United States" means the United States of America (including the
States and the District of Columbia), its territories, its possessions and other
areas subject to its jurisdiction (its "possessions" including Puerto Rico, the
U.S. Virgin Islands, Guam, American Samoa, Wake Island and the Northern Mariana
Islands).

          "Unrestricted Securities Certificate" means a certificate
substantially in the form set forth in Annex B.
<PAGE>

                                     -14-

SECTION 1.2    Compliance Certificates and Opinions.
               ------------------------------------

          Upon any application or request by the Company to the Trustee to take
any action under any provision of this Indenture, the Company shall furnish to
the Trustee an Officers' Certificate stating that all conditions precedent, if
any, provided for in this Indenture relating to the proposed action have been
complied with and an opinion of Counsel stating that in the opinion of such
counsel all such conditions precedent, if any, have been complied with, except
that in the case of any such application or request as to which the furnishing
of such documents is specifically required by any provision of this Indenture
relating to such particular application or request, no additional certificate or
opinion need be furnished.

          Every certificate or opinion with respect to compliance with a
condition or covenant provided for in this Indenture (including certificates
provided for in Section 10.8) shall include:

           (1)    a statement that each individual signing such certificate or
     opinion has read such covenant or condition and the definitions herein
     relating thereto;

           (2)    a brief statement as to the nature and scope of the
     examination or investigation upon which the statements or opinions
     contained in such certificate or opinion are based;

           (3)    a statement that, in the opinion of such individual, he has
     made such examination or investigation as is necessary to enable him to
     express an informed opinion as to whether or not such covenant or condition
     has been complied with; and

           (4)    a statement as to whether, in the opinion of each such
     individual, such condition or covenant has been complied with.

SECTION 1.3    Form of Documents Delivered to the Trustee.
               ------------------------------------------

           In any case where several matters are required to be certified by, or
covered by an opinion of, any specified Person, it is not necessary that all
such matters be certified by, or covered by the opinion of only one such Person,
or that they be so certified or covered by only one document, but one such
Person may certify or give an opinion with respect to some matters and one or
more other such Persons as to other matters, and any such Person may certify or
give an opinion as to such matters in one or several documents.

           Any certificate or opinion of an officer of the Company may be based,
insofar as it relates to legal matters, upon a certificate or opinion of, or
representations by, counsel, unless such officer knows, or in the exercise of
reasonable care should know, that the certificate or opinion or representations
with respect to the matters upon which such certificate or opin-
<PAGE>

                                     -15-

ion is based are erroneous. Any such certificate or opinion of counsel may be
based, insofar as it relates to factual matters, upon a certificate or opinion
of, or representations by, an officer or officers of the Company or any other
Person stating that the information with respect to such factual matters is in
the possession of the Company or such other Person, unless such counsel knows,
or in the exercise of reasonable care should know, that the certificate or
opinion or representations with respect to such matters are erroneous.

          Where any Person is required to make, give or execute two or more
applications, requests, consents, certificates, statements, opinions or other
instruments under this Indenture, they may, but need not, be consolidated and
form one instrument.

SECTION 1.4  Acts of Holders of Securities.
             -----------------------------

          (1) Any request, demand, authorization, direction, notice, consent,
waiver or other action provided or permitted by this Indenture to be given or
taken by Holders of Securities may be embodied in and evidenced by (A) one or
more instruments of substantially similar tenor signed by such Holders in person
or by an agent or proxy duly appointed in writing by such Holders or (B) the
record of Holders of Securities voting in favor thereof, either in person or by
proxies duly appointed in writing, at any meeting of Holders of Securities duly
called and held in accordance with the provisions of Article IX.  Such action
shall become effective when such instrument or instruments or record is
delivered to the Trustee and, where it is hereby expressly required, to the
Company.  The Trustee shall promptly deliver to the Company copies of all such
instruments and records delivered to the Trustee.  Such instrument or
instruments and records (and the action embodied therein and evidenced thereby)
are herein sometimes referred to as the "Act" of the Holders of Securities
signing such instrument or instruments and so voting at such meeting.  Proof of
execution of any such instrument or of a writing appointing any such agent or
proxy, or of the holding by any Person of a Security, shall be sufficient for
any purpose of this Indenture and (subject to Section 6.1) conclusive in favor
of the Trustee and the Company if made in the manner provided in this Section.
The record of any meeting of Holders of Securities shall be proved in the manner
provided in Section 9.6.

          (2) The fact and date of the execution by any Person of any such
instrument or writing may be proved by the affidavit of a witness of such
execution or by a certificate of a notary public or other officer authorized by
law to take acknowledgments of deeds, certifying that the individual signing
such instrument or writing acknowledged to him the execution thereof.  Where
such execution is by a signer acting in a capacity other than his individual
capacity, such certificate or affidavit shall also constitute sufficient proof
of his authority.

          (3) The principal amount and serial number of any Security held by any
Person, and the date of his holding the same, shall be proved by the Security
Register.
<PAGE>

                                     -16-

          (4) The fact and date of execution of any such instrument or writing
and the authority of the Person executing the same may also be proved in any
other manner which the Trustee deems sufficient; and the Trustee may in any
instance require further proof with respect to any of the matters referred to in
this Section 1.4.

          (5) The Company may set any day as the record date for the purpose of
determining the Holders entitled to give or take any request, demand,
authorization, direction, notice, consent, waiver or other action, or to vote on
any action, authorized or permitted by this Indenture to be given or taken by
Holders.  Promptly and in any case not later than ten days after setting a
record date, the Company shall notify the Trustee and the Holders of such record
date.  If not set by the Company prior to the first solicitation of a Holder
made by any Person in respect of any such action, or, in the case of any such
vote, prior to such vote, the record date for any such action or vote shall be
the 30th day (or, if later, the date of the most recent list of Holders required
to be provided pursuant to Section 16.1) prior to such first solicitation or
vote, as the case may be.  With regard to any record date, the Holders on such
date (or their duly appointed agents or proxies), and only such Persons, shall
be entitled to give or take, or vote on, the relevant action, whether or not
such Holders remain Holders after such record date.  Notwithstanding the
foregoing, the Company shall not set a record date for, and the provisions of
this paragraph shall not apply with respect to, any notice, declaration or
direction referred to in the next paragraph.

          Upon receipt by the Trustee from any Holder of (i) any notice of
default or breach referred to in Section 5.1(4), if such default or breach has
occurred and is continuing and the Trustee shall not have given such a notice to
the Company, (ii) any declaration of acceleration referred to in Section 5.2, if
an Event of Default has occurred and is continuing and the Trustee shall not
have given such a declaration to the Company, or (iii) any direction referred to
in Section 5.12, if the Trustee shall not have taken the action specified in
such direction, then, with respect to clauses (ii) and (iii), a record date
shall automatically and without any action by the Company or the Trustee be set
for determining the Holders entitled to join in such declaration or direction,
which record date shall be the close of business on the tenth day (or, if such
day is not a Business Day, the first Business Day thereafter) following the day
on which the Trustee receives such declaration or direction, and, with respect
to clause (i), the Trustee may set any day as a record date for the purpose of
determining the Holders entitled to join in such notice of default.  Promptly
after such receipt by the Trustee of any such declaration or direction referred
to in clause (ii) or (iii), and promptly after setting any record date with
respect to clause (i), and as soon as practicable thereafter, the Trustee shall
notify the Company and the Holders of any such record date so fixed.  The
Holders on such record date (or their duly appointed agents or proxies), and
only such Persons, shall be entitled to join in such notice, declaration or
direction, whether or not such Holders remain Holders after such record date;
provided that, unless such notice, declaration or direction shall have become
effective by virtue of Holders of the requisite principal amount of Securities
on such record date
<PAGE>

                                     -17-

(or their duly appointed agents or proxies) having joined therein on or prior to
the 90th day after such record date, such notice, declaration or direction shall
automatically and without any action by any Person be canceled and of no further
effect. Nothing in this paragraph shall be construed to prevent a Holder (or a
duly appointed agent or proxy thereof) from giving, before or after the
expiration of such 90-day period, a notice, declaration or direction contrary to
or different from, or, after the expiration of such period, identical to, the
notice, declaration or direction to which such record date relates, in which
event a new record date in respect thereof shall be set pursuant to this
paragraph. In addition, nothing in this paragraph shall be construed to render
ineffective any notice, declaration or direction of the type referred to in this
paragraph given at any time to the Trustee and the Company by Holders (or their
duly appointed agents or proxies) of the requisite principal amount of
Securities on the date such notice, declaration or direction is so given.

          (6) Any request, demand, authorization, direction, notice, consent,
election, waiver or other Act of the Holder of any Security shall bind every
future Holder of the same Security and the Holder of every Security issued upon
the registration of transfer thereof or in exchange therefor or in lieu thereof
in respect of anything done, omitted or suffered to be done by the Trustee or
the Company in reliance thereon, whether or not notation of such action is made
upon such Security.

           (7) The provisions of this Section 1.4 are subject to the provisions
of Section 9.5.

SECTION 1.5  Notices, Etc., to the Trustee and Company.
             -----------------------------------------

           Any request, demand, authorization, direction, notice, consent,
election, waiver or other Act of Holders of Securities or other document
provided or permitted by this Indenture to be made upon, given or furnished to,
or filed with,

           (1) the Trustee by any Holder of Securities or by the Company shall
     be sufficient for every purpose hereunder if made, given, furnished or
     filed in writing to or with a Responsible Officer of the Trustee and
     received at its Corporate Trust Office, Attention: Corporate Trust
     Administration (AMERISOURCE HEALTH CORPORATION, 5% Convertible Subordinated
     Notes due December 1, 2007).

           (2) the Company by the Trustee or by any Holder of Securities shall
     be sufficient for every purpose hereunder (unless otherwise herein
     expressly provided) if in writing, mailed, first-class postage prepaid, or
     telecopied and confirmed by mail, first-class postage prepaid, or delivered
     by hand or overnight courier, addressed to the Company at 1300 Morris
     Drive, Suite 100, Chesterbrook, PA 19087-5594, Attention: Chief Financial
     Officer, or at any other address previously furnished in writing to the
     Trustee by the Company.
<PAGE>

                                     -18-

SECTION 1.6  Notice to Holders of Securities; Waiver.
             ---------------------------------------

          Except as otherwise expressly provided herein, where this Indenture
provides for notice to Holders of Securities of any event, such notice shall be
sufficiently given to Holders if in writing and mailed, first-class postage
prepaid, or delivered by an overnight delivery service to each Holder of a
Security affected by such event, at the address of such Holder as it appears in
the Security Register, not earlier than the earliest date and not later than the
latest date prescribed for the giving of such notice.

          Neither the failure to mail such notice, nor any defect in any notice
so mailed, to any particular Holder of a Security shall affect the sufficiency
of such notice with respect to other Holders of Securities.  In case by reason
of the suspension of regular mail service or by reason of any other cause it
shall be impracticable to give such notice by mail, then such notification to
Holders of Securities as shall be made with the approval of the Trustee, which
approval shall not be unreasonably withheld, shall constitute a sufficient
notification to such Holders for every purpose hereunder.

          Such notice shall be deemed to have been given when such notice is
mailed.

          Where this Indenture provides for notice in any manner, such notice
may be waived in writing by the Person entitled to receive such notice, either
before or after the event, and such waiver shall be the equivalent of such
notice.  Waivers of notice by Holders of Securities shall be filed with the
Trustee, but such filing shall not be a condition precedent to the validity of
any action taken in reliance upon such waiver.

SECTION 1.7  Effect of Headings and Table of Contents.
             ----------------------------------------

          The Article and Section headings herein and the Table of Contents are
for convenience only and shall not affect the construction hereof.

SECTION 1.8  Successors and Assigns.
             ----------------------

          All covenants and agreements in this Indenture by the Company and the
Subsidiary Guarantor shall bind their successors and assigns, whether so
expressed or not.

SECTION 1.9  Separability Clause.
             -------------------

          In case any provision in this Indenture or the Securities shall be
invalid, illegal or unenforceable, the validity, legality and enforceability of
the remaining provisions shall not in any way be affected or impaired thereby.
<PAGE>

                                     -19-

SECTION 1.10  Benefits of Indenture.
              ---------------------

          Except as provided in the next sentence, nothing in this Indenture or
in the Securities, express or implied, shall give to any Person, other than the
parties hereto and their successors and assigns hereunder and the Holders of
Securities, any benefit or legal or equitable right, remedy or claim under this
Indenture.  The provisions of Article XIII are intended to be for the benefit
of, and shall be enforceable directly by, the holders of Senior Debt and the
provisions of Article XIV are intended to be for the benefit of, and shall be
enforceable directly by, the holders of Guarantor Senior Debt.

SECTION 1.11  Governing Law.
              -------------

          THIS INDENTURE, THE GUARANTEE AND THE SECURITIES SHALL BE GOVERNED BY
AND CONSTRUED IN ACCORDANCE WITH THE LAWS OF THE STATE OF NEW YORK, THE UNITED
STATES OF AMERICA, WITHOUT REGARD TO THE PRINCIPLES OF CONFLICTS OF LAWS.

SECTION 1.12  Legal Holidays.
              --------------

          In any case where any Interest Payment Date, Redemption Date,
Repurchase Date or Stated Maturity of any Security or the last day on which a
Holder of a Security has a right to convert his Security shall not be a Business
Day at a Place of Payment or Place of Conversion, as the case may be, then
(notwithstanding any other provision of this Indenture or of the Securities)
payment of principal of, premium, if any, or interest on, or the payment of the
Redemption Price or Repurchase Price (whether the same is payable in cash or in
shares of Common Stock in the case of the Repurchase Price) with respect to, or
delivery for conversion of, such Security need not be made at such Place of
Payment or Place of Conversion, as the case may be, on or by such day, but may
be made on or by the next succeeding Business Day at such Place of Payment or
Place of Conversion, as the case may be, with the same force and effect as if
made on the Interest Payment Date, Redemption Date or Repurchase Date, or at the
Stated Maturity or by such last day for conversion; provided, however, that in
the case that payment is made on such succeeding Business Day, no interest shall
accrue on the amount so payable for the period from and after such Interest
Payment Date, Redemption Date, Repurchase Date, Stated Maturity or last day for
conversion, as the case may be.

SECTION 1.13  Conflict with Trust Indenture Act.
              ---------------------------------

          If any provision hereof limits, qualifies or conflicts with a
provision of the Trust Indenture Act that is required under such Act to be a
part of and govern this Indenture, the latter provision shall control.  If any
provision of this Indenture modifies or excludes any provision of the Trust
Indenture Act that may be so modified or excluded, the latter provision shall be
deemed to apply to this Indenture as so modified or to be excluded, as the case
may be.
<PAGE>

                                     -20-

Until such time as this Indenture shall be qualified under the Trust Indenture
Act, this Indenture, the Company and the Trustee shall be deemed for all
purposes hereof to be subject to and governed by the Trust Indenture Act to the
same extent as would be the case if this Indenture were so qualified on the date
hereof.

                                   ARTICLE II

                                 SECURITY FORMS

SECTION 2.1  Form Generally.
             --------------

          The Securities shall be in substantially the form set forth in this
Article, with such appropriate insertions, omissions, substitutions and other
variations as are required or permitted by this Indenture, and may have such
letters, numbers or other marks of identification and such legends or
endorsements placed thereon as may be required to comply with the rules of any
securities exchange, the Internal Revenue Code of 1986, as amended, and
regulations thereunder (the "Code"), or as may, consistent herewith, be
determined by the officers executing such Securities, as evidenced by their
execution thereof.  All Securities shall be in fully registered form.

          The Trustee's certificates of authentication shall be in substantially
the form set forth in Section 2.3.

          Conversion notices shall be in substantially the form set forth in
Section 2.4.

          Repurchase notices shall be substantially in the form set forth in
Section 2.2.

          The Securities shall be printed, lithographed, typewritten or engraved
or produced by any combination of these methods or may be produced in any other
manner permitted by the rules of any automated quotation system or securities
exchange (including on steel engraved borders if so required by any securities
exchange upon which the Securities may be listed) on which the Securities may be
quoted or listed, as the case may be, all as determined by the officers
executing such Securities, as evidenced by their execution thereof.

          Upon their original issuance, Securities issued as contemplated by the
Purchase Agreement to Qualified Institutional Buyers in reliance on Rule 144A
shall be issued in the form of one or more Global Securities in definitive,
fully registered form without interest coupons and bearing the Restricted
Securities Legend.  Such Global Security shall be registered in the name of DTC,
as Depositary, or its nominee and deposited with the Trustee, as custodian for
DTC, for credit by DTC to the respective accounts of beneficial owners of the
Securities
<PAGE>

                                     -21-

represented thereby (or such other accounts as they may direct). Such Global
Security, together with its Successor Securities which are Global Securities,
are collectively herein called the "Restricted Global Security".

SECTION 2.2    Form of Security with Guarantee.
               -------------------------------

                                [FORM OF FACE]

          [THE FOLLOWING LEGEND SHALL APPEAR ON THE FACE OF EACH RESTRICTED
SECURITY:

          THIS SECURITY AND ANY COMMON STOCK ISSUABLE UPON THE CONVERSION OF
THIS SECURITY HAVE NOT BEEN REGISTERED UNDER THE U.S. SECURITIES ACT OF 1933, AS
AMENDED (THE "SECURITIES ACT"), AND MAY NOT BE SOLD OR OTHERWISE TRANSFERRED IN
THE ABSENCE OF SUCH REGISTRATION OR AN APPLICABLE EXEMPTION THEREFROM.  EACH
PURCHASER OF THIS SECURITY IS HEREBY NOTIFIED THAT THE SELLER OF THIS SECURITY
MAY BE RELYING ON THE EXEMPTION FROM THE PROVISIONS OF SECTION 5 OF THE
SECURITIES ACT PROVIDED BY RULE 144A THEREUNDER.

          THIS SECURITY AND ANY COMMON STOCK ISSUABLE UPON CONVERSION OF THIS
SECURITY MAY NOT BE OFFERED, SOLD, PLEDGED OR OTHERWISE TRANSFERRED EXCEPT
(A)(1) TO A PERSON WHO THE TRANSFEROR REASONABLY BELIEVES IS A QUALIFIED
INSTITUTIONAL BUYER WITHIN THE MEANING OF RULE 144A UNDER THE SECURITIES ACT
ACQUIRING FOR ITS OWN ACCOUNT OR THE ACCOUNT OF A QUALIFIED INSTITUTIONAL BUYER
IN A TRANSACTION MEETING THE REQUIREMENTS OF RULE 144A, (2) PURSUANT TO THE
EXEMPTION FROM REGISTRATION UNDER THE SECURITIES ACT PROVIDED BY RULE 144
THEREUNDER (IF AVAILABLE), (3) TO AN INSTITUTION THAT IS AN "ACCREDITED
INVESTOR" WITHIN THE MEANING OF RULE 501(a)(1), (2), (3) OR (7) OF REGULATION D
UNDER THE SECURITIES ACT PURSUANT TO AN EXEMPTION FROM REGISTRATION UNDER THE
SECURITIES ACT (IF AVAILABLE) OR (4) PURSUANT TO AN EFFECTIVE REGISTRATION
STATEMENT UNDER THE SECURITIES ACT, AND (B) IN ACCORDANCE WITH ALL APPLICABLE
SECURITIES LAWS OF THE STATES OF THE UNITED STATES AND OTHER JURISDICTIONS.

          THIS SECURITY, ANY SHARES OF COMMON STOCK ISSUABLE UPON ITS CONVERSION
AND ANY RELATED DOCUMENTATION MAY BE AMENDED OR SUPPLEMENTED FROM TIME TO TIME
TO MODIFY THE RESTRICTIONS ON RESALES AND OTHER TRANSFERS OF THIS SECURITY AND
ANY SUCH SHARES TO REFLECT ANY CHANGE IN APPLICABLE LAW OR REGULA-
<PAGE>

                                     -22-

TION (OR THE INTERPRETATION THEREOF) OR IN PRACTICES RELATING TO THE RESALE OR
TRANSFER OF RESTRICTED SECURITIES GENERALLY. THE HOLDER OF THIS SECURITY AND ANY
SUCH SHARES SHALL BE DEEMED BY THE ACCEPTANCE OF THIS SECURITY AND ANY SUCH
SHARES TO HAVE AGREED TO ANY SUCH AMENDMENT OR SUPPLEMENT.]

          [THE FOLLOWING LEGEND SHALL APPEAR ON THE FACE OF EACH GLOBAL
SECURITY:

          THIS SECURITY IS A GLOBAL SECURITY WITHIN THE MEANING OF THE INDENTURE
HEREINAFTER REFERRED TO AND IS REGISTERED IN THE NAME OF THE DEPOSITARY OR A
NOMINEE OF THE DEPOSITARY, WHICH MAY BE TREATED BY THE COMPANY, THE TRUSTEE AND
ANY AGENT THEREOF AS OWNER AND HOLDER OF THIS SECURITY FOR ALL PURPOSES.

          UNLESS THIS CERTIFICATE IS PRESENTED BY AN AUTHORIZED REPRESENTATIVE
OF THE DEPOSITORY TRUST COMPANY, A NEW YORK CORPORATION ("DTC"), TO THE COMPANY
OR ITS AGENT FOR REGISTRATION OF TRANSFER, EXCHANGE OR PAYMENT, AND ANY
CERTIFICATE ISSUED IS REGISTERED IN THE NAME OF CEDE & CO. OR IN SUCH OTHER NAME
AS IS REQUESTED BY AN AUTHORIZED REPRESENTATIVE OF DTC (AND ANY PAYMENT IS MADE
TO CEDE & CO. OR TO SUCH OTHER ENTITY AS IS REQUESTED BY AN AUTHORIZED
REPRESENTATIVE OF DTC), ANY TRANSFER, PLEDGE OR OTHER USE HEREOF FOR VALUE OR
OTHERWISE BY OR TO ANY PERSON IS WRONGFUL, INASMUCH AS THE REGISTERED OWNER
HEREOF, CEDE & CO., HAS AN INTEREST HEREIN.

          UNLESS AND UNTIL IT IS EXCHANGED IN WHOLE OR IN PART FOR SECURITIES IN
DEFINITIVE REGISTERED FORM IN THE LIMITED CIRCUMSTANCES REFERRED TO IN THE
INDENTURE, THIS GLOBAL SECURITY MAY NOT BE TRANSFERRED EXCEPT AS A WHOLE BY THE
DEPOSITARY TO A NOMINEE OF THE DEPOSITARY OR BY A NOMINEE OF THE DEPOSITARY TO
THE DEPOSITARY OR ANOTHER NOMINEE OF THE DEPOSITARY OR BY THE DEPOSITARY OR ANY
SUCH NOMINEE TO A SUCCESSOR DEPOSITARY OR A NOMINEE OF SUCH SUCCESSOR
DEPOSITARY.]
<PAGE>

                                -23-

                        AMERISOURCE HEALTH CORPORATION

             5% CONVERTIBLE SUBORDINATED NOTE DUE DECEMBER 1, 2007

No._________
       $________

CUSIP NO. 03071PAB8

          AMERISOURCE HEALTH CORPORATION, a corporation duly organized and
existing under the laws of the State of Delaware (herein called the "Company",
which term includes any successor Person under the Indenture referred to on the
reverse hereof), for value received, hereby promises to pay to __________ or
registered assigns, the principal sum of United States Dollars ($_______) [if
this Security is a Global Security, then insert -- (which principal amount may
from time to time be increased or decreased to such other principal amounts
(which, taken together with the principal amounts of all other Outstanding
Securities, shall not exceed $250,000,000 (or $300,000,000 if the Over-allotment
Option is exercised in full) by adjustments made on the records of the Trustee
hereinafter referred to in accordance with the Indenture)] on December 1, 2007
and to pay interest thereon, from December 12, 2000, or from the most recent
Interest Payment Date (as defined below) to which interest has been paid or duly
provided for, semi-annually in arrears on June 1 and December 1 in each year
(each, an "Interest Payment Date"), commencing June 1, 2001, at the rate of 5%
per annum, until the principal hereof is due, and at the rate of 5% per annum on
any overdue principal and premium, if any, and, to the extent permitted by law,
on any overdue interest.  The interest so payable, and punctually paid or duly
provided for, on any Interest Payment Date will, as provided in the Indenture,
be paid to the Person in whose name this Security (or one or more Predecessor
Securities) is registered at the close of business on the Regular Record Date
for such interest, which shall be the May 15 or November 15 (whether or not a
Business Day), as the case may be, next preceding such Interest Payment Date.
Except as otherwise provided in the Indenture, any such interest not so
punctually paid or duly provided for will forthwith cease to be payable to the
Holder on such Regular Record Date and may either be paid to the Person in whose
name this Security (or one or more Predecessor Securities) is registered at the
close of business on a Special Record Date for the payment of such Defaulted
Interest to be fixed by the Company, notice whereof shall be given to Holders of
Securities not less than 10 days prior to the Special Record Date, or be paid at
any time in any other lawful manner not inconsistent with the requirements of
any automated quotation system or securities exchange on which the Securities
may be quoted or listed, and upon such notice as may be required by such
exchange, all as more fully provided in the Indenture.  Payments of principal
shall be made upon the surrender of this Security at the option of the Holder at
the Corporate Trust Office of the Trustee, or at such other office or agency of
the Company as may be designated by it for such purpose in the Borough of
Manhattan, The City of New York, in such lawful monies of the United
<PAGE>

                                     -24-

States of America as at the time of payment shall be legal tender for the
payment of public and private debts, or at such other offices or agencies as the
Company may designate, by United States Dollar check drawn on, or wire transfer
to, a United States Dollar account (such a transfer to be made only to a Holder
of an aggregate principal amount of Securities in excess of $2,000,000 and only
if such Holder shall have furnished wire instructions in writing to the trustee
no later than 15 days prior to the relevant payment date). Payment of interest
on this Security may be made by United States Dollar check mailed to the address
of the Person entitled thereto as such address shall appear in the Security
Register, or, upon written application by the Holder to the Security Registrar
setting forth wire instructions not later than the relevant Record Date, by
transfer to a United States Dollar account (such a transfer to be made only to a
Holder of an aggregate principal amount of Securities in excess of $2,000,000
and only if such Holder shall have furnished wire instructions in writing to the
Trustee no later than 15 days prior to the relevant payment date).

          Except as specifically provided herein and in the Indenture, the
Company shall not be required to make any payment with respect to any tax,
assessment or other governmental charge imposed by any governmental or any
political subdivision or taxing authority thereof or therein.

          Reference is hereby made to the further provisions of this Security
set forth on the reverse hereof, which further provisions shall for all purposes
have the same effect as if set forth at this place.

          Unless the certificate of authentication hereon has been executed by
the Trustee referred to on the reverse hereof or an Authenticating Agent by the
manual signature of one of their respective authorized signatories, this
Security shall not be entitled to any benefit under the Indenture or be valid or
obligatory for any purpose.

          IN WITNESS WHEREOF, the  Company has caused this Security to be duly
executed.

                                                  AMERISOURCE HEALTH CORPORATION

                                                  By: __________________________
                                                      Name:
                                                      Title:
<PAGE>

                                     -25-

TRUSTEE'S CERTIFICATE OF AUTHENTICATION

This is one of the Securities referred to in the within-mentioned Indenture.

Dated:  December 12, 2000

BANK ONE TRUST COMPANY, N.A.,

as Trustee

By: _________________________
    Authorized Signatory
<PAGE>

                                     -26-

                               [FORM OF REVERSE]

          This Security is one of a duly authorized issue of securities of the
Company designated as its 5% Convertible Subordinated Notes due December 1, 2007
(herein called the "Securities"), limited in aggregate principal amount to
$250,000,000 (or $300,000,000 if the Over-allotment Option is exercised in
full), issued and to be issued under an Indenture, dated as of December 12, 2000
(herein called the "Indenture"), among the Company, the Subsidiary Guarantor and
Bank One Trust Company, N.A., as Trustee (herein called the "Trustee", which
term includes any successor trustee under the Indenture), to which Indenture and
all indentures supplemental thereto reference is hereby made for a statement of
the respective rights, limitations of rights, duties and immunities thereunder
of the Company, the Trustee, the holders of Senior Debt, the holders of
Guarantor Senior Debt and the Holders of the Securities and of the terms upon
which the Securities are, and are to be, authenticated and delivered.  As
provided in the Indenture and subject to certain limitations therein set forth,
Securities are exchangeable for a like aggregate principal amount of Securities
of any authorized denominations as requested by the Holder surrendering the same
upon surrender of the Security or Securities to be exchanged, at the Corporate
Trust Office of the Trustee.  The Trustee upon such surrender by the Holder will
issue the new Securities in the requested denominations.

          No sinking fund is provided for the Securities.  The Securities will
not be subject to redemption prior to December 3, 2004 and will be redeemable on
and after that date at the option of the Company, in whole or in part, upon not
less than 30 nor more than 60 days' notice to the Holders prior to the
Redemption Date at the Redemption Prices (expressed as percentages of the
principal amount) set forth below.

          The following table sets forth the Redemption Prices (expressed as
percentages of the principal amount) if such Security is redeemed during the 12-
month period beginning December 1 (December 3, 2004 through December 1, 2005 in
the case of the first such period):

                   YEAR                             REDEMPTION PRICE
                   ----                             ----------------

                   2004                                 102.143%
                   2005                                 101.429%
                   2006                                 100.714%

and thereafter at a Redemption Price equal to 100% of the principal amount,
together, in each case, with accrued interest to the Redemption Date; provided,
however, that interest installments on Securities whose Stated Maturity is on or
prior to such Redemption Date will be payable to the Holders of such Securities,
or one or more Predecessor Securities, of record at the close of business on the
relevant Record Dates referred to on the face hereof, all as provided in the
Indenture.
<PAGE>

                                     -27-

          In the event of a redemption of the Securities, the Company will not
be required (a) to register the transfer or exchange of Securities for a period
of 15 days immediately preceding the date notice is given identifying the serial
numbers of the Securities called for such redemption or (b) to register the
transfer or exchange of any Security, or portion thereof, called for redemption.

          In any case where the due date for the payment of the principal of,
premium, if any, interest, or Liquidated Damages on any Security or the last day
on which a Holder of a Security has a right to convert his Security shall be, at
any Place of Payment or Place of Conversion as the case may be, a day on which
banking institutions at such Place of Payment or Place of Conversion are
authorized or obligated by law or executive order to close, then payment of
principal, premium, if any, interest, or Liquidated Damages, or delivery for
conversion of such Security need not be made on or by such date at such place
but may be made on or by the next succeeding day at such place which is not a
day on which banking institutions are authorized or obligated by law or
executive order to close, with the same force and effect as if made on the date
for such payment or the date fixed for redemption or repurchase, or by such last
day for conversion, and no interest shall accrue on the amount so payable for
the period after such date.

          Subject to and upon compliance with the provisions of the Indenture,
the Holder of this Security is entitled, at his option, at any time on or before
the close of business on the date of Maturity, or in case this Security or a
portion hereof is called for redemption or the Holder hereof has exercised his
right to require the Company to repurchase this Security or such portion hereof,
then in respect of this Security until and including, but (unless the Company
defaults in making the payment due upon redemption or repurchase, as the case
may be) not after, the close of business on the Redemption Date or the
Repurchase Date, as the case may be, to convert this Security (or any portion of
the principal amount hereof that is an integral multiple of $1,000, provided
that the unconverted portion of such principal amount is $1,000 or any integral
multiple of $1,000 in excess thereof) into fully paid and nonassessable shares
of Common Stock of the Company at an initial Conversion Rate of 18.8791 shares
of Common Stock for each $1,000 principal amount of Securities (or at the
current adjusted Conversion Rate if an adjustment has been made as provided in
the Indenture) by surrender of this Security, duly endorsed or assigned to the
Company or in blank and, in case such surrender shall be made during the period
from the close of business on any Regular Record Date next preceding any
Interest Payment Date to the opening of business on such Interest Payment Date
(except if this Security or portion thereof has been called for redemption on a
Redemption Date or is repurchasable on a Repurchase Date occurring, in either
case, during such period and, as a result, the right to convert would terminate
in such period), also accompanied by payment in New York Clearing House or other
funds acceptable to the Company of an amount equal to the interest payable on
such Interest Payment Date on the principal amount of this Security then being
converted, and also the conversion notice hereon duly executed, to the Com-
<PAGE>

                                     -28-

pany at the Corporate Trust Office of the Trustee, or at such other office or
agency of the Company, subject to any laws or regulations applicable thereto and
subject to the right of the Company to terminate the appointment of any
Conversion Agent (as defined below) as may be designated by it for such purpose
in the Borough of Manhattan, The City of New York, or at such other offices or
agencies as the Company may designate (each a "Conversion Agent"), provided,
further, that if this Security or portion hereof has been called for redemption
on a Redemption Date or is repurchasable on a Repurchase Date occurring, in
either case, during the period from the close of business on any Regular Record
Date next preceding any Interest Payment Date to the opening of business on such
succeeding Interest Payment Date and is surrendered for conversion during such
period, then the Holder of this Security on such Regular Record Date will be
entitled to receive the interest accruing hereon from the Interest Payment Date
next preceding the date of such conversion to such succeeding Interest Payment
Date and the Holder of this Security who converts this Security or a portion
hereof during such period shall not be required to pay such interest upon
surrender of this Security for conversion. Subject to the provisions of the
preceding sentence and, in the case of a conversion after the close of business
on the Regular Record Date next preceding any Interest Payment Date and on or
before the close of business on such Interest Payment Date, to the right of the
Holder of this Security (or any Predecessor Security of record as of such
Regular Record Date) to receive the related installment of interest to the
extent and under the circumstances provided in the Indenture, no cash payment or
adjustment is to be made on conversion for interest accrued hereon from the
Interest Payment Date next preceding the day of conversion, or for dividends on
the Common Stock issued on conversion hereof. The Company shall thereafter
deliver to the Holder the fixed number of shares of Common Stock (together with
any cash adjustment, as provided in the Indenture) into which this Security is
convertible and such delivery will be deemed to satisfy the Company's obligation
to pay the principal amount of this Security. No fractions of shares or scrip
representing fractions of shares will be issued on conversion, but instead of
any fractional interest (calculated to the nearest 1/100th of a share) the
Company shall pay a cash adjustment as provided in the Indenture. The Conversion
Rate is subject to adjustment as provided in the Indenture. In addition, the
Indenture provides that in case of certain consolidations or mergers to which
the Company is a party (other than a consolidation or merger that does not
result in any reclassification, conversion, exchange or cancellation of the
Common Stock) or the conveyance, transfer, sale or lease of all or substantially
all of the property and assets of the Company, the Indenture shall be amended,
without the consent of any Holders of Securities, so that this Security, if then
Outstanding, will be convertible thereafter, during the period this Security
shall be convertible as specified above, only into the kind and amount of
securities, cash and other property receivable upon such consolidation, merger,
conveyance, transfer, sale or lease by a holder of the number of shares of
Common Stock of the Company into which this Security could have been converted
immediately prior to such consolidation, merger, conveyance, transfer, sale or
lease (assuming such holder of Common Stock is not a Constituent Person or an
Affiliate of a Constituent Person, failed to exercise any rights of election and
received per share the kind and amount received per share by a plurality
<PAGE>

                                     -29-

of Non-electing Shares). No adjustment in the Conversion Rate will be made until
such adjustment would require an increase or decrease of at least one percent of
such rate, provided that any adjustment that would otherwise be made will be
carried forward and taken into account in the computation of any subsequent
adjustment.

          If this Security is a Registrable Security (as defined in this
Indenture), then the Holder of this Security [if this security is a global
security, then insert -- (including any Person that has a beneficial interest in
this Security)] and the Common Stock of the Company issuable upon conversion
hereof is entitled to the benefits of a Registration Rights Agreement, dated as
of December 12, 2000, executed by the Company and the Subsidiary Guarantor (the
"Registration Rights Agreement").  Pursuant to the Registration Rights
Agreement, the Company and the Subsidiary Guarantor have agreed for the benefit
of the Holders from time to time of the Registrable Securities that they will,
at their expense, (a) within 90 days after the Issue Date file a shelf
registration statement (the "Shelf Registration Statement") with the Commission
with respect to resales of the Registrable Securities, (b) use all reasonable
efforts to cause such Shelf Registration Statement to be declared effective by
the Commission within 180 days after the Issue Date of the Securities, provided,
however, that the Company may, upon written notice to all the Holders, postpone
having the Shelf Registration Statement declared effective for a reasonable
period not to exceed 90 days if the Company possesses material non-public
information, the disclosure of which would have a material adverse effect on the
Company and its subsidiaries taken as a whole, and (c) use all reasonable
efforts to maintain such Shelf Registration Statement effective under the
Securities Act of 1933, as amended, until the second annual anniversary of the
date it is declared effective or such earlier date as is provided in the
Registration Rights Agreement (the "Effectiveness Period").  The Company will be
permitted to suspend the use of the prospectus which is part of the Shelf
Registration Statement during certain periods of time as provided in the
Registration Rights Agreement.

          If (i) on or prior to 90 days following the Issue Date, a Shelf
Registration Statement has not been filed with the Commission, or (ii) on or
prior to the 180th day following the Issue Date, such Shelf Registration
Statement is not declared effective (each, a "Registration Default"), additional
interest ("Liquidated Damages") will accrue on this Restricted Security from and
including the day following such Registration Default to but excluding the day
on which such Registration Default has been cured.  Liquidated Damages will be
paid semi-annually in arrears, with the first semi-annual payment due on the
first Interest Payment Date, as applicable, in respect of the Restricted
Securities following the date on which such Liquidated Damages begin to accrue,
and will accrue at a rate per annum equal to an additional one-quarter of one
percent (0.25%) of the principal amount of the Restricted Securities to and
including the 90th day following such Registration Default and at a rate per
annum equal to one-half of one percent (0.50%) thereof from and after the 91st
day following such Registration Default.  Pursuant to the Registration Rights
Agreement, in the event that the Shelf Registration Statement ceases to be
effective (or the Holders of Registrable Securities are otherwise
<PAGE>

                                     -30-

prevented or restricted by the Company from effecting sales pursuant thereto)
(an "Effective Failure") during the Effectiveness Period for more than 45 days,
whether or not consecutive, during any 90-day period or for more than 90 days,
whether or not consecutive, during any 12-month period, then the interest rate
borne by the Restricted Securities shall increase by an additional one-half of
one percent (0.50%) per annum from the 46th day of the applicable 90-day period
or the 91st day of the applicable 12-month period until the earlier of (A) such
time as the Effective Failure is cured or (B) the Effectiveness Period expires.

          Whenever in this Security there is a reference, in any context, to the
payment of the principal of, premium, if any, or interest on, or in respect of,
any Security, such mention shall be deemed to include mention of the payment of
Liquidated Damages payable as described in the preceding paragraph to the extent
that, in such context, Liquidated Damages are, were or would be payable in
respect of such Security and express mention of the payment of Liquidated
Damages (if applicable) in any provisions of this Security shall not be
construed as excluding Liquidated Damages in those provisions of this Security
where such express mention is not made.

          [If this Security is a Registrable Security and the Holder of this
Security [if this security is a global security, then insert -- (including any
Person that has a beneficial interest in this Security)] elects to sell this
Security pursuant to the Shelf Registration Statement then, by its acceptance
hereof, such Holder of this Security agrees to be bound by the terms of the
Registration Rights Agreement relating to the Registrable Securities which are
the subject of such election.]

          If a Change in Control occurs, the Holder of this Security, at the
Holder's option, shall have the right, in accordance with the provisions of the
Indenture, to require the Company to repurchase this Security (or any portion of
the principal amount hereof that is at least $1,000 or an integral multiple of
$1,000 in excess thereof, provided that the portion of the principal amount of
this Security to be Outstanding after such repurchase is at least equal to
$1,000) for cash at a Repurchase Price equal to 100% of the principal amount
thereof plus interest accrued to the Repurchase Date.  At the option of the
Company, the Repurchase Price may be paid in cash or, subject to the conditions
provided in the Indenture, by delivery of shares of Common Stock having a fair
market value equal to the Repurchase Price.  For purposes of this paragraph, the
fair market value of shares of Common Stock shall be determined by the Company
and shall be equal to 95% of the average of the Closing Prices Per Share for the
five consecutive Trading Days immediately preceding and including the third
Trading Day prior to the Repurchase Date.  Whenever in this Security there is a
reference, in any context, to the principal of any Security as of any time, such
reference shall be deemed to include reference to the Repurchase Price payable
in respect of such Security to the extent that such Repurchase Price is, was or
would be so payable at such time, and express mention of the Repurchase Price in
any provision of this Security shall not be construed as excluding the
Repurchase
<PAGE>

                                     -31-

Price so payable in those provisions of this Security when such express mention
is not made; provided, however, that, for the purposes of the second succeeding
paragraph, such reference shall be deemed to include reference to the Repurchase
Price only to the extent the Repurchase Price is payable in cash.

          [The following paragraph shall appear in each Global Security:

          In the event of a deposit or withdrawal of an interest in this
Security, including an exchange, transfer, redemption, repurchase or conversion
of this Security in part only, the Trustee, as custodian of the Depositary,
shall make an adjustment on its records to reflect such deposit or withdrawal in
accordance with the Applicable Procedures.]

          [The following paragraph shall appear in each Security that is not a
Global Security:

          In the event of redemption, repurchase or conversion of this Security
in part only, a new Security or Securities for the unredeemed, unrepurchased or
unconverted portion hereof will be issued in the name of the Holder hereof.]

          The indebtedness evidenced by this Security is, to the extent and in
the manner provided in the Indenture, subordinate and subject in right of
payment to the prior payment in full of all Senior Debt of the Company, and this
Security is issued subject to such provisions of the Indenture with respect
thereto.  Each Holder of this Security, by accepting the same, (a) agrees to and
shall be bound by such provisions, (b) authorizes and directs the Trustee on his
behalf to take such action as may be necessary or appropriate to effectuate the
subordination so provided and (c) appoints the Trustee his attorney-in-fact for
any and all such purposes.

          If an Event of Default shall occur and be continuing, the principal of
all the Securities, together with accrued interest to the date of declaration,
may be declared due and payable in the manner and with the effect provided in
the Indenture.  Upon payment (i) of the amount of principal so declared due and
payable, together with accrued interest to the date of declaration, and (ii) of
interest on any overdue principal and, to the extent permitted by applicable
law, overdue interest, all of the Company's obligations in respect of the
payment of the principal of and interest on the Securities shall terminate.

          The Indenture permits, with certain exceptions as therein provided,
the amendment thereof and the modification of the rights and obligations of the
Company and the rights of the Holders of the Securities under the Indenture at
any time by the Company and the Trustee with either (a) the written consent of
the Holders of not less than a majority in aggregate principal amount of the
Securities at the time Outstanding, or (b) by the adoption of a resolution, at a
meeting of Holders of the Outstanding Securities at which a quorum is present,
by the Holders of at least 66-2/3% in aggregate principal amount of the
Outstanding Securities
<PAGE>

                                     -32-

represented at such meeting. The Indenture also contains provisions permitting
the Holders of specified percentages in principal amount of the Securities at
the time Outstanding, on behalf of the Holders of all the Securities, to waive
compliance by the Company with certain provisions of the Indenture and certain
past defaults under the Indenture and their consequences. Any such consent or
waiver by the Holder of this Security shall be conclusive and binding upon such
Holder and upon all future Holders of this Security and of any Security issued
in exchange therefore or in lieu hereof whether or not notation of such consent
or waiver is made upon this Security or such other Security.

          As provided in and subject to the provisions of the Indenture, the
Holder of this Security shall not have the right to institute any proceeding
with respect to the Indenture or for the appointment of a receiver or trustee or
for any other remedy thereunder, unless such Holder shall have previously given
the Trustee written notice of a continuing Event of Default and the Holders of
not less than 25% in aggregate principal amount of the Outstanding Securities
shall have made written request to the Trustee to institute proceedings in
respect of such Event of Default as Trustee and offered the Trustee reasonable
indemnity, and the Trustee shall not have received from the Holders of a
majority in aggregate principal amount of the Securities outstanding a direction
inconsistent with such request and shall have failed to institute any such
proceeding for 60 days after receipt of such notice, request and offer of
indemnity.  The foregoing shall not apply to any suit instituted by the Holder
of this Security for the enforcement of any payment of principal hereof,
premium, if any, or interest (including Liquidated Damages) hereon on or after
the respective due dates expressed herein or for the enforcement of the right to
convert this Security as provided in the Indenture.

          No reference herein to the Indenture and no provision of this Security
or of the Indenture shall alter or impair the obligation of the Company, which
is absolute and unconditional, to pay the principal of, premium, if any, and
interest (including Liquidated Damages) on this Security at the times, places
and rate, and in the coin or currency, herein prescribed or to convert this
Security as provided in the Indenture.

          As provided in the Indenture and subject to certain limitations
therein set forth, the transfer of this Security is registrable on the Security
Register upon surrender of this Security for registration of transfer at the
Corporate Trust Office of the Trustee or at such other office or agency of the
Company as may be designated by it for such purpose in the Borough of Manhattan,
The City of New York (which shall initially be an office or agency of the
Trustee), or at such other offices or agencies as the Company may designate,
duly endorsed by, or accompanied by a written instrument of transfer in form
satisfactory to the Company and the Security Registrar duly executed by, the
Holder thereof or his attorney duly authorized in writing, and thereupon one or
more new Securities, of authorized denominations and for the same aggregate
principal amount, will be issued to the designated transferee or transferees by
the Registrar.  No service charge shall be made for any such registration of
transfer or ex-
<PAGE>

                                     -33-

change, but the Company may require payment of a sum sufficient to recover any
tax or other governmental charge payable in connection therewith.

          Prior to due presentation of a this Security for registration of
transfer, the Company, the Trustee and any agent of the Company or the Trustee
may treat the Person in whose name such Security is registered, as the owner
thereof for all purposes, whether or not such Security be overdue, and neither
the Company, the Trustee nor any such agent shall be affected by notice to the
contrary.

          No recourse for the payment of the principal (and premium, if any) or
interest on this Security and no recourse under or upon any obligation, covenant
or agreement of the Company in the Indenture or any indenture supplemental
thereto or in any Security, or because of the creation of any indebtedness
represented thereby, shall be had against any incorporator, stockholder,
employee, agent, officer or director or subsidiary, as such, past, present or
future, of the Company or of any successor corporation, either directly or
through the Company or any successor corporation, whether by virtue of any
constitution, statute or rule of law or by the enforcement of any assessment or
penalty or otherwise, all such liability being, by the acceptance hereof and as
part of consideration for the issue hereof, expressly waived and released.

          THE INDENTURE, THE GUARANTEE AND THIS SECURITY SHALL BE GOVERNED BY
AND CONSTRUED IN ACCORDANCE WITH THE LAWS OF THE STATE OF NEW YORK, UNITED
STATES OF AMERICA, WITHOUT REGARD TO THE PRINCIPLES OF CONFLICTS OF LAWS.

          All terms used in this Security which are defined in the Indenture
shall have the meanings assigned to them in the Indenture.
<PAGE>

                                     -34-

                                 ABBREVIATIONS

          The following abbreviations, when used in the inscription on the face
of this Security, shall be construed as though they were written out in full
according to applicable laws or regulations:

<TABLE>
<S>           <C>                                   <C>                     <C>
TEN COM       as tenant in common                   UNIF GIFT MIN ACT       _________ Custodian _______
                                                                              (Cust)            (Minor)
TEN ENT       as tenants by the entireties (cust)                           under Uniform Gifts to
                                                                            Minors Act _____________
                                                                                                (State)
JT TEN        as joint tenants with right of
              survivorship and not as tenants in
              common
</TABLE>

                 Additional abbreviations may also be used though not in the
                 above list.
<PAGE>

                                     -35-

                             SUBORDINATED GUARANTEE

          AmeriSource Corporation (the "Subsidiary Guarantor") has
unconditionally guaranteed on a subordinated basis (such guarantee by the
Subsidiary Guarantor being referred to herein as the "Guarantee") (i) the due
and punctual payment of the principal of and interest on the Securities, subject
to any applicable grace period, whether at maturity, by acceleration or
otherwise, and the due and punctual payment of interest on the overdue principal
and interest, if any, on the Securities, to the extent lawful, all in accordance
with the terms set forth in Article XIV of the Indenture, and (ii) in case of
any extension of time of payment or renewal of any Securities or any of such
other obligations, that the same will be promptly paid in full when due or
performed in accordance with the terms of the extension or renewal, whether at
stated maturity, by acceleration or otherwise.

          The obligations of the Subsidiary Guarantor to the Holders and to the
Trustee pursuant to the Guarantee and the Indenture are expressly set forth and
are expressly subordinated and subject in right of payment to the prior payment
in full in cash or cash equivalents of all Guarantor Senior Debt of the
Subsidiary Guarantor, to the extent and in the manner provided in Article XIV of
the Indenture, and reference is hereby made to such Indenture for the precise
terms of the Guarantee therein made.  This Guarantee is limited under the
Indenture to the extent necessary not to constitute a fraudulent conveyance.

          No past, present or future stockholder, officer, director, employee or
incorporator, as such, of the Subsidiary Guarantor shall have any liability
under the Guarantee by reason of such person's status as stockholder, officer,
director, employee or incorporator.  Each holder of a Security by accepting a
Security waives and releases all such liability.  The waiver and release are
part of the consideration for the issuance of the Guarantee.
<PAGE>

                                     -36-

          The Guarantee shall not be valid or obligatory for any purpose until
the certificate of authentication on the Securities upon which the Guarantee is
noted shall have been executed by the Trustee under the Indenture by the manual
signature of one of its authorized officers.

                                        AMERISOURCE CORPORATION

                                        By: _________________________________
                                            Name:
                                            Title:
<PAGE>

                                     -37-

                    ELECTION OF HOLDER TO REQUIRE REPURCHASE

          (1)    Pursuant to Section 15.1 of the Indenture, the undersigned
hereby elects to have this Security repurchased by the Company.

          (2)    The undersigned hereby directs the Trustee or the Company to
pay it or an amount in cash or, at the Company's election, Common Stock valued
as set forth in the Indenture, equal to 100% of the principal amount to be
repurchased (as set forth below), plus interest accrued to the Repurchase Date,
as provided in the Indenture.

Dated:

_______________________________
_______________________________
Signature(s)

Signature(s) must be guaranteed by an Eligible
Guarantor Institution with membership in an
approved signature guarantee program pursuant
to Rule 17Ad-15 under the Securities Exchange
Act of 1934.

_______________________________
Signature Guaranteed

Principal amount to be repurchased (at least
$1,000 or an integral multiple of $1,000
in excess thereof): __________________

Remaining principal amount following such
repurchase (not less than $1,000):

_______________

NOTICE: The signature to the foregoing election must correspond to the name as
written upon the face of this Security in every particular, without alteration
or any change whatsoever.
<PAGE>

                                     -38-

SECTION 2.3         Form of Certificate of Authentication.
                    -------------------------------------

               The Trustee's certificate of authentication shall be in
substantially the following form:

               This is one of the Securities referred to in the within-mentioned
Indenture.

Dated:  _____________

                                             BANK ONE TRUST COMPANY, N.A.,
                                             as Trustee

                                             By: _______________________________
                                                 Authorized Signatory

SECTION 2.4         Form of Conversion Notice.
                    -------------------------

                               CONVERSION NOTICE

               The undersigned Holder of this Security hereby irrevocably
exercises the option to convert this Security, or any portion of the principal
amount hereof (which is $1,000 or an integral multiple of $1,000 in excess
thereof, provided that the unconverted portion of such principal amount is
$1,000 or any integral multiple of $1,000 in excess thereof) below designated,
into shares of Common Stock in accordance with the terms of the Indenture
referred to in this Security, and directs that such shares, together with a
check in payment for any fractional share and any Securities representing any
unconverted principal amount hereof, be delivered to and be registered in the
name of the undersigned unless a different name has been indicated below. If
shares of Common Stock or Securities are to be registered in the name of a
Person other than the undersigned, (a) the undersigned will pay all transfer
taxes payable with respect thereto and (b) signatures must be guaranteed by an
Eligible Guarantor Institution with membership in an approved signature
guarantee program pursuant to Rule 17Ad-15 under the Securities Exchange Act of
1934. Any amount required to be paid by the undersigned on account of interest
accompanies this Security.

Dated: _______________             ____________________________________
                                                Signature(s)

If shares or Securities are to be registered in the
name of a Person other than the Holder, please
print such Person's name and address:
<PAGE>

                                     -39-

___________________________________________
(Name)

___________________________________________
___________________________________________
(Address)

___________________________________________
Social Security or other Identification
Number, if any

____________________________________
[Signature Guaranteed]

If only a portion of the Securities is to be converted, please indicate:

1.   Principal amount to be converted: $

2.   Principal amount and denomination of Securities representing unconverted
     principal amount to be issued:

          Amount: $_________             Denominations: $______________

($1,000 or any integral multiple of $1,000 in excess thereof, provided that the
unconverted portion of such principal amount is $1,000 or any integral multiple
of $1,000 in excess thereof)

SECTION 2.5         Form of Assignment.
                    ------------------

               For value received _________________ hereby sell(s), assign(s)
and transfer(s) unto ___________________ (Please insert social security or other
identifying number of assignee) the within Security, and hereby irrevocably
constitutes and appoints _______________ as attorney to transfer the said
Security on the books of the Company, with full power of substitution in the
premises.

Dated:  ____________              ____________________________________

                                             ___________________________________
                                             Signature(s)

                                             Signature(s) must be guaranteed by
                                             an Eligible Guarantor Institution
                                             with membership in an approved
                                             signature
<PAGE>

                                     -40-

                                             guarantee program pursuant to Rule
                                             17Ad-15 under the Securities
                                             Exchange Act of 1934.

                                             ___________________________________
                                             Signature Guaranteed
<PAGE>

                                    -41-

                                  ARTICLE III

                                THE SECURITIES

SECTION 3.1    Title and Terms.
               ---------------

          The aggregate principal amount of Securities which may be
authenticated and delivered under this Indenture is limited to $250,000,000 (or
$300,000,000 if the Over-allotment Option set forth in Section 2 of the Purchase
Agreement is exercised in full (the "Over-allotment Option")), except for
Securities authenticated and delivered pursuant to Section 3.4, 3.5, 3.6, 8.5,
12.2 or 15.3(5) in exchange for, or in lieu of, other Securities previously
authenticated and delivered under this Indenture.

          The Securities shall be known and designated as the "5% Convertible
Subordinated Notes due December 1, 2007" of the Company. Their Stated Maturity
shall be December 1, 2007 and they shall bear interest on their principal amount
from December 12, 2000, payable semi-annually in arrears on June 1 and December
1 in each year, commencing June 1, 2001, at the rate of 5% per annum until the
principal thereof is due and at the rate of 5% per annum on any overdue
principal and, to the extent permitted by law, on any overdue interest;
provided, however, that payments shall only be made on a Business Day as
provided in Section 1.12.

          The principal of, premium, if any, and interest on the Securities
shall be payable as provided in the form of Securities set forth in Section 2.2,
and the Repurchase Price, whether payable in cash or in shares of Common Stock,
shall be payable at such places as are identified in the Company Notice given
pursuant to Section 15.3 (any city in which any Paying Agent is located being
herein called a "Place of Payment").

          The Registrable Securities are entitled to the benefits of a
Registration Rights Agreement as provided by Section 10.11 and in the form of
Security set forth in Section 2.2. The Securities are entitled to the payment of
Liquidated Damages as provided by Section 10.11.

          The Securities shall be redeemable at the option of the Company at any
time on or after December 3, 2004, in whole or in part, subject to the
conditions and as otherwise provided in Article XI and in the form of Security
set forth in Section 2.2.

          The Securities shall be convertible as provided in Article XII (any
city in which any Conversion Agent is located being herein called a "Place of
Conversion").
<PAGE>

                                     -42-

          The Securities shall be subordinated in right of payment to Senior
Debt of the Company as provided in Article XIII.

          The Securities shall be subject to repurchase by the Company at the
option of the Holders as provided in Article XV.

SECTION 3.2    Denominations.
               -------------

          The Securities shall be issuable only in registered form, without
coupons, in denominations of $1,000 and integral multiples of $1,000 in excess
thereof.

SECTION 3.3    Execution, Authentication, Delivery and Dating.
               ----------------------------------------------

          The Securities shall be executed on behalf of the Company by its
Chairman of the Board, its Vice Chairman of the Board, its Chief Executive
officer, its President, its Chief Operating Officer, one of its Senior Vice
Presidents or one of its Vice Presidents, with or without a corporate seal
reproduced thereon, and attested by its Chief Financial Officer, Treasurer or
Assistant Treasurer, Secretary or one of its Assistant Secretaries. Any such
signature may be manual or facsimile.

          Securities bearing the manual or facsimile signature of individuals
who were at any time the proper officers of the Company shall bind the Company,
notwithstanding that such individuals or any of them have ceased to hold such
offices prior to the authentication and delivery of such Securities or did not
hold such offices at the date of such Securities.

          At any time and from time to time after the execution and delivery of
this Indenture, the Company may deliver Securities executed by the Company to
the Trustee or to its order for authentication, together with a Company Order
for the authentication and delivery of such Securities, and the Trustee in
accordance with such Company Order shall authenticate and make available for
delivery such Securities as provided in this Indenture.

          Each Security shall be dated the date of its authentication.

          No Security shall be entitled to any benefit under this Indenture or
be valid or obligatory for any purpose unless there appears on such Security a
certificate of authentication substantially in the form provided for herein
executed by the Trustee by manual signature of an authorized signatory, and such
certificate upon any Security shall be conclusive evidence, and the only
evidence, that such Security has been duly authenticated and delivered
hereunder.
<PAGE>

                                     -43-

SECTION 3.4    Global Securities; Non-global Securities; Book-entry Provisions.
               ---------------------------------------------------------------

            (1)    Global Securities.
                   -----------------

            (i)    Each Global Security authenticated under this Indenture shall
be registered in the name of the Depositary designated by the Company for such
Global Security or a nominee thereof and delivered to such Depositary or a
nominee thereof or custodian therefor, and each such Global Security shall
constitute a single Security for all purposes of this Indenture.

            (ii)   Except for exchanges of Global Securities for definitive non-
global Securities at the sole discretion of the Company, no Global Security may
be exchanged in whole or in part for Securities registered, and no transfer of a
Global Security in whole or in part may be registered, in the name of any Person
other than the Depositary for such Global Security or a nominee thereof unless
(A) such Depositary (i) has notified the Company that it is unwilling or unable
to continue as Depositary for such Global Security or (ii) has ceased to be a
clearing agency registered as such under the Exchange Act or announces an
intention permanently to cease business or does in fact do so or (B) there shall
have occurred and be continuing an Event of Default with respect to such Global
Security. In such event, if a successor Depositary for such Global Security is
not appointed by the Company within 90 days after the Company receives such
notice or becomes aware of such ineligibility, the Company will execute, and the
Trustee, upon receipt of an Officers' Certificate directing the authentication
and delivery of Securities, will authenticate and deliver, Securities, in any
authorized denominations in an aggregate principal amount equal to the principal
amount of such Global Security in exchange for such Global Security.

            (iii)  If any Global Security is to be exchanged for other
Securities or canceled in whole, it shall be surrendered by or on behalf of the
Depositary or its nominee to the Trustee, as Security Registrar, for exchange or
cancellation, as provided in this Article III. If any Global Security is to be
exchanged for other Securities or canceled in part, or if another Security is to
be exchanged in whole or in part for a beneficial interest in any Global
Security, in each case, as provided in Section 3.5 hereof, then either (A) such
Global Security shall be so surrendered for exchange or cancellation, as
provided in this Article III, or (B) the principal amount thereof shall be
reduced or increased by an amount equal to the portion thereof to be so
exchanged or canceled, or equal to the principal amount of such other Security
to be so exchanged for a beneficial interest therein, as the case may be, by
means of an appropriate adjustment made on the records of the Trustee, as
Security Registrar, whereupon the Trustee, in accordance with the Applicable
Procedures, shall instruct the Depositary or its authorized representative to
make a corresponding adjustment to its records. Upon any such surrender or
adjustment of a Global Security, the Trustee shall, subject to Section 3.5(3)
and as otherwise provided in this Article III, authenticate and deliver any
Securities issuable in exchange for
<PAGE>

                                     -44-

such Global Security (or any portion thereof) to or upon the order of, and
registered in such names as may be directed by, the Depositary or its authorized
representative. Upon the request of the Trustee in connection with the
occurrence of any of the events specified in the preceding paragraph, the
Company shall promptly make available to the Trustee a reasonable supply of
Securities that are not in the form of Global Securities. The Trustee shall be
entitled to rely upon any order, direction or request of the Depositary or its
authorized representative which is given or made pursuant to this Article III if
such order, direction or request is given or made in accordance with the
Applicable Procedures.

            (iv)   Every Security authenticated and delivered upon registration
of transfer of, or in exchange for or in lieu of, a Global Security or any
portion thereof, whether pursuant to this Article III or otherwise, shall be
authenticated and delivered in the form of, and shall be, a registered Global
Security, unless such Security is registered in the name of a Person other than
the Depositary for such Global Security or a nominee thereof, in which case such
Security shall be authenticated and delivered in definitive fully registered
form without interest coupons.

            (v)    The Depositary or its nominee, as registered owner of a
Global Security, shall be the Holder of such Global Security for all purposes
under this Indenture and the Securities, and owners of beneficial interests in a
Global Security shall hold such interests pursuant to the Applicable Procedures.
Accordingly, any such owner's beneficial interest in a Global Security will be
shown only on, and the transfer of such interest shall be effected only through,
records maintained by the Depositary or its nominee or its Agent Members and
such owners of beneficial interests in a Global Security will not be considered
the owners or holders thereof.

            (2)    Non-global Securities.  Securities issued upon the events
                   ---------------------
described in Section 3.4(l)(ii) shall be in definitive fully registered form,
without interest coupons, and shall bear the Restricted Securities Legend if and
as required by this Indenture.

SECTION 3.5    Registration; Registration of Transfer and Exchange; Restrictions
               on Transfer.
               -----------------------------------------------------------------

            (1)    The Company shall cause to be kept at the Corporate Trust
Office of the Trustee a register (the register maintained in such office
referred to as the "Security Register") in which, subject to such reasonable
regulations as it may prescribe, the Company shall provide for the registration
of Securities and of transfers of Securities. The Trustee is hereby appointed
"Security Registrar" for the purpose of registering Securities and transfers and
exchanges of Securities as herein provided.

            Upon surrender for registration of transfer of any Security at an
office or agency of the Company designated pursuant to Section 10.2 for such
purpose, the Company shall execute, and the Trustee shall authenticate and
deliver, in the name of the designated transferee or transferees, one or more
new Securities of any authorized denominations and of a
<PAGE>

                                     -45-

like aggregate principal amount and bearing such restrictive legends as may be
required by this Indenture.

            At the option of the Holder, and subject to the other provisions of
this Section 3.5, Securities may be exchanged for other Securities of any
authorized denomination and of a like aggregate principal amount, upon surrender
of the Securities to be exchanged at any such office or agency.  Whenever any
Securities are so surrendered for exchange, and subject to the other provisions
of this Section 3.5, the Company shall execute, and the Trustee shall
authenticate and deliver, the Securities which the Holder making the exchange is
entitled to receive.  Every Security presented or surrendered for registration
of transfer or for exchange shall (if so required by the Company or the Security
Registrar) be duly endorsed or be accompanied by a written instrument of
transfer in form satisfactory to the Company, the Trustee and the Security
Registrars, duly executed by the Holder thereof or his attorney duly authorized
in writing.

            All Securities issued upon any registration of transfer or exchange
of Securities shall be the valid obligations of the Company, evidencing the same
debt and entitled to the same benefits under this Indenture as the Securities
surrendered upon such registration of transfer or exchange.

            No service charge shall be made to a Holder for any registration of
transfer or exchange of Securities except as provided in Section 3.6, but the
Company may require payment of a sum sufficient to cover any tax or other
governmental charge that may be imposed in connection with any registration of
transfer or exchange of Securities, other than exchanges pursuant to Section
3.4, 8.5, 12.2 or 15.3 (other than where the shares of Common Stock are to be
issued or delivered in a name other than that of the Holder of the Security) not
involving any transfer and other than any stamp and other duties, if any, which
may be imposed in connection with any such transfer or exchange by the United
States or any political subdivision thereof or therein, which shall be paid by
the Company.

            In the event of a redemption of the Securities, neither the Company
nor the Securities Registrar will be required (a) to register the transfer of or
exchange Securities for a period of 15 days immediately preceding the date
notice is given identifying the serial numbers of the Securities called for such
redemption or (b) to register the transfer of or exchange Securities, or
portions thereof, called for redemption.

            (2)    Certain Transfers and Exchanges.  Notwithstanding any other
                   -------------------------------
provision of this Indenture or the Securities, transfers and exchanges of
Securities and beneficial interests in a Global Security of the kinds specified
in this Section 3.5(2) shall be made only in accordance with this Section
3.5(2).

            (i)    Restricted Global Security to Restricted Non-global Security.
                   ------------------------------------------------------------
In the event that non-global Securities are to be issued pursuant to Section
3.4(l)(ii) in connection
<PAGE>

                                     -46-

with any transfer of Securities, such transfer may be effected only in
accordance with the provisions of this Section 3.5(2)(i) and subject to the
Applicable Procedures. Upon receipt by the Trustee, as Security Registrar, of
(A) a Company Order from the Company directing the Trustee, as Security
Registrar, to (x) authenticate and deliver one or more Securities of the same
aggregate principal amount as the beneficial interest in the Restricted Global
Security to be transferred, such instructions to contain the name or names of
the designated transferee or transferees, the authorized denomination or
denominations of the Securities to be so issued and appropriate delivery
instructions and (y) decrease the beneficial interest of a specified Agent
Member's account in a Restricted Global Security by a specified principal amount
not greater than the principal amount of such Restricted Global Security, and
(B) such other certifications, legal opinions or other information as the
Company or the Trustee may reasonably require to confirm that such transfer is
being made pursuant to an exemption from, or in a transaction not subject to,
the registration requirements of the Securities Act, then the Trustee, as
Security Registrar, shall decrease the principal amount of the Restricted Global
Security by the specified amount and authenticate and deliver Securities in
accordance with such instructions from the Company as provided in Section
3.4(1)(iii).

            (ii)   Restricted Non-global Security to Restricted Global Security.
                   ------------------------------------------------------------
If the Holder of a Restricted Security (other than a Global Security) wishes at
any time to transfer all or any portion of such Restricted Security to a Person
who wishes to take delivery thereof in the form of a beneficial interest in the
Restricted Global Security, such transfer may be effected only in accordance
with the provisions of this Section 3.5(2)(ii) and subject to the Applicable
Procedures. Upon receipt by the Trustee, as Security Registrar, of (A) such
Restricted Security as provided in Section 3.5(l) and instructions from the
Company directing that a beneficial interest in the Restricted Global Security
in a specified principal amount not greater than the principal amount of such
Security be credited to a specified Agent Member's account and (B) a Restricted
Securities Certificate, satisfactory to the Trustee and duly executed by such
Holder or his attorney duly authorized in writing, then the Trustee, as Security
Registrar, shall cancel such Restricted Security (and issue a new Restricted
Security in respect of any untransferred portion thereof) as provided in Section
3.5(1) and increase the principal amount of the Restricted Global Security by
the specified principal amount as provided in Section 3.4(l)(iii).

            (iii)  Exchanges Between Global Security and Non-global Security.  A
                   ---------------------------------------------------------
beneficial interest in a Global Security may be exchanged for a Security that is
not a Global Security only as provided in Section 3.4 or only if such exchange
occurs in connection with a transfer effected in accordance with Section
3.5(2)(i) above, provided that, if such interest is a beneficial interest in the
Restricted Global Security, then such interest shall be exchanged for a
Restricted Security (subject in each case to Section 3.5(3)). A Security that is
not a Global Security may be exchanged for a beneficial interest in a Global
Security only if such exchange occurs in connection with a transfer effected in
accordance with Section 3.5(2)(ii) above.
<PAGE>

                                     -47-

            (3)    Securities Act Legends. All Securities issued pursuant to
                   ----------------------
this Indenture, and all Successor Securities, shall bear the Restricted
Securities Legend, subject to the following:

            (i)    subject to the following Clauses of this Section 3.5(3), a
     Security or any portion thereof which is exchanged, upon transfer or
     otherwise, for a Global Security or any portion thereof shall bear the
     Restricted Securities Legend borne by such Global Security for which the
     Security was exchanged;

            (ii)   subject to the following Clauses of this Section 3.5(3), a
     new Security which is not a Global Security and is issued in exchange for
     another Security (including a Global Security) or any portion thereof, upon
     transfer or otherwise, shall bear the Restricted Securities Legend borne by
     the Security for which the new Security was exchanged;

            (iii)  any Securities which are sold or otherwise disposed of
     pursuant to an effective registration statement under the Securities Act
     (including the Shelf Registration Statement), together with their Successor
     Securities, shall not bear a Restricted Securities Legend.  The Company
     shall inform the Trustee in writing of the effective date of any such
     registration statement registering the Securities under the Securities Act
     and shall notify the Trustee at any time when prospectuses must be
     delivered with respect to Securities to be sold pursuant to such
     registration statement.  The Trustee shall not be liable for any action
     taken or omitted to be taken by it in good faith in accordance with the
     aforementioned registration statement;

            (iv)   at any time after the Securities may be freely transferred
     without registration under the Securities Act or without being subject to
     transfer restrictions pursuant to the Securities Act, a new Security which
     does not bear a Restricted Securities Legend may be issued in exchange for
     or in lieu of a Security (other than a Global Security) or any portion
     thereof which bears such a legend if the Trustee has received an
     Unrestricted Securities Certificate satisfactory to the Trustee and duly
     executed by the Holder of such Security bearing a Restricted Securities
     Legend or his attorney duly authorized in writing, and after such date and
     receipt of such certificate, the Trustee shall authenticate and deliver
     such new Security in exchange for or in lieu of such other Security as
     provided in this Article III;

            (v)    a new Security which does not bear a Restricted Securities
     Legend may be issued in exchange for or in lieu of a Security or any
     portion thereof which bears such a legend if, in the Company's judgment,
     placing such a legend upon such new Security is not necessary to ensure
     compliance with the registration requirements of the Securities Act, and
     the Trustee, at the direction of the Company, shall authenticate and
     deliver such a new Security as provided in this Article III; and
<PAGE>

                                     -48-

            (vi)   notwithstanding the foregoing provisions of this Section
     3.5(3), a Successor Security of a Security that does not bear a Restricted
     Securities Legend shall not bear such legend unless the Company has
     reasonable cause to believe that such Successor Security is a "restricted
     security" within the meaning of Rule 144, in which case the Trustee, at the
     direction of the Company, shall authenticate and deliver a new Security
     bearing a Restricted Securities Legend in exchange for such Successor
     Security as provided in this Article III.

            (4)    Any stock certificate representing shares of Common Stock
issued upon conversion of the Securities shall bear the Restricted Securities
Legend borne by such Securities, to the extent required by this Indenture,
unless such shares of Common Stock have been sold pursuant to a registration
statement that has been declared effective under the Securities Act (and which
continues to be effective at the time of such transfer) or sold pursuant to Rule
144(k) of the Securities Act, or unless otherwise agreed by the Company in
writing with written notice thereof to the transfer agent for the Common Stock.
With respect to the transfer of shares of Common Stock issued upon conversion of
the Securities that are restricted hereunder, any deliveries of certificates,
legal opinions or other instruments that would be required to be made to the
Security Registrar in the case of a transfer of Securities, as described above,
shall instead be made to the transfer agent for the Common Stock.

            (5)    Neither the Trustee, the Paying Agent nor any of their agents
shall (i) have any duty to monitor compliance with or with respect to any
federal or state or other securities or tax laws or (ii) have any duty to obtain
documentation on any transfers or exchanges other than as specifically required
hereunder.

SECTION 3.6    Mutilated, Destroyed, Lost or Stolen Securities.
               -----------------------------------------------

            If any mutilated Security is surrendered to the Trustee, the Company
shall execute and the Trustee shall authenticate and deliver in exchange
therefor a new Security of like tenor and principal amount and bearing a number
not contemporaneously outstanding.

            If there be delivered to the Company and to the Trustee:

            (1)    evidence to their satisfaction of the destruction, loss or
     theft of any Security, and

            (2)    such security or indemnity as may be satisfactory to the
     Company and the Trustee to save each of them and any agent of either of
     them from harm, then, in the absence of actual notice to the Company or the
     Trustee that such Security has been acquired by a bona fide purchaser, the
     Company shall execute and the Trustee shall authenticate and deliver, in
     lieu of any such destroyed, lost or stolen Security, a new
<PAGE>

                                     -49-

     Security of like tenor and principal amount and bearing a number not
     contemporaneously outstanding.

          In case any such mutilated, destroyed, lost or stolen Security has
become or is about to become due and payable, the Company in its discretion, but
subject to any conversion rights, may, instead of issuing a new Security,
repurchase such Security, upon satisfaction of the conditions set forth in the
preceding paragraph.

          Upon the issuance of any new Security under this Section 3.6, the
Company may require the payment of a sum sufficient to cover any tax or other
governmental charge that may be imposed in relation thereto (other than any
stamp and other duties, if any, which may be imposed in connection therewith by
the United States or any political subdivision thereof or therein, which shall
be paid by the Company) and any other expenses (including the fees and expenses
of the Trustee) connected therewith.

          Every new Security issued pursuant to this Section 3.6 in lieu of any
mutilated, destroyed, lost or stolen Security shall constitute an original
additional contractual obligation of the Company, whether or not the mutilated,
destroyed, lost or stolen Security shall be at any time enforceable by anyone,
and such new Security shall be entitled to all the benefits of this Indenture
equally and proportionately with any and all other Securities duly issued
hereunder.

          The provisions of this Section 3.6 are exclusive and shall preclude
(to the extent lawful) all other rights and remedies of any Holder with respect
to the replacement or payment of mutilated, destroyed, lost or stolen
Securities.

SECTION 3.7    Payment of Interest; Interest Rights Preserved.
               ----------------------------------------------

          Interest on any Security which is payable, and is punctually paid or
duly provided for, on any Interest Payment Date shall be paid to the Person in
whose name that Security (or one or more Predecessor Securities) is registered
at the close of business on the Regular Record Date for such interest.

          Any interest on any Security which is payable, but is not punctually
paid or duly provided for, on any Interest Payment Date (herein called
"Defaulted Interest") shall forthwith cease to be payable to the Holder on the
relevant Regular Record Date by virtue of having been such Holder, and such
Defaulted Interest may be paid by the Company, at its election in each case, as
provided in Clause (1) or (2) below:

          (1)    The Company may elect to make payment of any Defaulted
     Interest to the Persons in whose names the Securities (or their respective
     Predecessor Securities) are registered at the close of business on a
     Special Record Date for the payment of such Defaulted Interest, which shall
     be fixed in the following manner. The Company
<PAGE>

                                     -50-

     shall notify the Trustee in writing of the amount of Defaulted Interest
     proposed to be paid on each Security, the date of the proposed payment and
     the Special Record Date, and at the same time the Company shall deposit
     with the Trustee an amount of money equal to the aggregate amount proposed
     to be paid in respect of such Defaulted Interest or shall make arrangements
     satisfactory to the Trustee for such deposit prior to the date of the
     proposed payment, such money when deposited to be held in trust for the
     benefit of the Persons entitled to such Defaulted Interest as provided in
     this Clause. The Special Record Date for the payment of such Defaulted
     Interest shall be not more than 15 days and not less than 10 days prior to
     the date of the proposed payment and not less than 10 days after the
     receipt by the Trustee of the notice of the proposed payment. The Trustee,
     in the name and at the expense of the Company, shall cause notice of the
     proposed payment of such Defaulted Interest and the Special Record Date
     therefor to be mailed, first-class postage prepaid, to each Holder at such
     Holder's address as it appears in the Security Register, not less than 10
     days prior to such Special Record Date. Notice of the proposed payment of
     such Defaulted Interest and the Special Record Date therefor having been so
     mailed, such Defaulted Interest shall be paid to the Persons in whose names
     the Securities (or their respective Predecessor Securities) are registered
     at the close of business on such Special Record Date and shall no longer be
     payable pursuant to the following Clause (2).

            (2)    The Company may make payment of any Defaulted Interest in any
     other lawful manner not inconsistent with the requirements of any
     securities exchange on which the Securities may be listed, and upon such
     notice as may be required by such exchange, if, after notice given by the
     Company to the Trustee of the proposed payment pursuant to this Clause,
     such manner of payment shall be deemed practicable by the Trustee.

            Subject to the foregoing provisions of this Section and Section 3.5,
each Security delivered under this Indenture upon registration of transfer of,
or in exchange for, or in lieu of any other Security shall carry the rights to
interest accrued and unpaid, and to accrue, which were carried by such other
Security.

            Interest on any Security which is converted in accordance with
Section 12.2 during a Record Date Period shall be payable in accordance with the
provisions of Section 12.2.

SECTION 3.8    Persons Deemed Owners.
               ---------------------

            Prior to due presentment of a Security for registration of transfer,
the Company, the Trustee, any Paying Agent, and any agent of the Company, the
Trustee or any Paying Agent, may treat the Person in whose name such Security is
registered as the owner of such Security for the purpose of receiving payment of
principal of, premium, if any, and (subject to
<PAGE>

                                     -51-

Section 3.7) interest on such Security and for all other purposes whatsoever,
whether or not such Security be overdue, and neither the Company, the Trustee,
any Paying Agent nor any agent of the Company, the Trustee or any Paying Agent
shall be affected by notice to the contrary.

SECTION 3.9    Cancellation.
               ------------

            All Securities surrendered for payment, redemption, repurchase,
registration of transfer or exchange or conversion shall, if surrendered to any
Person other than the Trustee, be delivered to the Trustee. All Securities so
delivered to the Trustee shall be canceled promptly by the Trustee (or its
agent). No Securities shall be authenticated in lieu of or in exchange for any
Securities canceled as provided in this Section 3.9. The Trustee shall dispose
of all canceled Securities in accordance with applicable law and its customary
practices in effect from time to time.

SECTION 3.10   Computation of Interest.
               -----------------------

            Interest on the Securities (including any Liquidated Damages) shall
be computed on the basis of a 360-day year of twelve 30-day months.

SECTION 3.11   CUSIP Numbers.
               -------------

            The Company in issuing Securities may use "CUSIP" numbers (if then
generally in use) in addition to serial numbers; if so, the Trustee shall use
such CUSIP numbers in addition to serial numbers in notices of redemption and
repurchase as a convenience to Holders; provided that any such notice may state
that no representation is made as to the correctness of such CUSIP numbers
either as printed on the Securities or as contained in any notice of a
redemption or repurchase and that reliance may be placed only on the serial or
other identification numbers printed on the Securities, and any such redemption
or repurchase shall not be affected by any defect in or omission of such CUSIP
numbers.

                                  ARTICLE IV

                          SATISFACTION AND DISCHARGE

SECTION 4.1    Satisfaction and Discharge of Indenture.
               ---------------------------------------

            This Indenture shall upon Company Request cease to be of further
effect (except as to any surviving rights of conversion, or registration of
transfer or exchange, or replacement of Securities herein expressly provided for
and any right to receive Liquidated Damages as provided in Section 10.11 and in
the form of Securities set forth in Section 2.2 and the
<PAGE>

                                     -52-

Company's obligations to the Trustee pursuant to Section 6.7), and the Trustee,
at the expense of the Company, shall execute proper instruments in form and
substance satisfactory to the Trustee acknowledging satisfaction and discharge
of this Indenture, when

            (1)    either

                   (i)   all Securities theretofore authenticated and delivered
          (other than (A) Securities which have been destroyed, lost or stolen
          and which have been replaced or paid as provided in Section 3.6 and
          (B) Securities for whose payment money has theretofore been deposited
          in trust or segregated and held in trust by the Company and thereafter
          repaid to the Company or discharged from such trust, as provided in
          Section 10.3) have been delivered to the Trustee for cancellation; or

                   (ii)  all such Securities not theretofore delivered to the
          Trustee or its agent for cancellation (other than Securities referred
          to in clauses (A) and (B) of clause (1)(i) above)

                         (a)  have become due and payable, or

                         (b)  will have become due and payable at their Stated
                   Maturity within one year, or

                         (c)  are to be called for redemption within one year
                   under arrangements satisfactory to the Trustee for the giving
                   of notice of redemption by the Trustee in the name, and at
                   the expense, of the Company, and the Company, in the case of
                   clause (a), (b) or (c) above, has deposited or caused to be
                   deposited with the Trustee as trust funds (immediately
                   available to the Holders in the case of clause (a)) in trust
                   for the purpose an amount in cash sufficient to pay and
                   discharge the entire indebtedness on such Securities not
                   theretofore delivered to the Trustee for cancellation, for
                   principal, premium, if any, and interest (including any
                   Liquidated Damages) to the date of such deposit (in the case
                   of Securities which have become due and payable) or to the
                   Stated Maturity or Redemption Date, as the case may be;

            (2)    the Company has paid or caused to be paid all other sums
     payable hereunder by the Company; and

            (3)    the Company has delivered to the Trustee an Officers'
     Certificate and an opinion of Counsel, each stating that all conditions
     precedent herein provided for relating to the satisfaction and discharge of
     this Indenture have been complied with.
<PAGE>

                                     -53-

            Notwithstanding the satisfaction and discharge of this Indenture,
the obligations of the Company to the Trustee under Section 6.7, the obligations
of the Company to any Authenticating Agent under Section 6.12, the obligations
of the Trustee under Section 4.2 and the last paragraph of Section 10.3 and the
obligations of the Company and the Trustee under Section 3.5 and Article XII
shall survive. Funds held in trust pursuant to this Section are not subject to
the provisions of Article XIII.

SECTION 4.2    Application of Trust Money.
               --------------------------

            Subject to the provisions of the last paragraph of Section 10.3, all
money deposited with the Trustee pursuant to Section 4.1 and in accordance with
the provisions of Article XIII shall be held in trust for the sole benefit of
the Holders and not be subject to the subordination provisions of Article XIII,
and such monies shall be applied by the Trustee, in accordance with the
provisions of the Securities and this Indenture, to the payment, either directly
or through any Paying Agent, to the Persons entitled thereto, of the principal,
premium, if any, and interest for whose payment such money has been deposited
with the Trustee.

            All moneys deposited with the Trustee pursuant to Section 4.1 (and
held by it or any Paying Agent) for the payment of Securities subsequently
converted shall be returned to the Company upon Company Request.

            The Company shall pay and indemnify the Trustee against any tax, fee
or other charge imposed or assessed against all money deposited with the Trustee
pursuant to Section 4.1 (other than income taxes and franchise taxes incurred or
payable by the Trustee and such other taxes, fees or charges incurred or payable
by the Trustee that are not directly the result of the deposit of such money
with the Trustee).

                                   ARTICLE V

                                   REMEDIES

SECTION 5.1    Events of Default.
               -----------------

            "Event of Default", wherever used herein, means any one of the
following events (whatever the reason for such Event of Default and whether it
shall be occasioned by the provisions of Article XIII or be voluntary or
involuntary or be effected by operation of law or pursuant to any judgment,
decree or order of any court or any order, rule or regulation of any
administrative or governmental body):
<PAGE>

                                     -54-

            (1)    default in the payment of the principal of or premium, if
     any, on any Security at its Maturity, whether or not such payment is
     prohibited by the subordination provisions of the Securities or of this
     Indenture; or

            (2)    default in the payment of any interest (including any
     Liquidated Damages) on any Security when it becomes due and payable, and
     continuance of such default for a period of 30 days, whether or not such
     payment is prohibited by the subordination provisions of the Securities or
     of this Indenture; or

            (3)    failure by the Company to give a Company Notice in accordance
     with Section 15.3 whether or not such Company Notice is prohibited by the
     subordination provisions of the Securities or this Indenture; or

            (4)    default in the performance, or breach, of any covenant or
     warranty of the Company in this Indenture (other than a covenant or
     warranty a default in the performance or breach of which is specifically
     dealt with elsewhere in this Section), and continuance of such default or
     breach for a period of 60 days after there has been given, by registered or
     certified mail, to the Company by the Trustee or to the Company and the
     Trustee by the Holders of at least 25% in principal amount of the
     Outstanding Securities a written notice specifying such default or breach
     and requiring it to be remedied and stating that such notice is a "Notice
     of Default" hereunder; or

            (5)    any indebtedness under any bonds, debentures, notes or other
     evidences of indebtedness for money borrowed (or guarantee thereof) by the
     Company or any Significant Subsidiary or under any mortgage, indenture or
     instrument under which there may be issued or by which there may be secured
     or evidenced any indebtedness for money borrowed by the Company or any
     Significant Subsidiary (an "Instrument") with an aggregate principal amount
     in excess of $15,000,000, whether such indebtedness now exists or shall
     hereafter be created, is not paid at final maturity of any Instrument
     (either at its stated maturity or upon acceleration thereof), and such
     indebtedness is not discharged, or such acceleration is not rescinded or
     annulled, within a period of 30 days after there shall have been given, by
     registered or certified mail, to the Company by the Trustee or to the
     Company and the Trustee by the Holders of at least 25% in aggregate
     principal amount of the Outstanding Securities a written notice specifying
     such default and requiring the Company to cause such indebtedness to be
     discharged or cause such default to be cured or waived or such acceleration
     to be rescinded or annulled and stating that such notice is a "Notice of
     Default" hereunder; or

            (6)    the entry by a court having jurisdiction in the premises of
     (A) a decree or order for relief in respect of the Company or any
     Significant Subsidiary in an involuntary case or proceeding under any
     applicable Federal or State bankruptcy, insolvency, reorganization or other
     similar law or (B) a decree or order adjudging the Com-
<PAGE>

                                     -55-

     pany or any Significant Subsidiary a bankrupt or insolvent, or approving as
     properly filed a petition seeking reorganization, arrangement, adjustment
     or composition of or in respect of the Company or any Significant
     Subsidiary under any applicable Federal or State law, or appointing a
     custodian, receiver, liquidator, assignee, trustee, sequestrator or other
     similar official of the Company or any Significant Subsidiary or of any
     substantial part of the property of either, or ordering the winding up or
     liquidation of its affairs, and the continuance of any such decree or order
     for relief or any such other decree or order unstayed and in effect for a
     period of 60 consecutive days; or

            (7)    the commencement by the Company or any Significant Subsidiary
     of a voluntary case or proceeding under any applicable Federal or State
     bankruptcy, insolvency, reorganization or other similar law or of any other
     case or proceeding to be adjudicated a bankrupt or insolvent, or the
     consent by either to the entry of a decree or order for relief in respect
     of the Company or any Significant Subsidiary in an involuntary case or
     proceeding under any applicable Federal or State bankruptcy, insolvency,
     reorganization or other similar law or to the commencement of any
     bankruptcy or insolvency case or proceeding against either, or the filing
     by either of a petition or answer or consent seeking reorganization or
     similar relief under any applicable Federal or State law, or the consent by
     either to the filing of such petition or to the appointment of or taking
     possession by a custodian, receiver, liquidator, assignee, trustee,
     sequestrator or other similar official of the Company or any Significant
     Subsidiary or of any substantial part of the property of either, or the
     making by either of an assignment for the benefit of creditors, or the
     admission by either in writing of its inability to pay its debts generally
     as they become due, or the taking of corporate action by the Company or any
     Significant Subsidiary in furtherance of any such action; or

            (8)    except as otherwise provided by this Indenture, the Guarantee
     shall, for any reason, cease to be, or be asserted in writing by the
     Guarantor or the Company not to be, in full force and effect and
     enforceable in accordance with its terms.

SECTION 5.2    Acceleration of Maturity; Rescission and Annulment.
               --------------------------------------------------

            If an Event of Default (other than an Event of Default specified in
Section 5.1(6) or 5.1(7) with respect to the Company) occurs and is continuing,
then in every such case the Trustee or the Holders of not less than 25% in
aggregate principal amount of the Outstanding Securities may, subject to the
provisions of Article XIII, declare the principal of all the Securities to be
due and payable immediately, by a notice in writing to the Company (and to the
Trustee if given by the Holders), and upon any such declaration such principal
and all accrued interest thereon shall become immediately due and payable.  If
an Event of Default specified in Section 5.1(6) or 5.1(7) with respect to the
Company occurs, the principal of, and accrued interest on, all the Securities
shall, subject to the provisions of Article XIII, ipso facto
<PAGE>

                                     -56-

become immediately due and payable without any declaration or other Act of the
Holders or any act on the part of the Trustee.

            At any time after such declaration of acceleration has been made and
before a judgment or decree for payment of the money due has been obtained by
the Trustee as hereinafter provided in this Article V, the Holders of a majority
in aggregate principal amount of the Outstanding Securities, by written notice
to the Company and the Trustee, may, on behalf of all Holders, rescind and annul
such declaration and its consequences if:

            (1)    the Company has paid or deposited with the Trustee a sum
     sufficient to pay

                   (i)    all overdue interest on all Securities,

                   (ii)   the principal of and premium, if any, on any
          Securities which have become due otherwise than by such declaration of
          acceleration and any interest thereon at the rate borne by the
          Securities,

                   (iii)  to the extent permitted by applicable law, interest
          upon overdue interest at a rate of 5% per annum, and

                   (iv)   all sums paid or advanced by the Trustee hereunder and
          the reasonable compensation, expenses, disbursements and advances of
          the Trustee, its agents and counsel;

          (2)      all Events of Default, other than the nonpayment of the
     principal of and any premium and interest on, Securities which have become
     due solely by such declaration of acceleration, have been cured or waived
     as provided in Section 5.13; and

          (3)      such rescission and annulment would not violate any judgment
     or decree issued in appropriate judicial proceedings regarding the payment
     by the Trustee to the Holders of the amounts referred to in 5.2(l).

          No rescission or annulment referred to above shall affect any
subsequent default or impair any right consequent thereon.

SECTION 5.3    Collection of Indebtedness and Suits for Enforcement by Trustee.
               ---------------------------------------------------------------

            The Company covenants that if:

            (1)    default is made in the payment of any interest (including any
     Liquidated Damages) on any Security when it becomes due and payable and
     such default continues for a period of 30 days, or
<PAGE>

                                     -57-

            (2)    default is made in the payment of the principal of or
     premium, if any, on any Security at the Maturity thereof,

the Company will, upon demand of the Trustee but subject to the provisions of
Article XIII pay to it, for the benefit of the Holders of such Securities the
whole amount then due and payable on such Securities for principal and interest
(including any Liquidated Damages) and interest on any overdue principal and
premium, if any, and, to the extent permitted by applicable law, on any overdue
interest (including any Liquidated Damages), at a rate of 5% per annum, and in
addition thereto, such further amount as shall be sufficient to cover the
reasonable costs and expenses of collection, including the reasonable
compensation, expenses, disbursements and advances of the Trustee, its agents
and counsel.

            If the Company fails to pay such amounts forthwith upon such demand,
the Trustee, in its own name and as trustee of an express trust, may institute a
judicial proceeding for the collection of the sums so due and unpaid, may
prosecute such proceeding to judgment or final decree and may enforce the same
against the Company or any other obligor upon the Securities and collect the
moneys adjudged or decreed to be payable in the manner provided by law out of
the property of the Company, the Subsidiary Guarantor or any other obligor upon
the Securities, wherever situated.

            If an Event of Default occurs and is continuing, the Trustee may in
its discretion proceed to protect and enforce its rights and the rights of the
Holders of Securities by such appropriate judicial proceedings as the Trustee
shall deem most effectual to protect and enforce any such rights, whether for
the specific enforcement of any covenant or agreement in this Indenture or in
aid of the exercise of any power granted herein, or to enforce any other proper
remedy.

SECTION 5.4    Trustee May File Proofs of Claim.
               --------------------------------

            In case of the pendency of any receivership, insolvency,
liquidation, bankruptcy, reorganization, arrangement, adjustment, composition or
other judicial proceeding relative to the Company, the Subsidiary Guarantor or
any other obligor upon the Securities or the property of the Company, the
Subsidiary Guarantor or of such other obligor or the creditors of either, the
Trustee (irrespective of whether the principal of, and any interest on, the
Securities shall then be due and payable as therein expressed or by declaration
or otherwise and irrespective of whether the Trustee shall have made any demand
on the Company for the payment of overdue principal or interest) shall be
entitled and empowered, by intervention in such proceeding or otherwise,

            (1)    to file and prove a claim for the whole amount of principal,
     premium, if any, and interest owing and unpaid in respect of the Securities
     and take such other actions, including participating as a member, voting or
     otherwise, of any official commit-
<PAGE>

                                     -58-

     tee of creditors appointed in such matter, and to file such other papers or
     documents, in each of the foregoing cases, as may be necessary or advisable
     in order to have the claims of the Trustee (including any claim for the
     reasonable compensation, expenses, disbursements and advances of the
     Trustee, its agents and counsel) and of the Holders of Securities allowed
     in such judicial proceeding, and

            (2)    to collect and receive any moneys or other property payable
     or deliverable on any such claim and to distribute the same;

and any custodian, receiver, assignee, trustee, liquidator, sequestrator or
other similar official in any such judicial proceeding is hereby authorized by
each Holder of Securities to make such payments to the Trustee and, in the event
that the Trustee shall consent to the making of such payments directly to the
Holders of Securities to pay to the Trustee any amount due to it for the
reasonable compensation, expenses, disbursements and advances of the Trustee,
its agents and counsel and any other amounts due the Trustee under Section 6.7.

            Nothing herein contained shall be deemed to authorize the Trustee to
authorize or consent to or accept or adopt on behalf of any Holder of a Security
any plan of reorganization, arrangement, adjustment or composition affecting the
Securities or the rights of any Holder thereof or to authorize the Trustee to
vote in respect of the claim of any Holder of a Security in any such proceeding;
provided, however, that the Trustee may, on behalf of such Holders, vote for the
election of a trustee in bankruptcy or similar official and be a member of a
creditors' or other similar committee.

SECTION 5.5    Trustee May Enforce Claims Without Possession of Securities.
               -----------------------------------------------------------

            All rights of action and claims under this Indenture or the
Securities may be prosecuted and enforced by the Trustee without the possession
of any of the Securities or the production thereof in any proceeding relating
thereto, and any such proceeding instituted by the Trustee shall be brought in
its own name as trustee of an express trust, and any recovery of judgment shall,
after provision for the payment of the reasonable compensation, expenses,
disbursements and advances of the Trustee, its agents and counsel, be for the
ratable benefit of the Holders of the Securities in respect of which judgment
has been recovered.

SECTION 5.6    Application of Money Collected.
               ------------------------------

            Subject to Article XIII, any money collected by the Trustee pursuant
to this Article V shall be applied in the following order, at the date or dates
fixed by the Trustee and, in case of the distribution of such money on account
of principal, premium, if any, or interest, upon presentation of the Securities
and the notation thereon of the payment if only partially paid and upon
surrender thereof if fully paid:
<PAGE>

                                     -59-

            FIRST:  To the payment of all amounts due the Trustee under Section
     6.7;

            SECOND:  To the payment of the amounts then due and unpaid for
     principal of, premium, if any, or interest (including Liquidated Damages,
     if any) on, the Securities in respect of which or for the benefit of which
     such money has been collected, ratably, without preference or priority of
     any kind, according to the amounts due and payable on such Securities for
     principal, premium, if any, and interest (including Liquidated Damages, if
     any), respectively; and

            THIRD:  Any remaining amounts shall be repaid to the Company.

SECTION 5.7    Limitation on Suits.
               -------------------

            No Holder of any Security shall have any right to institute any
proceeding, judicial or otherwise, with respect to this Indenture, or for the
appointment of a receiver or trustee, or for any other remedy hereunder, unless:

            (1)    such Holder has previously given written notice to the
     Trustee of a continuing Event of Default;

            (2)    the Holders of not less than 25% in aggregate principal
     amount of the Outstanding Securities shall have made written request to the
     Trustee to institute proceedings in respect of such Event of Default in its
     own name as Trustee hereunder;

            (3)    such Holder or Holders have offered to the Trustee, and if
     requested, shall have provided, reasonable indemnity against the costs,
     expenses and liabilities to be incurred in compliance with such request;

            (4)    the Trustee for 60 days after its receipt of such notice,
     request and offer of indemnity (or if requested, receipt of indemnity) has
     failed to institute any such proceeding; and

            (5)    no direction inconsistent with such written request has been
     given to the Trustee during such 60 day period by the Holders of a majority
     in aggregate principal amount of the Outstanding Securities;

it being understood and intended that no one or more of such Holders shall have
any right in any manner whatever by virtue of, or by availing of, any provision
of this Indenture to affect, disturb or prejudice the rights of any other of
such Holders, or to obtain or seek to obtain priority or preference over any
other of such Holders or to enforce any right under this Indenture, except in
the manner herein provided and for the equal and ratable benefit of all such
Holders.
<PAGE>

                                     -60-

SECTION 5.8    Unconditional Right of Holders to Receive Principal, Premium and
               ----------------------------------------------------------------

               Interest and to Convert.
               ------------------------

            Notwithstanding any other provision in this Indenture, but subject
to the provisions of Article XIII, the Holder of any Security shall have the
right, which is absolute and unconditional, to receive payment of the principal
of, premium, if any, and (subject to Section 3.7) interest (including Liquidated
Damages, if any) on such Security on the respective Stated Maturities expressed
in such Security (or, in the case of redemption or repurchase, on the Redemption
Date or Repurchase Date, as the case may be), and to convert such Security in
accordance with Article XII, and to institute suit for the enforcement of any
such payment and right to convert, and such rights shall not be impaired without
the consent of such Holder.

SECTION 5.9    Restoration of Rights and Remedies.
               ----------------------------------

            If the Trustee or any Holder of a Security has instituted any
proceeding to enforce any right or remedy under this Indenture and such
proceeding has been discontinued or abandoned for any reason, or has been
determined adversely to the Trustee or to such Holder, then and in every such
case, subject to any determination in such proceeding, the Company, the Trustee
and the Holders of Securities shall be restored severally and respectively to
their former positions hereunder and thereafter all rights and remedies of the
Trustee and such Holders shall continue as though no such proceeding had been
instituted.

SECTION 5.10   Rights and Remedies Cumulative.
               ------------------------------

            Except as otherwise provided with respect to the replacement or
payment of mutilated, destroyed, lost or stolen Securities in the last paragraph
of Section 3.6, no right or remedy herein conferred upon or reserved to the
Trustee or to the Holders of Securities is intended to be exclusive of any other
right or remedy, and every right and remedy shall, to the extent permitted by
law, be cumulative and in addition to every other right and remedy given
hereunder or now or hereafter existing at law or in equity or otherwise.  The
assertion or employment of any right or remedy hereunder, or otherwise, shall
not prevent the concurrent assertion or employment of any other appropriate
right or remedy.

SECTION 5.11   Delay or Omission Not Waiver.
               ----------------------------

            No delay or omission of the Trustee or of any Holder of any Security
to exercise any right or remedy accruing upon any Event of Default shall impair
any such right or remedy or constitute a waiver of any such Event of Default or
any acquiescence therein.  Every right and remedy given by this Article V or by
law to the Trustee or to the Holders of Securities may be exercised from time to
time, and as often as may be deemed expedient, by the Trustee or (subject to the
limitations contained in this Indenture) by the Holders of Securities as the
case may be.
<PAGE>

                                     -61-

SECTION 5.12  Control by Holders of Securities.
              --------------------------------

          Subject to Section 6.3, the Holders of a majority in aggregate
principal amount of the Outstanding Securities shall have the right to direct
the time, method and place of conducting any proceeding for any remedy available
to the Trustee or exercising any trust or power conferred on the Trustee,
provided that

          (1)  such direction shall not be in conflict with any rule of law
     or with this Indenture, and

          (2)  the Trustee may take any other action deemed proper by the
     Trustee which is not inconsistent with such direction, and

          (3)  the Trustee need not take any action which might involve it in
     personal liability or be unjustly prejudicial to the Holders of Securities
     not consenting.

SECTION 5.13  Waiver of Past Defaults.
              -----------------------

          The Holders, either (i) through the written consent of not less than a
majority in aggregate principal amount of the Outstanding Securities or (ii) by
the adoption of a resolution, at a meeting of Holders of the Outstanding
Securities at which a quorum is present, by the Holders of at least 66-2/3% in
aggregate principal amount of the Outstanding Securities represented at such
meeting, may on behalf of the Holders of all the Securities waive any past
default hereunder and its consequences, except a default (A) in the payment of
the principal of, premium, if any, or interest (including Liquidated Damages) on
any Security, or (B) in respect of a covenant or provision hereof which under
Article VIII cannot be modified or amended without the consent of the Holder of
each Outstanding Security affected.

          Upon any such waiver, such default shall cease to exist, and any Event
of Default arising therefrom shall be deemed to have been cured, for every
purpose of this Indenture; but no such waiver shall extend to any subsequent or
other default or impair any right consequent thereon.

SECTION 5.14  Undertaking for Costs.
              ---------------------

          All parties to this Indenture agree, and each Holder of any Security
by his acceptance thereof shall be deemed to have agreed, that any court may in
its discretion require, in any suit for the enforcement of any right or remedy
under this Indenture, or any suit against the Trustee for any action taken,
suffered or omitted by it as Trustee, the filing by any party litigant in such
suit of an undertaking to pay the costs of such suit, and that such court may in
its discretion assess reasonable costs, including reasonable attorneys' fees,
against any party litigant in such suit, having due regard to the merits and
good faith of the claims or defenses made
<PAGE>

                                     -62-

by such party litigant; but the provisions of this Section 5.14 shall not apply
to any suit instituted by the Company, to any suit instituted by the Trustee, to
any suit instituted by any Holder, or group of Holders, holding in the aggregate
more than 10% in principal amount of the Outstanding Securities, or to any suit
instituted by any Holder of any Security for the enforcement of the payment of
the principal of, premium, if any, or interest on any Security on or after the
respective Stated Maturity or Maturities expressed in such Security (or, in the
case of redemption or repurchase, on or after the Redemption Date or Repurchase
Date, as the case may be) or for the enforcement of the right to convert any
Security in accordance with Article XII.

SECTION 5.15  Waiver of Stay, Usury or Extension Laws.
              ---------------------------------------

          The Company covenants (to the extent that it may lawfully do so) that
it will not at any time insist upon, or plead, or in any manner whatsoever claim
or take the benefit or advantage of, any stay, usury or extension law wherever
enacted, now or at any time hereafter in force, which may affect the covenants
or the performance of this Indenture; and the Company (to the extent that it may
lawfully do so) hereby expressly waives all benefit or advantage of any such law
and covenants that it will not hinder, delay or impede by reason of such law the
execution of any power herein granted to the Trustee, but will suffer and permit
the execution of every such power as though no such law had been enacted.

                                  ARTICLE VI

                                  THE TRUSTEE

SECTION 6.1   Certain Duties and Responsibilities.
              -----------------------------------

          (1)  Except during the continuance of an Event of Default,

          (i)  the Trustee undertakes to perform such duties and only such
     duties as are specifically set forth in this Indenture, and no implied
     covenants or obligations shall be read into this Indenture against the
     Trustee; and

          (ii) in the absence of bad faith on its part, the Trustee may
     conclusively rely, as to the truth of the statements and the correctness of
     the opinions expressed therein, upon certificates or opinions furnished to
     the Trustee and conforming to the requirements of this Indenture, but in
     the case of any such certificates or opinions which by any provision hereof
     are specifically required to be furnished to the Trustee, the Trustee shall
     be under a duty to examine the same to determine whether or not they
     conform to the requirements of this Indenture, but not to verify the
     contents thereof.
<PAGE>

                                     -63-

          (2)   In case an Event of Default has occurred and is continuing, the
Trustee shall exercise such of the rights and powers vested in it by this
Indenture, and use the same degree of care and skill in their exercise, as a
prudent man would exercise or use under the circumstances in the conduct of his
own affairs.

          (3)   No provision of this Indenture shall be construed to relieve the
Trustee from liability for its own negligent action, its own negligent failure
to act, or its own willful misconduct, except that

          (i)   this paragraph (3) shall not be construed to limit the effect of
     paragraph (1) of this Section;

          (ii)  the Trustee shall not be liable for any error of judgment made
     in good faith by a Responsible Officer, unless it shall be proved that the
     Trustee was negligent in ascertaining the pertinent facts;

          (iii) the Trustee shall not be liable with respect to any action taken
     or omitted to be taken by it in good faith in accordance with the direction
     of the Holders of a majority in aggregate principal amount of the
     Outstanding Securities relating to the time, method and place of conducting
     any proceeding for any remedy available to the Trustee, or exercising any
     trust or power conferred upon the Trustee, under this Indenture; and

          (iv)  no provision of this Indenture shall require the Trustee to
     expend or risk its own funds or otherwise incur any financial liability in
     the performance of any of its duties hereunder, or in the exercise of any
     of its rights or powers, if it shall have reasonable grounds for believing
     that repayment of such funds or adequate indemnity against such risk or
     liability is not reasonably assured to it.

          (4)   Whether or not therein expressly so provided, every provision of
this Indenture relating to the conduct or affecting the liability of or
affording protection to the Trustee shall be subject to the provisions of this
Section.

SECTION 6.2   Notice of Defaults.
              ------------------

          Within 90 days after the occurrence of any default hereunder as to
which a Responsible Officer of the Trustee has received written notice, the
Trustee shall give to all Holders of Securities, in the manner provided in
Section 1.6, notice of such default, unless such default shall have been cured
or waived; provided, however, that, except in the case of a default in the
payment of the principal of, premium, if any, or interest on any Security, the
Trustee shall be protected in withholding such notice if and so long as the
board of directors, the executive committee or a trust committee of directors or
Responsible Officers of the Trustee in
<PAGE>

                                     -64-

good faith determines that the withholding of such notice is in the interest of
the Holders; and provided, further, that in the case of any default of the
character specified in Section 5.1(4), no such notice to Holders of Securities
shall be given until at least 60 days after the occurrence thereof or, if
applicable, the cure period specified therein. For the purpose of this Section,
the term "default" means any event which is, or after notice or lapse of time or
both would become, an Event of Default.

SECTION 6.3   Certain Rights of Trustee.
              -------------------------

          Subject to the provisions of Section 6.1:

          (1)  the Trustee may rely, and shall be protected in acting or
     refraining from acting, upon any resolution, Officers' Certificate, other
     certificate, statement, instrument, opinion, report, notice, request,
     direction, consent, order, bond, debenture, note, coupon, other evidence of
     indebtedness or other paper or document (collectively, the "Documents")
     believed by it to be genuine and to have been signed or presented by the
     proper party or parties, and the Trustee need not investigate any fact or
     matter stated in such Documents;

          (2)  any request or direction of the Company mentioned herein shall be
     sufficiently evidenced by a Company Request or Company Order and any
     resolution of the Board of Directors shall be sufficiently evidenced by a
     Board Resolution;

          (3)  whenever in the administration of this Indenture the Trustee
     shall deem it desirable that a matter be proved or established prior to
     taking, suffering or omitting any action hereunder, the Trustee (unless
     other evidence be the one specifically prescribed) may, in the absence of
     bad faith on its part, request and rely upon an Officers' Certificate or
     Opinion of Counsel;

          (4)  the Trustee may consult with counsel of its selection and the
     advice of such counsel or any Opinion of Counsel shall be full and complete
     authorization and protection in respect of any action taken, suffered or
     omitted by it hereunder in good faith and in reliance thereon;

          (5)  the Trustee shall be under no obligation to exercise any of the
     rights or powers vested in it by this Indenture at the request or direction
     of any of the Holders of Securities pursuant to this Indenture, unless such
     Holders shall have offered, and, if requested by the Trustee, delivered, to
     the Trustee reasonable security or indemnity against the costs, expenses
     and liabilities which might be incurred by it in compliance with such
     request or direction;
<PAGE>

                                     -65-

          (6)  the Trustee shall not be bound to make any investigation into the
     facts or matters stated in any resolution, certificate, statement,
     instrument, opinion, report, notice, request, direction, consent, order,
     bond, debenture, note, coupon, other evidence of indebtedness or other
     paper or document, but the Trustee may make such further inquiry or
     investigation into such facts or matters as it may see fit, and, if the
     Trustee shall determine to make such further inquiry or investigation, it
     shall be entitled to examine the books, records and premises of the
     Company, personally or by agent or attorney; and

          (7)  the Trustee may execute any of the trusts or powers hereunder or
     perform any duties hereunder either directly or by or through agents or
     attorneys and the Trustee shall not be responsible for any misconduct or
     negligence on the part of any agent or attorney appointed with due care by
     it hereunder.

SECTION 6.4   Not Responsible for Recitals or Issuance of Securities.
              ------------------------------------------------------

          The recitals contained herein and in the Securities (except the
Trustee's certificates of authentication) shall be taken as the statements of
the Company, and the Trustee assumes no responsibility for their correctness.
The Trustee makes no representations as to the validity or sufficiency of this
Indenture, of the Securities or of the Common Stock issuable upon the conversion
of the Securities.  The Trustee shall not be accountable for the use or
application by the Company of Securities or the proceeds thereof.

SECTION 6.5   May Hold Securities, Act as Trustee Under Other Indentures.
              ----------------------------------------------------------

          The Trustee, any Authenticating Agent, any Paying Agent, any
Conversion Agent or any other agent of the Company or the Trustee, in its
individual or any other capacity, may become the owner or pledgee of Securities
and may otherwise deal with the Company with the same rights it would have if it
were not Trustee, Authenticating Agent, Paying Agent, Conversion Agent or such
other agent.

          The Trustee may become and act as trustee under other indentures under
which other securities, or certificates of interest or participation in other
securities, of the Company are outstanding in the same manner as if it were not
Trustee hereunder.

SECTION 6.6   Money Held in Trust.
              -------------------

          Money held by the Trustee in trust hereunder need not be segregated
from other funds except to the extent required by law.  The Trustee shall be
under no liability for interest on any money received by it hereunder except as
otherwise agreed in writing with the Company.
<PAGE>

                                     -66-

SECTION 6.7   Compensation and Reimbursement.
              ------------------------------

          The Company agrees

          (1)  to pay to the Trustee from time to time such reasonable
     compensation as the Company and the Trustee shall from time to time agree
     in writing for its acceptance of this Indenture and for all services
     rendered by it hereunder (which compensation shall not be limited by any
     provision of law in regard to the compensation of a trustee of an express
     trust);

          (2)  except as otherwise expressly provided herein, to reimburse the
     Trustee upon its request for all reasonable expenses, disbursements and
     advances incurred or made by the Trustee (including costs and expenses of
     enforcing this Indenture and defending itself against any claim (whether
     asserted by the Company, any Holder of Securities or any other Person) or
     liability in connection with the exercise of any of its powers or duties
     hereunder) in accordance with any provision of this Indenture (including
     the reasonable compensation and the expenses and disbursements of its
     agents and counsel), except any such expense, disbursement or advance as
     may be attributable to its negligence or bad faith; and

          (3)  to indemnify the Trustee (and its directors, officers, employees
     and agents) for, and to hold it harmless against, any loss, liability or
     expense incurred without negligence or bad faith on its part, arising out
     of or in connection with the acceptance or administration of this trust,
     including the reasonable costs, expenses and reasonable attorneys, fees of
     defending itself against any claim or liability in connection with the
     exercise or performance of any of its powers or duties hereunder.

          When the Trustee incurs expenses or renders services in connection
with an Event of Default specified in Section 5.1(6) or Section 5.1(7), the
expenses (including the reasonable charges of its counsel) and the compensation
for the services are intended to constitute expenses of the administration under
any applicable Federal or state bankruptcy, insolvency or other similar law.

          The provisions of this Section shall survive the termination of this
Indenture or the earlier resignation or removal of the Trustee.

SECTION 6.8   Corporate Trustee Required; Eligibility.
              ---------------------------------------

          There shall at all times be a Trustee hereunder which shall be a
Person that is eligible pursuant to the Trust Indenture Act to act as such,
having (or being part of a holding company group with) a combined capital and
surplus of at least $50,000,000, subject to supervision or examination by
federal or state authority, and in good standing.  The Trustee or an
<PAGE>

                                     -67-

Affiliate of the Trustee shall maintain an established place of business in the
Borough of Manhattan, The City of New York. If such corporation publishes
reports of condition at least annually, pursuant to law or to the requirements
of said supervising or examining authority, then for the purposes of this
Section, the combined capital and surplus of such corporation shall be deemed to
be its combined capital and surplus as set forth in its most recent report of
condition so published. If at any time the Trustee shall cease to be eligible in
accordance with the provisions of this Section, it shall resign immediately in
the manner and with the effect hereinafter specified in this Article and a
successor shall be appointed pursuant to Section 6.9.

SECTION 6.9   Resignation and Removal; Appointment of Successor.
              -------------------------------------------------

          (1)  No resignation or removal of the Trustee and no appointment of a
successor Trustee pursuant to this Article shall become effective until the
acceptance of appointment by the successor Trustee in accordance with the
applicable requirements of Section 6.10.

          (2)  The Trustee may resign at any time by giving written notice
thereof to the Company.  If the instrument of acceptance by a successor Trustee
required by Section 6.10 shall not have been delivered to the Trustee within 30
days after the giving of such notice of resignation, the resigning Trustee may
petition any court of competent jurisdiction for the appointment of a successor
Trustee.

          (3)  The Trustee may be removed at any time by an Act of the Holders
of a majority in aggregate principal amount of the Outstanding Securities,
delivered to the Trustee and the Company. If the instrument of acceptance by a
successor Trustee required by Section 6.10 shall not have been delivered to the
Trustee within 30 days after the giving of such notice of removal, the removed
Trustee may petition any court of competent jurisdiction for the appointment of
a successor Trustee.

          (4)  If at any time:

          (i)  the Trustee shall cease to be eligible under Section 6.8 and
     shall fail to resign after written request therefor by the Company or by
     any Holder of a Security who has been a bona fide Holder of a Security for
     at least six months, or

          (ii) the Trustee shall become incapable of acting or shall be
     adjudged a bankrupt or insolvent or a receiver of the Trustee or of its
     property shall be appointed or any public officer shall take charge or
     control of the Trustee or of its property or affairs for the purpose of
     rehabilitation, conservation or liquidation,

then, in any such case (i) the Company by a Board Resolution may remove the
Trustee, or (ii) subject to Section 5.14, any Holder of a Security who has been
a bona fide Holder of a Security for at least six months may, on behalf of
himself and all others similarly situated, petition
<PAGE>

                                     -68-

any court of competent jurisdiction for the removal of the Trustee and the
appointment of a successor Trustee.

          (5)  If the Trustee shall resign, be removed or become incapable of
acting, or if a vacancy shall occur in the office of Trustee for any cause, the
Company, by a Board Resolution, shall promptly appoint a successor Trustee and
shall comply with the applicable requirements of this Section and Section 6.10.
If, within one year after such resignation, removal or incapability, or the
occurrence of such vacancy, a successor Trustee shall be appointed by Act of the
Holders of a majority in aggregate principal amount of the Outstanding
Securities delivered to the Company and the retiring Trustee, the successor
Trustee so appointed shall, forthwith upon its acceptance of such appointment in
accordance with the applicable requirements of Section 6.10, become the
successor Trustee and supersede the successor Trustee appointed by the Company.
If no successor Trustee shall have been so appointed by the Company or the
Holders of Securities and accepted appointment in the manner required by this
Section and Section 6.10, any Holder of a Security who has been a bona fide
Holder of a Security for at least six months may, on behalf of himself and all
others similarly situated, petition any court of competent jurisdiction for the
appointment of a successor Trustee.

          (6)  The Company shall give notice of each resignation and each
removal of the Trustee and each appointment of a successor Trustee to all
Holders of Securities in the manner provided in Section 1.6. Each notice shall
include the name of the successor Trustee and the address of its Corporate Trust
Office.

SECTION 6.10   Acceptance of Appointment by Successor.
               --------------------------------------

          Every successor Trustee appointed hereunder shall execute, acknowledge
and deliver to the Company and to the retiring Trustee an instrument accepting
such appointment, and thereupon the resignation or removal of the retiring
Trustee shall become effective and such successor Trustee, without any further
act, deed or conveyance, shall become vested with all the rights, powers, trusts
and duties of the retiring Trustee; but, on the request of the Company or the
successor Trustee, such retiring Trustee shall, upon payment of its charges,
execute and deliver an instrument transferring to such successor Trustee all the
rights, powers and trusts of the retiring Trustee and shall duly assign,
transfer and deliver to such successor Trustee all property and money held by
such retiring Trustee hereunder.  Upon request of any such successor Trustee,
the Company shall execute any and all instruments for more fully and certainly
vesting in and confirming to such successor Trustee all such rights, powers and
trusts.

          No successor Trustee shall accept its appointment unless at the time
of such acceptance such successor Trustee shall be eligible under this Article.
<PAGE>

                                     -69-

SECTION 6.11   Merger, Conversion, Consolidation or Succession to Business.
               -----------------------------------------------------------

          Any corporation into which the Trustee may be merged or converted or
with which it may be consolidated, or any corporation resulting from any merger,
conversion or consolidation to which the Trustee shall be a party, or any
corporation succeeding to all or substantially all of the corporate trust
business of the Trustee (including the trust created by this Indenture), shall
be the successor of the Trustee hereunder, provided such corporation shall be
otherwise eligible under this Article, without the execution or filing of any
paper or any further act on the part of any of the parties hereto.  In case any
Securities shall have been authenticated, but not delivered, by the Trustee then
in office, any successor by merger, conversion or consolidation to such
authenticating Trustee may adopt such authentication and deliver the Securities
so authenticated with the same effect as if such successor Trustee had itself
authenticated such Securities.

SECTION 6.12   Authenticating Agents.
               ---------------------

          The Trustee may, with the consent of the Company, appoint an
Authenticating Agent or Agents acceptable to the Company with respect to the
Securities which shall be authorized to act on behalf of the Trustee to
authenticate Securities issued upon exchange or substitution pursuant to this
Indenture.

          Securities authenticated by an Authenticating Agent shall be entitled
to the benefits of this Indenture and shall be valid and obligatory for all
purposes as if authenticated by the Trustee hereunder, and every reference in
this Indenture to the authentication and delivery of Securities by the Trustee
or the Trustee's certificate of authentication shall be deemed to include
authentication and delivery on behalf of the Trustee by an Authenticating Agent
and a certificate of authentication executed on behalf of the Trustee by an
Authenticating Agent.  Each Authenticating Agent shall be subject to acceptance
by the Company and shall at all times be a corporation organized and doing
business under the laws of the United States of America, any State thereof or
the District of Columbia, authorized under such laws to act as Authenticating
Agent and subject to supervision or examination by government or other fiscal
authority.  If at any time an Authenticating Agent shall cease to be eligible in
accordance with the provisions of this Section 6.12, such Authenticating Agent
shall resign immediately in the manner and with the effect specified in this
Section 6.12.

          Any corporation into which an Authenticating Agent may be merged or
converted or with which it may be consolidated, or any corporation resulting
from any merger, conversion or consolidation to which such Authenticating Agent
shall be a party, or any corporation succeeding to the corporate agency or
corporate trust business of an Authenticating Agent, shall continue to be an
Authenticating Agent, provided such corporation shall be otherwise eligible
under this Section 6.12, without the execution or filing of any paper or any
further act on the part of the Trustee or the Authenticating Agent.
<PAGE>

                                     -70-

          An Authenticating Agent may resign at any time by giving written
notice thereof to the Trustee and to the Company.  The Trustee may at any time
terminate the agency of an Authenticating Agent by giving written notice thereof
to such Authenticating Agent and to the Company.  Upon receiving such a notice
of resignation or upon such a termination, or in case at any time such
Authenticating Agent shall cease to be eligible in accordance with the
provisions of this Section 6.12, the Trustee may appoint a successor
Authenticating Agent which shall be subject to acceptance by the Company.  Any
successor Authenticating Agent upon acceptance of its appointment hereunder
shall become vested with all the rights, powers and duties of its predecessor
hereunder, with like effect as if originally named as an Authenticating Agent.
No successor Authenticating Agent shall be appointed unless eligible under the
provisions of this Section 6.12.

          The Company agrees to pay to each Authenticating Agent from time to
time reasonable compensation for its services under this Section 6.12.

          If an Authenticating Agent is appointed with respect to the Securities
pursuant to this Section 6.12, the Securities may have endorsed thereon, in
addition to or in lieu of the Trustee's certification of authentication, an
alternative certificate of authentication in the following form:

          This is one of the Securities referred to in the within-mentioned
Indenture.

                              BANK ONE TRUST COMPANY, N.A.,
                              as Trustee

                              By:

                              ______________________________________
                              As Authenticating Agent

                              By:

                              ______________________________________
                              Authorized Signatory

SECTION 6.13   Disqualification; Conflicting Interests.
               ---------------------------------------

          If the Trustee has or shall acquire a conflicting interest within the
meaning of the Trust Indenture Act, the Trustee shall either eliminate such
interest or resign, to the extent
<PAGE>

                                     -71-

and in the manner provided by, and subject to the provisions of, the Trust
Indenture Act and this Indenture.

SECTION 6.14  Preferential Collection of Claims Against Company.
              -------------------------------------------------

          If and when the Trustee shall be or become a creditor of the Company
(or any other obligor upon the Securities), the Trustee shall be subject to the
provisions of the Trust Indenture Act regarding the collection of claims against
the Company (or any such other obligor).

                                  ARTICLE VII

              CONSOLIDATION, MERGER, CONVEYANCE, TRANSFER OR LEASE

SECTION 7.1  Company May Consolidate, Etc., Only on Certain Terms.
             ----------------------------------------------------

          The Company shall not (i) consolidate with or merge into any other
Person or convey, transfer, sell or lease all its properties and assets
substantially as an entirety to any Person, (ii) permit any Person to
consolidate with or merge into the Company, or (iii) permit any Person to
convey, transfer, sell or lease such Person's properties and assets
substantially as an entirety to the Company unless:

            (1) in the case of a transaction under clauses (i) and (ii) above,
     the Person formed by such consolidation into or with which the Company is
     merged or the Person to which the properties and assets of the Company are
     so conveyed, transferred, sold or leased shall be a corporation, limited
     liability company, partnership or trust organized and validly existing
     under the laws of the United States of America, any State thereof or the
     District of Columbia and, if other than the Company, shall expressly
     assume, by a supplemental indenture hereto, executed and delivered to the
     Trustee, in form reasonably satisfactory to the Trustee, the due and
     punctual payment of the principal of, premium, if any, and interest
     (including Liquidated Damages, if any) on all of the Securities as
     applicable, and the performance or observance of every covenant of this
     Indenture on the part of the Company to be performed or observed and shall
     have provided for conversion rights in accordance with Article XII;

            (2) immediately after giving effect to such transaction, no Event of
     Default, and no event that after notice or lapse of time or both, would
     become an Event of Default, shall have occurred and be continuing; and
<PAGE>

                                     -72-

            (3) in the case of a transaction under clauses (i) and (ii) above,
     the Company has delivered to the Trustee an Officers' Certificate and an
     Opinion of Counsel, each stating that such consolidation, merger,
     conveyance, transfer, sale or lease and, if a supplemental indenture is
     required in connection with such transaction, such supplemental indenture
     comply with this Article VII and that all conditions precedent herein
     provided for relating to such transaction have been complied with, together
     with any documents required under Section 8.3.

SECTION 7.2  Successor Substituted.
             ---------------------

          Upon any consolidation of the Company with, or merger of the Company
into any other Person or any conveyance, transfer, sale or lease of all or
substantially all the properties and assets of the Company in accordance with
Section 7.1, the successor Person formed by such consolidation or into or with
which the Company is merged or to which such conveyance, transfer, sale or lease
is made shall succeed to, and be substituted for, and may exercise every right
and power of, the Company under this Indenture with the same effect as if such
successor Person had been named as the Company herein, and thereafter, except in
the case of a lease, the predecessor Person shall be relieved of all obligations
and covenants under this Indenture and the Securities.

                                  ARTICLE VIII

                            SUPPLEMENTAL INDENTURES

SECTION 8.1  Supplemental Indentures Without Consent of Holders of Securities.
             ----------------------------------------------------------------

          Without the consent of any Holders of Securities the Company, when
authorized by a Board Resolution, and the Trustee, at any time and from time to
time, may enter into one or more indentures supplemental hereto for any of the
following purposes:

               (1) to evidence the succession of another Person to the Company
     and the assumption by any such successor of the covenants and obligations
     of the Company herein and in the Securities as permitted by Article VII of
     this Indenture; or

               (2) to add to the covenants of the Company for the benefit of the
     Holders of Securities or to surrender any right or power herein conferred
     upon the Company; or

               (3)  to secure the Securities; or
<PAGE>

                                     -73-

               (4) to make provision with respect to the conversion rights of
     Holders of Securities pursuant to Section 12.11 or to make provision with
     respect to the repurchase rights of Holders of Securities pursuant to
     Section 15.5; or

               (5) to make any changes or modifications to this Indenture
     necessary in connection with the registration of any Registrable Securities
     under the Securities Act as contemplated by Section 10.11, provided such
     action pursuant to this clause (5) shall not adversely affect the interests
     of the Holders of Securities; or

               (6) to comply with the requirements of the Trust Indenture Act or
     the rules and regulations of the Commission thereunder in order to effect
     or maintain the qualification of this Indenture under the Trust Indenture
     Act, as contemplated by this Indenture or otherwise; or

               (7) to evidence and provide for the acceptance of appointment
     hereunder by a successor Trustee; or

               (8) to make any change that would not adversely affect the
     interests of the Holders of Securities; or

               (9) to cure any ambiguity, to correct or supplement any provision
     herein which may be inconsistent with any other provision herein or which
     is otherwise defective, or to make any other provisions with respect to
     matters or questions arising under this Indenture as the Company and the
     Trustee may deem necessary or desirable, provided such action pursuant to
     this clause (9) shall not adversely affect the interests of the Holders of
     Securities in any material respect.

          Upon Company Request, accompanied by a Board Resolution authorizing
the execution of any such supplemental indenture, and subject to and upon
receipt by the Trustee of the documents described in Section 8.3 hereof, the
Trustee shall join with the Company in the execution of any supplemental
indenture authorized or permitted by the terms of this Indenture and to make any
further appropriate agreements and stipulations which may be therein contained.

SECTION 8.2  Supplemental Indentures with Consent of Holders of Securities.
             -------------------------------------------------------------

          With either (i) the written consent of the Holders of not less than a
majority in aggregate principal amount of the Outstanding Securities, by the Act
of said Holders delivered to the Company and the Trustee, or (ii) by the
adoption of a resolution, at a meeting of Holders of the Outstanding Securities
at which a quorum is present, by the Holders of at least 66-2/3% in aggregate
principal amount of the Outstanding Securities represented at such meeting, the
Company, when authorized by a Board Resolution, and the Trustee may enter into
an in-
<PAGE>

                                     -74-

denture or indentures supplemental hereto for the purpose of adding any
provisions to or changing in any manner or eliminating any of the provisions of
this Indenture or of modifying in any manner the rights of the Holders of
Securities under this Indenture; provided, however, that no such supplemental
indenture shall, without the consent or affirmative vote of the Holder of each
Outstanding Security affected thereby,

               (1) change the Stated Maturity of the principal of, or any
     installment of interest on, any Security; or

               (2) reduce the principal amount thereof or the premium, if any,
     or the rate of interest payable thereon; or

               (3) reduce the amount payable upon a redemption or mandatory
     repurchase; or

               (4) modify the provisions of Article XIV in a manner adverse to
     the Holders; or

               (5) change the place or currency of payment of the principal of,
     premium, if any, or interest on any Security (including any payment of
     Liquidated Damages or Redemption Price or Repurchase Price in respect of
     such Security); or

               (6) impair the right to institute suit for the enforcement of any
     payment in respect of any Security on or after the Stated Maturity thereof
     (or, in the case of redemption or any repurchase, on or after the
     Redemption Date or Repurchase Date, as the case may be); or

               (7) modify the obligation of the Company to maintain an office or
     agency in the Borough of Manhattan, The City of New York, pursuant to
     Section 10.2; or

               (8) modify the provisions of this Indenture with respect to the
     subordination of the Securities in a manner adverse to the Holders; or

               (9) except as permitted by Section 12.11, adversely affect the
     right of Holders to convert any Security as provided in Article XII; or

               (10) modify any of the provisions of Section 10.9; or

               (11) modify any of the provisions of this Section or Section 5.13
     or 10.12, except to increase any percentage contained herein or therein or
     to provide that certain other provisions of this Indenture cannot be
     modified or waived without the consent of the Holder of each Outstanding
     Security affected thereby; or
<PAGE>

                                     -75-

          (12) reduce the requirements of Section 9.4 for quorum or voting, or
     reduce the percentage in principal amount of the Outstanding Securities the
     consent of whose Holders is required for any such supplemental indenture or
     the consent of whose Holders is required for any waiver (of compliance with
     certain provisions of this Indenture or certain defaults hereunder and
     their consequences) provided for in this Indenture.

          It shall not be necessary for any Act of Holders of Securities under
this Section to approve the particular form of any proposed supplemental
indenture, but it shall be sufficient if such Act shall approve the substance
thereof.

SECTION 8.3  Execution of Supplemental Indentures.
             ------------------------------------

          In executing, or accepting the additional trusts created by, any
supplemental indenture permitted by this Article or the modifications thereby of
the trusts created by this Indenture, the Trustee shall be provided, and
(subject to Sections 6.1 and 6.3) shall be fully protected in relying upon, an
Opinion of Counsel and an Officers' Certificate, each stating that the execution
of such supplemental indenture is authorized or permitted by this Indenture, and
that such supplemental indenture has been duly authorized, executed and
delivered by the Company and constitutes a valid and legally binding obligation
of the Company enforceable against the Company in accordance with its terms.
The Trustee may, but shall not be obligated to, enter into any such supplemental
indenture which affects the Trustee's own rights, duties or immunities under
this Indenture or otherwise.

SECTION 8.4  Effect of Supplemental Indentures.
             ---------------------------------

          Upon the execution of any supplemental indenture under this Article,
this Indenture shall be modified in accordance therewith, and such supplemental
indenture shall form a part of this Indenture for all purposes; and every Holder
of Securities theretofore or thereafter authenticated and delivered hereunder
appertaining thereto shall be bound thereby.

SECTION 8.5  Reference in Securities to Supplemental Indentures.
             --------------------------------------------------

          Securities authenticated and delivered after the execution of any
supplemental indenture pursuant to this Article may, and shall if required by
the Trustee, bear a notation in form approved by the Trustee as to any matter
provided for in such supplemental indenture.  If the Company shall so determine,
new securities so modified as to conform, in the opinion of the Company and the
Trustee, to any such supplemental indenture may be prepared and executed by the
Company and authenticated and delivered by the Trustee in exchange for
Outstanding Securities.
<PAGE>

                                     -76-

SECTION 8.6  Notice of Supplemental Indentures.
             ---------------------------------

          Promptly after the execution by the Company and the Trustee of any
supplemental indenture pursuant to the provisions of Section 8.2, the Company
shall give notice to all Holders of Securities of such fact, setting forth in
general terms the substance of such supplemental indenture, in the manner
provided in Section 1.6. Any failure of the Company to give such notice, or any
defect therein, shall not in any way impair or affect the validity of any such
supplemental indenture.

                                   ARTICLE IX

                       MEETINGS OF HOLDERS OF SECURITIES

SECTION 9.1  Purposes for Which Meetings May Be Called.
             -----------------------------------------

          A meeting of Holders of Securities may be called at any time and from
time to time pursuant to this Article to make, give or take any request, demand,
authorization, direction, notice, consent, waiver or other action provided by
this Indenture to be made, given or taken by Holders of Securities.

SECTION 9.2  Call, Notice and Place of Meetings.
             ----------------------------------

          (1) The Trustee may at any time call a meeting of Holders of
Securities for any purpose specified in Section 9.1, to be held at such time and
at such place in the Borough of Manhattan, The City of New York, as the Trustee
shall determine.  Notice of every meeting of Holders of Securities, setting
forth the time and the place of such meeting and in general terms the action
proposed to be taken at such meeting, shall be given, in the manner provided in
Section 1.6, not less than 21 nor more than 180 days prior to the date fixed for
the meeting.

          (2) In case at any time the Company, pursuant to a Board Resolution,
or the Holders of at least 10% in principal amount of the outstanding Securities
shall have requested the Trustee to call a meeting of the Holders of Securities
for any purpose specified in Section 9.1, by written request setting forth in
reasonable detail the action proposed to be taken at the meeting, and the
Trustee shall not have mailed the notice of such meeting within 21 days after
receipt of such request or shall not thereafter proceed to cause the meeting to
be held as provided herein, then the Company or the Holders of Securities in the
amount specified, as the case may be, may determine the time and the place in
the Borough of Manhattan, The City of New York, for such meeting and may call
such meeting for such purposes by giving notice thereof as provided in paragraph
(1) of this Section.
<PAGE>

                                     -77-

SECTION 9.3  Persons Entitled to Vote at Meetings.
             ------------------------------------

          To be entitled to vote at any meeting of Holders of Securities, a
Person shall be (i) a Holder of one or more Outstanding Securities, or (ii) a
Person appointed by an instrument in writing as proxy for a Holder or Holders of
one or more Outstanding Securities by such Holder or Holders.  The only Persons
who shall be entitled to be present or to speak at any meeting of Holders shall
be the Persons entitled to vote at such meeting and their counsel, any
representatives of the Trustee and its counsel and any representatives of the
Company and its counsel.

SECTION 9.4  Quorum; Action.
             --------------

          The Persons entitled to vote a majority in aggregate principal amount
of the Outstanding Securities shall constitute a quorum.  In the absence of a
quorum within 30 minutes of the time appointed for any such meeting, the meeting
shall, if convened at the request of Holders of Securities, be dissolved.  In
any other case, the meeting may be adjourned for a period of not less than 10
days as determined by the chairman of the meeting prior to the adjournment of
such meeting.  In the absence of a quorum at any such adjourned meeting, such
adjourned meeting may be further adjourned for a period not less than 10 days as
determined by the chairman of the meeting prior to the adjournment of such
adjourned meeting (subject to repeated applications of this sentence).  Notice
of the reconvening of any adjourned meeting shall be given as provided in
Section 9.2(l), except that such notice need be given only once not less than
five days prior to the date on which the meeting is scheduled to be reconvened.
Notice of the reconvening of an adjourned meeting shall state expressly the
percentage of the aggregate principal amount of the Outstanding Securities which
shall constitute a quorum.

          Subject to the foregoing, at the reconvening of any meeting adjourned
for a lack of a quorum, the Persons entitled to vote 25% in aggregate principal
amount of the outstanding Securities at the time shall constitute a quorum for
the taking of any action set forth in the notice of the original meeting.

          At a meeting or an adjourned meeting duly reconvened and at which a
quorum is present as aforesaid, any resolution and all matters (except as
limited by the proviso to Section 8.2 and except to the extent Section 10.12
requires a different vote) shall be effectively passed and decided if passed or
decided by the lesser of (i) the Holders of not less than a majority in
aggregate principal amount of Outstanding Securities or (ii) the Holders of not
less than 66-2/3% in aggregate principal amount of Outstanding Securities
present at any given meeting at which a quorum is present.

          Any resolution passed or decisions taken at any meeting of Holders of
Securities duly held in accordance with this Section shall be binding on all the
Holders of Securities whether or not present or represented at the meeting.  The
Trustee shall, in the name and at the
<PAGE>

                                     -78-

expense of the Company, notify all the Holders of Securities of any such
resolutions or decisions pursuant to Section 1.6.

SECTION 9.5  Determination of Voting Rights; Conduct and Adjournment of
             ----------------------------------------------------------
Meetings.
--------

          (1) Notwithstanding any other provisions of this Indenture, the
Trustee may make such reasonable regulations as it may deem advisable for any
meeting of Holders of Securities in regard to proof of the holding of Securities
and of the appointment of proxies and in regard to the appointment and duties of
inspectors of votes, the submission and examination of proxies, certificates and
other evidence of the right to vote, and such other matters concerning the
conduct of the meeting as it shall deem appropriate.  Except as otherwise
permitted or required by any such regulations, the holding of Securities shall
be proved in the manner specified in Section 1.4 and the appointment of any
proxy shall be proved in the manner specified in Section 1.4 or by having the
signature of the Person executing the proxy guaranteed by any bank, broker or
other eligible institution participating in a recognized medallion signature
guarantee program.

          (2) The Trustee shall, by an instrument in writing, appoint a
temporary chairman (which may be the Trustee) of the meeting, unless the meeting
shall have been called by the Company or by Holders of Securities as provided in
Section 9.2(1), in which case the Company or the Holders of Securities calling
the meeting, as the case may be, shall in like manner appoint a temporary
chairman.  A permanent chairman and a permanent secretary of the meeting shall
be elected by vote of the Persons entitled to vote a majority in aggregate
principal amount of the Outstanding Securities represented at the meeting.

          (3) At any meeting, each Holder of a Security or proxy shall be
entitled to one vote for each $1,000 aggregate principal amount of Securities
held or represented by him; provided, however, that no vote shall be cast or
counted at any meeting in respect of any Security challenged as not Outstanding
and ruled by the chairman of the meeting to be not Outstanding.  The chairman of
the meeting shall have no right to vote, except as a Holder of a Security or
proxy.

          (4) Any meeting of Holders of Securities duly called pursuant to
Section 9.2 at which a quorum is present may be adjourned from time to time by
Persons entitled to vote a majority in aggregate principal amount of the
Outstanding Securities represented at the meeting, and the meeting may be held
as so adjourned without further notice.

SECTION 9.6  Counting Votes and Recording Action of Meetings.
             -----------------------------------------------

          The vote upon any resolution submitted to any meeting of Holders of
Securities shall be by written ballots on which shall be subscribed the
signatures of the Holders of Securi-
<PAGE>

                                     -79-

ties or of their representatives by proxy and the principal amounts at Stated
Maturity and serial numbers of the Outstanding Securities held or represented by
them. The permanent chairman of the meeting shall appoint two inspectors of
votes who shall count all votes cast at the meeting for or against any
resolution and who shall make and file with the secretary of the meeting their
verified written reports in duplicate of all votes cast at the meeting. A
record, at least in duplicate, of the proceedings of each meeting of Holders of
Securities shall be prepared by the secretary of the meeting and there shall be
attached to said record the original reports of the inspectors of votes on any
vote by ballot taken thereat and affidavits by one or more Persons having
knowledge of the facts setting forth a copy of the notice of the meeting and
showing that said notice was given as provided in Section 9.2 and, if
applicable, Section 9.4. Each copy shall be signed and verified by the
affidavits of the permanent chairman and secretary of the meeting and one such
copy shall be delivered to the Company and another to the Trustee to be
preserved by the Trustee, the latter to have attached thereto the ballots voted
at the meeting. Any record so signed and verified shall be conclusive evidence
of the matters therein stated.

                                   ARTICLE X

                                   COVENANTS

SECTION 10.1  Payment of Principal, Premium and Interest.
              ------------------------------------------

          The Company covenants and agrees that it will duly and punctually pay
the principal of and premium, if any, and interest (including Liquidated
Damages, if any) on the Securities in accordance with the terms of the
Securities and this Indenture.  The Company will deposit or cause to be
deposited with the Trustee, no later than the opening of business on the date of
the Stated Maturity of any Security or no later than the opening of business on
the due date for any installment of interest, all payments so due, which
payments shall be in immediately available funds on the date of such Stated
Maturity or due date, as the case may be.  The conversions of Securities
pursuant to Article XII hereof, together with any cash payments required to be
made in accordance with the terms of the Securities and this Indenture will
satisfy the Company's obligations under this Section 10.1 with respect to such
Securities.

SECTION 10.2  Maintenance of Offices or Agencies.
              ----------------------------------

          The Company will maintain in the Borough of Manhattan, The City of New
York, an office or agency where the Securities may be surrendered for
registration of transfer or exchange or for presentation for payment or for
conversion, redemption or repurchase and where notices and demands to or upon
the Company in respect of the Securities and this Indenture may be served.  The
Company will give prompt written notice to the Trustee of the location, and any
change in the location, of such office or agency not designated or appointed
<PAGE>

                                     -80-

by the Trustee. If at any time the Company shall fail to maintain any such
required office or agency or shall fail to furnish the Trustee with the address
thereof, such presentations, surrenders, notices and demands may be made or
served at the Corporate Trust Office or the office or agency of the Trustee in
the Borough of Manhattan, The City of New York.

          The Company may at any time and from time to time vary or terminate
the appointment of any such agent or appoint any additional agents for any or
all of such purposes; provided, however, that until all of the Securities have
been delivered to the Trustee for cancellation, or moneys sufficient to pay the
principal of, premium, if any, and interest on the Securities have been made
available for payment and either paid or returned to the Company pursuant to the
provisions of Section 10.3, the Company will maintain in the Borough of
Manhattan, The City of New York, an office or agency where Securities may be
presented or surrendered for payment and conversion, which shall initially be
Bank One Trust Company, N.A., where Securities may be surrendered for
registration of transfer or exchange and where notices and demands to or upon
the Company in respect of the Securities and this Indenture may be served.  The
Company will give prompt written notice to the Trustee, and notice to the
Holders in accordance with Section 1.6, of the appointment or termination of any
such agents and of the location and any change in the location of any such
office or agency.

          The Company hereby initially designates the Trustee as Paying Agent,
Security Registrar and Conversion Agent, and the Corporate Trust Office of the
Trustee in the Borough of Manhattan, The City of New York, located at 153 West
51st Street, New York, New York 10019, attention:  Corporate Trust
Administration (AMERISOURCE HEALTH CORPORATION 5% Convertible Subordinated Notes
due December 1, 2007) as one such office or agency of the Company for each of
the aforesaid purposes.

SECTION 10.3  Money for Security Payments to Be Held in Trust.
              -----------------------------------------------

          If the Company shall act as its own Paying Agent, it will, on or
before each due date of the principal of, premium, if any, or interest on any of
the Securities, segregate and hold in trust for the benefit of the Persons
entitled thereto a sum sufficient to pay the principal, premium, if any, or
interest so becoming due until such sums shall be paid to such Persons or
otherwise disposed of as herein provided and the Company will promptly notify
the Trustee of its action or failure so to act.

          Whenever the Company shall have one or more Paying Agents, it will, no
later than the opening of business on each due date of the principal of,
premium, if any, or interest on any Securities, deposit with the Trustee a sum
in funds immediately payable on the payment date sufficient to pay the
principal, premium, if any, or interest so becoming due, such sum to be held for
the benefit of the Persons entitled to such principal, premium, if any, or
interest, and (unless such Paying Agent is the Trustee) the Company will
promptly notify the Trustee of any failure so to act.
<PAGE>

                                     -81-

          The Company will cause each Paying Agent other than the Trustee to
execute and deliver to the Trustee an instrument in which such Paying Agent
shall agree with the Trustee, subject to the provisions of this Section, that
such Paying Agent will:

          (1) hold all sums held by it for the payment of the principal of,
     premium, if any, or interest on Securities for the benefit of the Persons
     entitled thereto until such sums shall be paid to such Persons or otherwise
     disposed of as herein provided;

          (2) give the Trustee notice of any default by the Company or the
     Subsidiary Guarantor (or any other obligor upon the Securities) in the
     making of any payment of principal, premium, if any, or interest; and

          (3) at any time during the continuance of any such default, upon the
     written request of the Trustee, forthwith pay to the Trustee all sums so
     held by such Paying Agent.

          The Company may at any time, for the purpose of obtaining the
satisfaction and discharge of this Indenture or for any other purpose, pay, or
by Company Order direct any Paying Agent to pay, to the Trustee all sums held in
trust by the Company or such Paying Agent, such sums to be held by the Trustee
upon the same trusts as those upon which such sums were held by the Company or
such Paying Agent; and, upon such payment by any Paying Agent to the Trustee,
such Paying Agent shall be released from all further liability with respect to
such money.

          Any money deposited with the Trustee or any Paying Agent, or then held
by the Company, in trust for the payment of the principal of, premium, if any,
or interest on any Security and remaining unclaimed for two years after such
principal, premium, if any, or interest has become due and payable shall be paid
to the Company on Company Request, or (if then held by the Company) shall be
discharged from such trust; and the Holder of such Security shall thereafter, as
an unsecured general creditor, look only to the Company for payment thereof, and
all liability of the Trustee or such Paying Agent with respect to such trust
money, and all liability of the Company as trustee thereof, shall thereupon
cease.

SECTION 10.4  Existence.
              ---------

          Subject to Article VII, the Company will do or cause to be done all
things necessary to preserve and keep in full force and effect its and the
Subsidiary Guarantor's existence, rights (charter and statutory) and franchises,
except to the extent that the Board of Directors shall determine that the
failure to do so would not have a material adverse effect on the business,
assets, financial condition or results of operations of the Company or the
Subsidiary Guarantor, as the case may be; provided, however, that the Company
shall not be required to preserve any such right or franchise if the Company
shall determine that the preservation
<PAGE>

                                     -82-

thereof is no longer desirable in the conduct of either its or the Subsidiary
Guarantor's business and that the loss thereof is not disadvantageous in any
material respect to the Holders.

SECTION 10.5  Maintenance of Properties.
              -------------------------

          The Company will cause all properties used or useful in the conduct of
its business or the business of any Significant Subsidiary, including the
Subsidiary Guarantor, to be maintained and kept in good condition, repair and
working order and supplied with all necessary equipment and will cause to be
made all necessary repairs, renewals, replacements, betterments and improvements
thereof, all as in the judgment of the Company may be necessary so that the
business carried on in connection therewith may be properly and advantageously
conducted at all times; provided, however, that nothing in this Section shall
prevent the Company from discontinuing the operation or maintenance of any of
such properties if such discontinuance is, in the judgment of the Company,
desirable in the conduct of its business or the business of any Significant
Subsidiary and not disadvantageous in any material respect to the Holders.

SECTION 10.6  Payment of Taxes and Other Claims.
              ---------------------------------

          The Company will pay or discharge, or cause to be paid or discharged,
before the same may become delinquent, (i) all taxes, assessments and
governmental charges levied or imposed upon the Company, the Subsidiary
Guarantor or any other Significant Subsidiary or upon the income, profits or
property of the Company, the Subsidiary Guarantor or any other Significant
Subsidiary, (ii) all claims for labor, materials and supplies which, if unpaid,
might by law become a lien or charge upon the property of the Company, the
Subsidiary Guarantor or any other Significant Subsidiary, and (iii) all stamps
and other duties, if any, which may be imposed by the United States or any
political subdivision thereof or therein in connection with the issuance,
transfer, exchange or conversion of any Securities or with respect to this
Indenture; provided, however, that, in the case of clauses (i) and (ii), the
Company shall not be required to pay or discharge or cause to be paid or
discharged any such tax, assessment, charge or claim (A) if the failure to do so
will not, in the aggregate, have a material adverse impact on the Company, or
(B) if the amount, applicability or validity is being contested in good faith by
appropriate proceedings.

SECTION 10.7  Registration and Listing.
              ------------------------

          The Company (i) will effect all registrations with, and obtain all
approvals by, all governmental authorities that may be necessary under any
United States Federal or state law (including the Securities Act, the Exchange
Act and state securities and Blue Sky laws) before the shares of Common Stock
issuable upon conversion of Securities are issued and delivered, and qualified
or listed as contemplated by clause (ii) (it being understood that the Company
shall not be required to register the Securities under the Securities Act,
except pur-
<PAGE>

                                     -83-

suant to the Registration Rights Agreement referred to in Section 10.11); and
(ii) will qualify the shares of Common Stock required to be issued and delivered
upon conversion of Securities, prior to such issuance or delivery, for listing
on the New York Stock Exchange or, if the Common Stock is not then listed on the
New York Stock Exchange, list the Common Stock on each national securities
exchange or quotation system on which outstanding Common Stock is listed or
quoted at the time of such delivery.

          Nothing in this Section will limit the application of Section 10.11.

SECTION 10.8  Statement by Officers as to Default.
              -----------------------------------

          The Company shall deliver to the Trustee, within 120 days after the
end of each fiscal year of the Company ending after the date hereof, an
Officers' Certificate, stating whether or not to the best knowledge of the
signers thereof the Company is in default in the performance and observance of
any of the terms, provisions and conditions of this Indenture (without regard to
any period of grace or requirement of notice provided hereunder) and, if the
Company shall be in default, specifying all such defaults and the nature and
status thereof of which they may have knowledge.

          The Company will deliver to the Trustee, forthwith upon becoming aware
of any default or any Event of Default under the Indenture, an Officers'
Certificate specifying with particularity such default or Event of Default and
further stating what action the Company has taken, is taking or proposes to take
with respect thereto.  For the purpose of this Section, the term "default" means
any event which is, or after notice or lapse of time or both would become, an
Event of Default.

          Any notice required to be given under this Section 10.8 shall be
delivered to the Trustee at its Corporate Trust Office.

SECTION 10.9  Delivery of Certain Information.
              -------------------------------

          At any time when the Company is not subject to Section 13 or 15(d) of
the Exchange Act, upon the request of a Holder of a Restricted Security or the
holder of shares of Common Stock issued upon conversion thereof, the Company
will promptly furnish or cause to be furnished Rule 144A Information (as defined
below) to such Holder of Restricted Securities or such holder of shares of
Common Stock issued upon conversion of Restricted Securities, or to a
prospective purchaser of any such security designated by any such Holder or
holder, as the case may be, to the extent required to permit compliance by such
Holder or holder with Rule 144A under the Securities Act (or any successor
provision thereto) in connection with the resale of any such security; provided,
however, that the Company shall not be required to furnish such information in
connection with any request made on or after the date which is two years from
the later of (i) the date such a security (or any such predecessor secu-
<PAGE>

                                     -84-

rity) was last acquired from the Company or (ii) the date such a security (or
any such predecessor security) was last acquired from an "affiliate" of the
Company within the meaning of Rule 144 under the Securities Act (or any
successor provision thereto). "Rule 144A Information" shall be such information
as is specified pursuant to Rule 144A(d)(4) under the Securities Act (or any
successor provision thereto).

SECTION 10.10  Intentionally Omitted.
               ---------------------

SECTION 10.11  Registration Rights.
               -------------------

          The Company agrees that the Holders from time to time of Registrable
Securities (as defined below) are entitled to the benefits of a Registration
Rights Agreement, dated as of December 12, 2000 (the "Registration Rights
Agreement"), executed by the Company and the Subsidiary Guarantor.  The
provisions of Section 7 of the Registration Rights Agreement are incorporated
herein by reference.

          Whenever in this Indenture there is mentioned, in any context, the
payment of the principal of, premium, if any, or interest on, or in respect of,
any Security, such mention shall be deemed to include mention of the payment of
Liquidated Damages (as defined in the Registration Rights Agreement) provided
for in this Section to the extent that, in such context, Liquidated Damages are,
were or would be payable in respect thereof pursuant to the provisions of this
Section and express mention of the payment of Liquidated Damages (if applicable)
in any provisions hereof shall not be construed as excluding Liquidated Damages
in those provisions hereof where such express mention is not made.

          If a Security, or the shares of Common Stock issuable upon conversion
of a Security, is a Registrable Security (as defined in the Registration Rights
Agreement), and the Holder thereof elects to sell such Registrable Security
pursuant to the Shelf Registration Statement then, by its acceptance thereof,
the Holder of such Registrable Security will have agreed to be bound by the
terms of the Registration Rights Agreement relating to the Registrable
Securities which are the subject of such election.

          For the purposes of the Registration Rights Agreement, the term
"Holder" includes any Person that has a beneficial interest in any Restricted
-------
Global Security or any beneficial interest in a global security representing
shares of Common Stock issuable upon conversion of a Security.

          If Liquidated Damages are payable under the Registration Rights
Agreement, the Company shall deliver to the Trustee a certificate to that effect
stating (i) the amount of Liquidated Damages that is payable and (ii) the date
on which Liquidated Damages are payable.  Unless and until a Responsible Officer
of the Trustee receives at the Corporate Trust Office such a certificate, the
Trustee may assume without inquiry that no Liquidated Damages are
<PAGE>

                                     -85-

payable. If Liquidated Damages have been paid by the Company directly to the
persons entitled to them, the Company shall deliver to the Trustee a certificate
setting forth the particulars of such payment.

SECTION 10.12  Waiver of Certain Covenants.
               ---------------------------

          The Company may omit in any particular instance to comply with any
covenant or condition set forth in Sections 10.4 (other than with respect to the
existence of the Company and the Subsidiary Guarantor (subject to Article VII)),
10.5 and 10.6, inclusive (other than a covenant or condition which under Article
VIII cannot be modified or amended without the consent of the Holder of each
Outstanding Security affected), if before the time for such compliance either
(i) the Holders of not less than a majority in aggregate principal amount of the
Outstanding Securities act by written consent or (ii) if at a meeting of Holders
of the Outstanding Securities at which a quorum is present, Holders of at least
66 2/3% in aggregate principal amount of Outstanding Securities represented at
such meeting adopt a resolution and either waive such compliance in such
instance or generally waive compliance with such covenant or condition, but no
such waiver shall extend to or affect such covenant or condition except to the
extent so expressly waived, and, until such waiver shall become effective, the
obligations of the Company and the duties of the Trustee or any Paying or
Conversion Agent in respect of any such covenant or condition shall remain in
full force and effect.

                                   ARTICLE XI

                            REDEMPTION OF SECURITIES

SECTION 11.1  Right of Redemption.
              -------------------

          The Securities may be redeemed in accordance with the provisions of
the form of Securities set forth in Section 2.2.

SECTION 11.2  Applicability of Article.
              ------------------------

          Redemption of Securities at the election of the Company or otherwise,
as permitted or required by any provision of the Securities or this Indenture,
shall be made in accordance with such provision and this Article XI.

SECTION 11.3  Election to Redeem; Notice to Trustee.
              -------------------------------------

          The election of the Company to redeem any Securities shall be
evidenced by a Board Resolution.  In case of any redemption at the election of
the Company of any of the Securities, the Company shall, at least 45 days prior
to the Redemption Date fixed by the Com-
<PAGE>

                                     -86-

pany (unless a shorter notice shall be satisfactory to the Trustee), notify the
Trustee in writing of such Redemption Date.

SECTION 11.4  Selection by Trustee of Securities to Be Redeemed.
              -------------------------------------------------

          If less than all the Securities are to be redeemed, the particular
Securities to be redeemed shall be selected by the Trustee within five Business
Days after it receives the notice described in 11.3, from the Outstanding
Securities not previously called for redemption, by lot or by such other method
as the Trustee may deem fair and appropriate.

          If any Security selected for partial redemption is converted in part
before termination of the conversion right with respect to the portion of the
Security so selected, the converted portion of such Security shall be deemed (so
far as may be) to be the portion selected for redemption.  Securities which have
been converted during a selection of Securities to be redeemed may be treated by
the Trustee as Outstanding for the purpose of such selection.  The Trustee shall
promptly notify the Company and each Security Registrar in writing of the
securities selected for redemption and, in the case of any Securities selected
for partial redemption, the principal amount thereof to be redeemed.

          For all purposes of this Indenture, unless the context otherwise
requires, all provisions relating to the redemption of Securities shall relate,
in the case of any Securities redeemed or to be redeemed only in part, to the
portion of the principal amount of such Securities which has been or is to be
redeemed.

SECTION 11.5  Notice of Redemption.
              --------------------

          Notice of redemption shall be given in the manner provided in Section
1.6 to the Holders of Securities to be redeemed not less than 30 nor more than
60 days prior to the Redemption Date, and such notice shall be irrevocable.

          All notices of redemption shall state:

          (1) the Redemption Date,

          (2) the Redemption Price, and accrued interest (including Liquidated
     Damages, if any), if any, to the Redemption Date,

          (3) if less than all Outstanding Securities are to be redeemed,
     the aggregate principal amount of Securities to be redeemed and the
     aggregate principal amount of Securities which will be outstanding after
     such partial redemption,

          (4) that on the Redemption Date the Redemption Price, and accrued
     interest (including Liquidated Damages, if any), if any, to the Redemption
     Date, will be-
<PAGE>

                                     -87-

     come due and payable upon each such Security to be redeemed, and that
     interest thereon shall cease to accrue on and after said date,

          (5) the Conversion Rate, the date on which the right to convert
     the Securities to be redeemed will terminate and the places where such
     Securities may be surrendered for conversion, and

          (6) the place or places where such Securities are to be
     surrendered for payment of the Redemption Price and accrued interest
     (including Liquidated Damages, if any), if any, to the Redemption Date.

          In case of a partial redemption, the notice shall specify the serial
and CUSIP numbers (if any) and the portions thereof called for redemption and
that transfers and exchanges may occur on or prior to the Redemption Date.

          Notice of redemption of Securities to be redeemed at the election of
the Company shall be given by the Company or, at the Company's written request,
by the Trustee in the name of and at the expense of the Company.  Notice of
redemption of Securities to be redeemed at the election of the Company received
by the Trustee shall be given by the Trustee to each Paying Agent in the name of
and at the expense of the Company.

SECTION 11.6  Deposit of Redemption Price.
              ---------------------------

          On or prior to the Redemption Date, the Company shall deposit with the
Trustee (or, if the Company is acting as its own Paying Agent, segregate and
hold in trust as provided in Section 10.3) an amount of money (which shall be in
immediately available funds on such Redemption Date) sufficient to pay the
Redemption Price of, and (except if the Redemption Date shall be an Interest
Payment Date) accrued interest (including Liquidated Damages, if any) to the
Redemption Date on, all the Securities which are to be redeemed on that date
other than any Securities called for redemption on that date which have been
converted prior to the date of such deposit.

          If any Security called for redemption is converted, any money
deposited with the Trustee or so segregated and held in trust for the redemption
of such Security shall (subject to any right of the Holder of such Security or
any Predecessor Security to receive interest as provided in the last paragraph
of Section 3.7) be paid to the Company on Company Request or, if then held by
the Company, shall be discharged from such trust.

SECTION 11.7  Securities Payable on Redemption Date.
              -------------------------------------

          Notice of redemption having been given as aforesaid, the Securities to
be redeemed shall, on the Redemption Date, become due and payable at the
Redemption Price
<PAGE>

                                     -88-

therein specified and from and after such date (unless the Company shall default
in the payment of the Redemption Price, including accrued interest) such
Securities shall cease to bear interest. Upon surrender of any Security for
redemption in accordance with said notice such Security shall be paid by the
Company at the Redemption Price together with accrued and unpaid interest
(including Liquidated Damages, if any) to the Redemption Date; provided,
however, that installments of interest on Securities whose Stated Maturity is on
or prior to the Redemption Date shall be payable to the Holders of such
Securities, or one or more Predecessor Securities, registered as such on the
relevant Record Date according to their terms and the provisions of Section 3.7.

          If any Security called for redemption shall not be so paid upon
surrender thereof for redemption, the principal amount of, premium, if any, and,
to the extent permitted by applicable law, accrued interest on such Security
shall, until paid, bear interest from the Redemption Date at a rate of 5% per
annum and such Security shall remain convertible until the Redemption Price of
such Security (or portion thereof, as the case may be) shall have been paid or
duly provided for.

          Any Security which is to be redeemed only in part shall be surrendered
at the Corporate Trust Office or an office or agency of the Company designated
for that purpose pursuant to Section 10.2 (with, if the Company or the Trustee
so requires, due endorsement by, or a written instrument of transfer in form
satisfactory to the Company and the Trustee duly executed by, the Holder thereof
or his attorney duly authorized in writing), and the Company shall execute, and
the Trustee shall authenticate and make available for delivery to the Holder of
such Security without service charge, a new Security or Securities, of any
authorized denomination as requested by such Holder, in aggregate principal
amount equal to and in exchange for the unredeemed portion of the principal of
the Security so surrendered.

SECTION 11.8  Conversion Arrangement on Call for Redemption.
              ---------------------------------------------

          In connection with any redemption of Securities, the Company may
arrange for the purchase and conversion of any Securities by an agreement with
one or more investment bankers or other purchasers (the "Security Purchasers")
to purchase such Securities by paying to the Trustee in trust for the Holders,
on or before the Redemption Date, an amount not less than the applicable
Redemption Price, together with interest accrued to the Redemption Date, of such
Securities.  Notwithstanding anything to the contrary contained in this Article
XI, the obligation of the Company to pay the Redemption Price, together with
interest accrued to the Redemption Date, shall be deemed to be satisfied and
discharged to the extent such amount is so paid by such Security Purchasers.  If
such an agreement is entered into (a copy of which shall be filed with the
Trustee prior to the close of business on the Business Day immediately prior to
the Redemption Date), any Securities called for redemption that are not duly
surrendered for conversion by the Holders thereof may, at the option of the
Company, be deemed, to
<PAGE>

                                     -89-

the fullest extent permitted by law, and consistent with any agreement or
agreements with such Purchasers, to be acquired by such Security Purchasers from
such Holders and (notwithstanding anything to the contrary contained in Article
XII) surrendered by such Security Purchasers for conversion, all as of
immediately prior to the close of business on the Redemption Date (and the right
to convert any such Securities shall be extended through such time), subject to
payment of the above amount as aforesaid. At the direction of the Company, the
Trustee shall hold and dispose of any such amount paid to it by the Security
Purchasers to the Holders in the same manner as it would monies deposited with
it by the Company for the redemption of Securities. Without the Trustee's prior
written consent, no arrangement between the Company and such Security Purchasers
for the purchase and conversion of any Securities shall increase or otherwise
affect any of the powers, duties, responsibilities or obligations of the Trustee
as set forth in this Indenture, and the Company agrees to indemnify the Trustee
from, and hold it harmless against, any loss, liability or expense arising out
of or in connection with any such arrangement for the purchase and conversion of
any Securities between the Company and such Security Purchasers, including the
costs and expenses, including reasonable legal fees, incurred by the Trustee in
the defense of any claim or liability arising out of or in connection with the
exercise or performance of any of its powers, duties, responsibilities or
obligations under this Indenture.

                                  ARTICLE XII

                            CONVERSION OF SECURITIES

SECTION 12.1  Conversion Privilege and Conversion Rate.
              ----------------------------------------

          Subject to and upon compliance with the provisions of this Article, at
the option of the Holder thereof, any Security may be converted into fully paid
and nonassessable shares (calculated as to each conversion to the nearest
1/100th of a share) of Common Stock of the Company at the Conversion Rate,
determined as hereinafter provided, in effect at the time of conversion.  Such
conversion right shall commence on the initial issuance date of the Securities
and expire at the close of business on the date of Maturity, subject, in the
case of conversion of any Global Security, to any Applicable Procedures.  In
case a Security or portion thereof is called for redemption at the election of
the Company or the Holder thereof exercises his right to require the Company to
repurchase the Security, such conversion right in respect of the Security, or
portion thereof so called, shall expire at the close of business on the
Redemption Date or the Repurchase Date, as the case may be, unless the Company
defaults in making the payment due upon redemption or repurchase, as the case
may be (in each case subject as aforesaid to any Applicable Procedures with
respect to any Global Security).
<PAGE>

                                     -90-

          The rate at which shares of Common Stock shall be delivered upon
conversion (herein called the "Conversion Rate") shall be initially 18.8791
shares of Common Stock for each $1,000 principal amount of Securities.  The
Conversion Rate shall be adjusted in certain instances as provided in this
Article XII.

SECTION 12.2  Exercise of Conversion Privilege.
              --------------------------------

          In order to exercise the conversion privilege, the Holder of any
Security to be converted shall surrender such Security, duly endorsed in blank,
at any office or agency of the Company maintained for that purpose pursuant to
Section 10.2, accompanied by a duly signed conversion notice substantially in
the form set forth in Section 2.4 stating that the Holder elects to convert such
Security or, if less than the entire principal amount thereof is to be
converted, the portion thereof to be converted.  Each Security surrendered for
conversion (in whole or in part) during the Record Date Period shall (except in
the case of any Security or portion thereof which has been called for redemption
on a Redemption Date, or is repurchasable on a Repurchase Date, occurring, in
either case, within such Record Date Period and, as a result, the right to
convert would terminate in such period) be accompanied by payment in New York
Clearing House funds or other funds acceptable to the Company of an amount equal
to the interest payable on such Interest Payment Date on the principal amount of
such Security (or part thereof, as the case may be) being surrendered for
conversion; provided, however, that neither the Trustee, Conversion Agent, nor
the Paying Agent shall have any responsibility for or liability with respect to
determining the sufficiency of any such payment under this Section 12.2.  The
interest so payable on such Interest Payment Date with respect to any Security
(or portion thereof, if applicable) which is surrendered for conversion during
the Record Date Period shall be paid to the Holder of such Security as of such
Regular Record Date in an amount equal to the interest that would have been
payable on such Security if such Security had been converted as of the close of
business on such Interest Payment Date.  Interest payable in respect of any
Security surrendered for conversion on or after an Interest Payment Date but
before the next Record Date Period shall be paid to the Holder of such Security
as of the next Regular Record Date, notwithstanding the exercise of the right of
conversion.  Except as provided in this paragraph and subject to the last
paragraph of Section 3.7, no cash payment or adjustment shall be made upon any
conversion on account of any interest accrued from the Interest Payment Date
next preceding the conversion date, in respect of any Security (or part thereof,
as the case may be) surrendered for conversion, or on account of any dividends
on the Common Stock issued upon conversion.  The Company's delivery to the
Holder of the number of shares of Common Stock (and cash in lieu of fractions
thereof, as provided in this Indenture) into which a Security is convertible
will be deemed to satisfy the Company's obligation to pay the principal amount
of the Security.

          Securities surrendered in accordance with this Section 12.2 by 9:00
a.m., New York City time shall be deemed to have been converted immediately
prior to the close of busi-
<PAGE>

                                     -91-

ness on the day of surrender of such Securities for conversion in accordance
with the foregoing provisions, and at such time the rights of the Holders of
such Securities as Holders shall cease, and the Person or Persons entitled to
receive the Common Stock issuable upon conversion shall be treated for all
purposes as the record holder or holders of such Common Stock at such time. As
promptly as practicable on or after the conversion date, the Company shall issue
and deliver to the Trustee, for delivery to the Holder, a certificate or
certificates for the number of full shares of Common Stock issuable upon
conversion, together with payment in lieu of any fraction of a share, as
provided in Section 12.3.

          All shares of Common Stock delivered upon such conversion of
Restricted Securities shall bear restrictive legends substantially in the form
of the legends required to be set forth on the Restricted Securities pursuant to
Section 3.5 and shall be subject to the restrictions on transfer provided in
such legends.  Neither the Trustee nor any agent maintained for the purpose of
such conversion shall have any responsibility for the inclusion or content of
any such restrictive legends on such Common Stock; provided, however, that the
Trustee or any agent maintained for the purpose of such conversion shall have
provided to the Company prior to or concurrently with a request to the Company
to deliver such Common Stock, written notice that the Securities delivered for
conversion are Restricted Securities.

          In the case of any Security which is converted in part only, upon such
conversion the Company shall execute and the Trustee shall authenticate and
deliver to the Holder thereof, at the expense of the Company, a new Security or
Securities of authorized denominations in an aggregate principal amount equal to
the unconverted portion of the principal amount of such Security.  A Security
may be converted in part, but only if the principal amount of such Security to
be converted is any integral multiple of $1,000 and the principal amount of such
security to remain Outstanding after such conversion is equal to $1,000 or any
integral multiple of $1,000 in excess thereof.

          If shares of Common Stock to be issued upon conversion of a Restricted
Security, or Securities to be issued upon conversion of a Restricted Security in
part only, are to be registered in a name other than that of the beneficial
owner of such Restricted Security, then such Holder must deliver to the
Conversion Agent a Surrender Certificate, dated the date of surrender of such
Restricted Security and signed by such beneficial owner, as to compliance with
the restrictions on transfer applicable to such Restricted Security.  Neither
the Trustee nor any Conversion Agent, Registrar or Transfer Agent shall be
required to register in a name other than that of the beneficial owner, shares
of Common Stock or Securities issued upon conversion of any such Restricted
Security not so accompanied by a properly completed Surrender Certificate.
<PAGE>

                                     -92-

SECTION 12.3  Fractions of Shares.
              -------------------

          No fractional shares of Common Stock shall be issued upon conversion
of any Security or Securities.  If more than one Security shall be surrendered
for conversion at one time by the same Holder, the number of full shares which
shall be issuable upon conversion thereof shall be computed on the basis of the
aggregate principal amount of the Securities (or specified portions thereof) so
surrendered.  Instead of any fractional share of Common Stock which would
otherwise be issuable upon conversion of any Security or Securities (or
specified portions thereof), the Company shall calculate and pay a cash
adjustment in respect of such fraction (calculated to the nearest 1/100th of a
share) in an amount equal to the same fraction of the Closing Price Per Share at
the close of business on the day of conversion.

SECTION 12.4  Adjustment of Conversion Rate.
              -----------------------------

          The Conversion Rate shall be subject to adjustments from time to time
as follows:

          (1)  In case the Company shall pay or make a dividend or other
     distribution on shares of any class of capital stock payable in shares of
     Common Stock, the Conversion Rate in effect at the opening of business on
     the day following the date fixed for the determination of shareholders
     entitled to receive such dividend or other distribution shall be increased
     by dividing such Conversion Rate by a fraction of which the numerator shall
     be the number of shares of Common Stock outstanding at the close of
     business on the date fixed for such determination and the denominator shall
     be the sum of such number of shares and the total number of shares
     constituting such dividend or other distribution, such increase to become
     effective immediately after the opening of business on the day following
     the date fixed for such determination.  If, after any such date fixed for
     determination, any dividend or distribution is not in fact paid, the
     Conversion Rate shall be immediately readjusted, effective as of the date
     the Board of Directors determines not to pay such dividend or distribution,
     to the Conversion Rate that would have been in effect if such determination
     date had not been fixed.  For the purposes of this paragraph (1), the
     number of shares of Common Stock at any time outstanding shall not include
     shares held in the treasury of the Company but shall include shares
     issuable in respect of scrip certificates issued in lieu of fractions of
     shares of Common Stock.  The Company will not pay any dividend or make any
     distribution on shares of Common Stock held in the treasury of the Company.

          (2)  In case the Company shall issue rights, options or warrants to
     all holders of its Common Stock entitling them to subscribe for or purchase
     shares of Common Stock at a price per share less than the current market
     price per share (determined as provided in paragraph (8) of this Section
     12.4) of the Common Stock on the date fixed for the determination of
     stockholders entitled to receive such rights, options or war-
<PAGE>

                                     -93-

     rants (other than any rights, options or warrants that by their terms will
     also be issued to any Holder upon conversion of a Security into shares of
     Common Stock without any action required by the Company or any other
     Person), the Conversion Rate in effect at the opening of business on the
     day following the date fixed for such determination shall be increased by
     dividing such Conversion Rate by a fraction of which the numerator shall be
     the number of shares of Common Stock outstanding at the close of business
     on the date fixed for such determination plus the number of shares of
     Common Stock which the aggregate of the offering price of the total number
     of shares of Common Stock so offered for subscription or purchase would
     purchase at such current market price and the denominator shall be the
     number of shares of Common Stock outstanding at the close of business on
     the date fixed for such determination plus the number of shares of Common
     Stock so offered for subscription or purchase, such increase to become
     effective immediately after the opening of business on the day following
     the date fixed for such determination. If, after any such date fixed for
     determination, any such rights, options or warrants are not in fact issued,
     or are not exercised prior to the expiration thereof, the Conversion Rate
     shall be immediately readjusted, effective as of the date such rights,
     options or warrants expire, or the date the Board of Directors determines
     not to issue such rights, options or warrants, to the Conversion Rate that
     would have been in effect if the unexercised rights, options or warrants
     had never been granted or such determination date had not been fixed, as
     the case may be. For the purposes of this paragraph (2), the number of
     shares of Common Stock at any time outstanding shall not include shares
     held in the treasury of the Company but shall include shares issuable in
     respect of scrip certificates issued in lieu of fractions of shares of
     Common Stock. The Company will not issue any rights, options or warrants in
     respect of shares of Common Stock held in the treasury of the Company.

          (3)  In case outstanding shares of Common Stock shall be subdivided
     into a greater number of shares of Common Stock, the Conversion Rate in
     effect at the opening of business on the day following the day upon which
     such subdivision becomes effective shall be proportionately increased, and,
     conversely, in case outstanding shares of Common Stock shall be combined
     into a smaller number of shares of Common Stock, the Conversion Rate in
     effect at the opening of business on the day following the day upon which
     such subdivision or combination becomes effective shall be proportionately
     reduced, such increase or reduction, as the case may be, to become
     effective immediately after the opening of business on the day following
     the day upon which such subdivision or combination becomes effective.

          (4)  In case the Company shall, by dividend or otherwise, distribute
     to all holders of its Common Stock evidences of its indebtedness, shares of
     any class of capital stock or other property (including cash or assets or
     securities, but excluding (i) any rights, options or warrants referred to
     in paragraph (2) of this Section, (ii) any
<PAGE>

                                     -94-

     dividend or distribution paid exclusively in cash, (iii) any dividend or
     distribution referred to in paragraph (1) of this Section and (iv) mergers
     or consolidations to which Section 12.11 applies), the Conversion Rate
     shall be adjusted so that the same shall equal the rate determined by
     dividing the Conversion Rate in effect immediately prior to the close of
     business on the date fixed for the determination of stockholders entitled
     to receive such distribution by a fraction of which the numerator shall be
     the current market price per share (determined as provided in paragraph (8)
     of this Section 12.4) of the Common Stock on the date fixed for such
     determination less the then fair market value (as determined by the Board
     of directors, whose determination shall be conclusive and described in a
     Board Resolution filed with the Trustee) of the portion of the assets,
     shares or evidences of indebtedness so distributed applicable to one share
     of Common Stock and the denominator shall be such current market price per
     share of the Common Stock, such adjustment to become effective immediately
     prior to the opening of business on the day following the date fixed for
     the determination of stockholders entitled to receive such distribution.
     If after any such date fixed for determination, any such distribution is
     not in fact made, the Conversion Rate shall be immediately readjusted,
     effective as of the date of the Board of Directors determines not to make
     such distribution, to the Conversion Rate that would have been in effect if
     such determination date had not been fixed.

          (5)  In case the Company shall, by dividend or otherwise, distribute
     to all holders of its Common Stock cash (excluding any cash that is
     distributed as part of a distribution referred to in paragraph (4) of this
     Section or cash distributed upon a merger or consolidation to which Section
     12.11 applies) in an aggregate amount that, combined together with (I) the
     aggregate amount of any other all-cash distributions to all holders of its
     Common Stock made exclusively in cash within the 365-day period preceding
     the date of payment of such distribution and in respect of which no
     adjustment pursuant to this paragraph (5) has been made and (II) the
     aggregate of any cash plus the fair market value (as determined by the
     Board of Directors, whose determination shall be conclusive and described
     in a Board Resolution) of consideration payable in respect of any tender
     offer by the Company or any of its Subsidiaries for all or any portion of
     the Common Stock concluded within the 365-day period preceding the date of
     payment of such distribution and in respect of which no adjustment pursuant
     to paragraph (6) of this Section 12.4 has been made (the "combined cash and
     tender amount") exceeds 10% of the product of the current market price per
     share (determined as provided in paragraph (8) of this Section 12.4) of the
     Common Stock on the date for the determination of holders of shares of
     Common Stock entitled to receive such distribution times the number of
     shares of Common Stock outstanding on such date (the "aggregate current
     market price"), then, and in each such case, immediately after the close of
     business on such date for determination, the Conversion Rate shall be
     adjusted so that the same shall equal the rate determined by dividing the
     Conversion
<PAGE>

                                     -95-

     Rate in effect immediately prior to the close of business on the date fixed
     for determination of the stockholders entitled to receive such distribution
     by a fraction (i) the numerator of which shall be equal to the current
     market price per share (determined as provided in paragraph (8) of this
     Section) of the Common Stock on the date fixed for such determination less
     an amount equal to the quotient of (x) the excess of such combined cash and
     tender amount over such aggregate current market price divided by (y) the
     number of shares of Common Stock outstanding on such date for determination
     and (ii) the denominator of which shall be equal to the current market
     price per share (determined as provided in paragraph (8) of this Section
     12.4) of the Common Stock on such date fixed for determination.

          (6)  In case a tender offer made by the Company or any Subsidiary for
     all or any portion of the Common Stock shall expire and such tender offer
     (as amended upon the expiration thereof) shall require the payment to
     stockholders (based on the acceptance (up to any maximum specified in the
     terms of the tender offer) of Purchased Shares (as defined below)) of an
     aggregate consideration having a fair market value (as determined by the
     Board of Directors, whose determination shall be conclusive and described
     in a Board Resolution) that combined together with (I) the aggregate of the
     cash plus the fair market value (as determined by the Board of Directors,
     whose determination shall be conclusive and described in a Board
     Resolution), as of the expiration of such tender offer, of consideration
     payable in respect of any other tender offer by the Company or any
     Subsidiary for all or any portion of the Common Stock expiring within the
     365-day period preceding the expiration of such tender offer and in respect
     of which no adjustment pursuant to this paragraph (6) has been made and
     (II) the aggregate amount of any cash distributions to all holders of the
     Common Stock within 365-day period preceding the expiration of such tender
     offer and in respect of which no adjustment pursuant to paragraph (5) of
     this Section has been made (the "combined tender and cash amount") exceeds
     10% of the product of the current market price per share of the Common
     Stock (determined as provided in paragraph (8) of this Section 12.4) as of
     the last time (the "Expiration Time") tenders could have been made pursuant
     to such tender offer (as it may be amended) times the number of shares of
     Common Stock outstanding (including any tendered shares) as of the
     Expiration Time, then, and in each such case immediately prior to the
     opening of business on the day after the date of the Expiration Time, the
     Conversion Rate shall be adjusted so that the same shall equal the rate
     determined by dividing the Conversion Rate immediately prior to close of
     business on the date of the Expiration Time by a fraction (i) the numerator
     of which shall be equal to (A) the product of (I) the current market price
     per share of the Common Stock (determined as provided in paragraph (8) of
     this Section 12.4) on the date of the Expiration Time multiplied by (II)
     the number of shares of Common Stock outstanding (including any tendered
     shares) on the Expiration Time less (B) the combined tender and cash
     amount, and (ii) the denominator of which shall be equal to the product
<PAGE>

                                     -96-

     of (A) the current market price per share of the Common Stock (determined
     as provided in paragraph (8) of this Section 12.4) as of the Expiration
     Time multiplied by (B) the number of shares of Common Stock outstanding
     (including any tendered shares) as of the Expiration Time less the number
     of all shares validly tendered and not withdrawn as of the Expiration Time
     (the shares deemed so accepted up to any such maximum, being referred to as
     the "Purchased Shares").

          (7)  The reclassification of Common Stock into securities other than
     Common Stock (other than any reclassification upon a consolidation or
     merger to which Section 12.11 applies) shall be deemed to involve (a) a
     distribution of such securities other than Common Stock to all holders of
     Common Stock (and the effective date of such reclassification shall be
     deemed to be "the date fixed for the determination of stockholders entitled
     to receive such distribution" and "the date fixed for such determination"
     within the meaning of paragraph (4) of this Section), and (b) a subdivision
     or combination, as the case may be, of the number of shares of Common Stock
     outstanding immediately prior to such reclassification into the number of
     shares of Common Stock outstanding immediately thereafter (and the
     effective date of such reclassification shall be deemed to be "the day upon
     which such subdivision becomes effective" or "the day upon which such
     combination becomes effective", as the case may be, and "the day upon which
     such subdivision or combination becomes effective" within the meaning of
     paragraph (3) of this Section 12.4).

          (8)  For the purpose of any computation under paragraphs (2), (4), (5)
     or (6) of this Section 12.4, the current market price per share of Common
     Stock on any date shall be calculated by the Company and be the average of
     the daily Closing Prices Per Share for the five consecutive Trading Days
     selected by the Company commencing not more than 10 Trading Days before,
     and ending not later than the earlier of the day in question and the day
     before the "ex" date with respect to the issuance or distribution requiring
     such computation. For purposes of this paragraph, the term "`ex' date",
     when used with respect to any issuance or distribution, means the first
     date on which the Common Stock trades regular way in the applicable
     securities market or on the applicable securities exchange without the
     right to receive such issuance or distribution.

          (9)  No adjustment in the Conversion Rate shall be required unless
     such adjustment (plus any adjustments not previously made by reason of this
     paragraph (9)) would require an increase or decrease of at least one
     percent in such rate; provided, however, that any adjustments which by
     reason of this paragraph (9) are not required to be made shall be carried
     forward and taken into account in any subsequent adjustment. All
     calculations under this Article shall be made to the nearest cent or to the
     nearest one-hundredth of a share, as the case may be.
<PAGE>

                                     -97-

          (10) The Company may make such increases in the Conversion Rate, for
     the remaining term of the Securities or any shorter term, in addition to
     those required by paragraphs (1), (2), (3), (4), (5) and (6) of this
     Section 12.4, as it considers to be advisable in order to avoid or diminish
     any income tax to any holders of shares of Common Stock resulting from any
     dividend or distribution of stock or issuance of rights or warrants to
     purchase or subscribe for stock or from any event treated as such for
     income tax purposes. The Company shall have the power to resolve any
     ambiguity or correct any error in this paragraph (10) and its actions in so
     doing shall, absent manifest error, be final and conclusive.

          (11) Notwithstanding the foregoing provisions of this Section, no
     adjustment of the Conversion Rate shall be required to be made (a) upon the
     issuance of shares of Common Stock pursuant to any present or future plan
     for the reinvestment of dividends or (b) because of a tender or exchange
     offer of the character described in Rule 13e-4(h)(5) under the Exchange Act
     or any successor rule thereto.

          (12) To the extent permitted by applicable law, the Company from time
     to time may increase the Conversion Rate by any amount for any period of
     time if the period is at least twenty (20) days, the increase is
     irrevocable during such period, and the Board of Directors shall have made
     a determination that such increase would be in the best interests of the
     Company, which determination shall be conclusive; provided, however, that
     no such increase shall be taken into account for purposes of determining
     whether the Closing Price Per Share of the Common Stock equals or exceeds
     105% of the Conversion Price in connection with an event which would
     otherwise be a Change of Control pursuant to Section 16.4. Whenever the
     Conversion Rate is increased pursuant to the preceding sentence, the
     Company shall give notice of the increase to the Holders in the manner
     provided in Section 1.6 at least fifteen (15) days prior to the date the
     increased Conversion Rate takes effect, and such notice shall state the
     increased Conversion Rate and the period during which it will be in effect.

SECTION 12.5  Notice of Adjustments of Conversion Rate.
              ----------------------------------------

          Whenever the Conversion Rate is adjusted as herein provided:

          (1)  the Company shall compute the adjusted Conversion Rate in
     accordance with Section 12.4 and shall prepare a certificate signed by the
     Chief Financial Officer of the Company setting forth the adjusted
     Conversion Rate and showing in reasonable detail the facts upon which such
     adjustment is based, and such certificate shall promptly be filed with the
     Trustee and with each Conversion Agent; and

          (2)  upon each such adjustment, a notice stating that the Conversion
     Rate has been adjusted and setting forth the adjusted Conversion Rate shall
     be required, and
<PAGE>

                                     -98-

     as soon as practicable after it is required, such notice shall be provided
     by the Company to all Holders in accordance with Section 1.6.

     Neither the Trustee nor any Conversion Agent shall be under any duty or
responsibility with respect to any such certificate or the information and
calculations contained therein, except to exhibit the same to any Holder of
Securities desiring inspection thereof at its office during normal business
hours, and shall not be deemed to have knowledge of any adjustment in the
Conversion Rate unless and until a Responsible Officer of the Trustee shall have
received such a certificate.  Until a Responsible Officer of the Trustee
receives such a certificate, the Trustee and each Conversion Agent may assume
without inquiry that the last Conversion Rate of which the Trustee has knowledge
of remains in effect.

SECTION 12.6  Notice of Certain Corporate Action.
              ----------------------------------

           In case:

           (1) the Company shall declare a dividend (or any other distribution)
     on its Common Stock payable (i) otherwise than exclusively in cash or (ii)
     exclusively in cash in an amount that would require any adjustment pursuant
     to Section 12.4; or

           (2) the Company shall authorize the granting to all or substantially
     all of the holders of its Common Stock of rights, options or warrants to
     subscribe for or purchase any shares of capital stock of any class or of
     any other rights; or

           (3) of any reclassification of the Common Stock, or of any
     consolidation, merger or share exchange to which the Company is a party and
     for which approval of any stockholders of the Company is required, or of
     the conveyance, sale, transfer or lease of all or substantially all of the
     assets of the Company; or

           (4) of the voluntary or involuntary dissolution, liquidation or
     winding up of the Company; then the Company shall cause to be filed at each
     office or agency maintained for the purpose of conversion of Securities
     pursuant to Section 10.2, and shall cause to be provided to all Holders in
     accordance with Section 1.6, at least 20 days (or 10 days in any case
     specified in clause (1) or (2) above) prior to the applicable record or
     effective date hereinafter specified, a notice stating (x) the date on
     which a record is to be taken for the purpose of such dividend,
     distribution, rights, options or warrants, or, if a record is not to be
     taken, the date as of which the holders of Common Stock of record to be
     entitled to such dividend, distribution, rights, options or warrants are to
     be determined or (y) the date on which such reclassification,
     consolidation, merger, conveyance, transfer, sale, lease, dissolution,
     liquidation or winding up is expected to become effective, and the date as
     of which it is expected that holders of Common Stock of record shall be
     entitled to exchange their shares of Common Stock for securities,
<PAGE>

                                     -99-

     cash or other property deliverable upon such reclassification,
     consolidation, merger, conveyance, transfer, sale, lease, dissolution,
     liquidation or winding up. Neither the failure to give such notice or the
     notice referred to in the following paragraph nor any defect therein shall
     affect the legality or validity of the proceedings described in clauses (1)
     through (4) of this Section 12.6. If at the time the Trustee shall not be
     the conversion agent, a copy of such notice shall also forthwith be filed
     by the Company with the Trustee.

          The Company shall cause to be filed at the Corporate Trust Office and
each office or agency maintained for the purpose of conversion of Securities
pursuant to Section 10.2, and shall cause to be provided to all Holders in
accordance with Section 1.6, notice of any tender offer by the Company or any
Subsidiary for all or any portion of the Common Stock at or about the time that
such notice of tender offer is provided to the public generally.

SECTION 12.7  Company to Reserve Common Stock.
              -------------------------------

          The Company shall at all times reserve and keep available, free from
preemptive rights, out of its authorized but unissued Common Stock, for the
purpose of effecting the conversion of Securities, the full number of shares of
Common Stock then issuable upon the conversion of all Outstanding Securities.

SECTION 12.8  Taxes on Conversions.
              --------------------

          Except as provided in the next sentence, the Company will pay any and
all taxes and duties that may be payable in respect of the issue or delivery of
shares of Common Stock on conversion of Securities pursuant hereto.  The Company
shall not, however, be required to pay any tax or duty which may be payable in
respect of any transfer involved in the issue and delivery of shares of Common
Stock in a name other than that of the Holder of the Security or Securities to
be converted, and no such issue or delivery shall be made unless and until the
Person requesting such issue has paid to the Company the amount of any such tax
or duty, or has established to the satisfaction of the Company that such tax or
duty has been paid.

SECTION 12.9  Covenant as to Common Stock.
              ---------------------------

          The Company agrees that all shares of Common Stock which may be
delivered upon conversion of Securities, upon such delivery, will have been duly
authorized and validly issued and will be fully paid and nonassessable and,
except as provided in Section 12.8, the Company will pay all taxes, liens and
charges with respect to the issue thereof.
<PAGE>

                                     -100-

SECTION 12.10  Cancellation of Converted Securities.
               ------------------------------------

          All Securities delivered for conversion shall be delivered to the
Trustee or its agent to be canceled by or at the direction of the Trustee, which
shall dispose of the same as provided in Section 3.9.

SECTION 12.11  Provision in Case of Consolidation, Merger or Sale of Assets.
               ------------------------------------------------------------

          In case of any consolidation or merger of the Company with or into any
other Person, any merger of another Person with or into the Company (other than
a merger which does not result in any reclassification, conversion, exchange or
cancellation of outstanding shares of Common Stock of the Company) or any
conveyance, sale, transfer or lease of all or substantially all of the assets of
the Company, the Person formed by such consolidation or resulting from such
merger or which acquires such assets, as the case may be, shall execute and
deliver to the Trustee a supplemental indenture providing that the Holder of
each Security then Outstanding shall have the right thereafter, during the
period such Security shall be convertible as specified in Section 12.1, to
convert such Security only into the kind and amount of securities, cash and
other property receivable upon such consolidation, merger, conveyance, sale,
transfer or lease by a holder of the number of shares of Common Stock of the
Company into which such Security might have been converted immediately prior to
such consolidation, merger, conveyance, sale, transfer or lease, assuming such
holder of Common Stock of the Company (i) is not (A) a Person with which the
Company consolidated or merged with or into or which merged into or with the
Company or to which such conveyance, sale, transfer or lease was made, as the
case may be (a "Constituent Person"), or (B) an Affiliate of a Constituent
Person and (ii) failed to exercise his rights of election, if any, as to the
kind or amount of securities, cash and other property receivable upon such
consolidation, merger, conveyance, sale, transfer or lease (provided that if the
kind or amount of securities, cash and other property receivable upon such
consolidation, merger, conveyance, sale, transfer, or lease is not the same for
each share of Common Stock of the Company held immediately prior to such
consolidation, merger, conveyance, sale, transfer or lease by others than a
Constituent Person or an Affiliate thereof and in respect of which such rights
of election shall not have been exercised ("Non-electing Share"), then for the
purpose of this Section 12.11 the kind and amount of securities, cash and other
property receivable upon such consolidation, merger, conveyance, sale, transfer
or lease by the holders of each Non-electing Share shall be deemed to be the
kind and amount so receivable per share by a plurality of the Non-electing
Shares).  Such supplemental indenture shall provide for adjustments which, for
events subsequent to the effective date of such supplemental indenture, shall be
as nearly equivalent as may be practicable to the adjustments provided for in
this Article.  The above provisions of this Section 12.11 shall similarly apply
to successive consolidations, mergers, conveyances, sales, transfers or leases.
Notice of the execution of such a supplemental indenture shall be given by the
Company to the Holder of each Security as provided in Section 1.6 promptly upon
such execution.
<PAGE>

                                     -101-

          Neither the Trustee nor any Conversion Agent shall be under any
responsibility to determine the correctness of any provisions contained in any
such supplemental indenture relating either to the kind or amount of shares of
stock or other securities or property or cash receivable by Holders of
Securities upon the conversion of their Securities after any such consolidation,
merger, conveyance, transfer, sale or lease or to any such adjustment, but may
accept as conclusive evidence of the correctness of any such provisions, and
shall be protected in relying upon, an Opinion of Counsel and an Officers'
Certificate with respect thereto, which the Company shall cause to be furnished
to the Trustee.

SECTION 12.12  Rights Issued in Respect of Common Stock.
               ----------------------------------------

          Rights or warrants distributed by the Company to all holders of
Common Stock entitling the holders thereof to subscribe for or purchase shares
of the Company's capital stock (either initially or under certain
circumstances), which rights or warrants, until the occurrence of a specified
event or events ("Trigger Event"):
                  -------------

          (i)    are deemed to be transferred with such shares of Common
     Stock,

          (ii)   are not exercisable, and

          (iii)  are also issued in respect of future issuances of Common
     Stock

shall not be deemed distributed for purposes of Sections 12.4(2) and 12.4(4)
until the occurrence of the earliest Trigger Event.  In addition, in the event
of any distribution of rights or warrants, or any Trigger Event with respect
thereto, that shall have resulted in an adjustment to the Conversion Rate under
Section 12.4(2), (1) in the case of any such rights or warrants which shall all
have been redeemed or repurchased without exercise by any holders thereof, the
Conversion Rate shall be readjusted upon such final redemption or repurchase to
give effect to such distribution or Trigger Event, as the case may be, as though
it were a cash distribution, equal to the per share redemption or repurchase
price received by a holder of Common Stock with respect to such rights or
warrants (assuming such holder had retained such rights or warrants), made to
all holders of Common Stock as of the date of such redemption or repurchase, and
(2) in the case of any such rights or warrants all of which shall have expired
without exercise by any holder thereof, the Conversion Price shall be readjusted
as if such issuance had not occurred.

SECTION 12.13  Responsibility of Trustee for Conversion Provisions.
               ---------------------------------------------------

          The Trustee, subject to the provisions of Section 6.1, and any
Conversion Agent shall not at any time be under any duty or responsibility to
any Holder of Securities to determine whether any facts exist which may require
any adjustment of the Conversion Rate, or with respect to the nature or extent
of any such adjustment when made, or with respect to
<PAGE>

                                     -102-

the method employed, herein or in any supplemental indenture provided to be
employed, in making the same, or whether a supplemental indenture need be
entered into. Neither the Trustee, subject to the provisions of Section 6.1, nor
any Conversion Agent shall be accountable with respect to the validity or value
(or the kind or amount) of any Common Stock, or of any other securities or
property or cash, which may at any time be issued or delivered upon the
conversion of any Security; and it or they do not make any representation with
respect thereto. Neither the Trustee, subject to the provisions of Section 6.1,
nor any Conversion Agent shall be responsible for any failure of the Company to
make or calculate any cash payment or to issue, transfer or deliver any shares
of Common Stock or share certificates or other securities or property or cash
upon the surrender of any Security for the purpose of conversion; and the
Trustee, subject to the provisions of Section 6.1, and any Conversion Agent
shall not be responsible for any failure of the Company to comply with any of
the covenants of the Company contained in this Article.

                                 ARTICLE XIII

                          SUBORDINATION OF SECURITIES

SECTION 13.1   Securities Subordinate to Senior Debt.
               -------------------------------------

            The Company covenants and agrees, and each Holder of a Security, by
its acceptance thereof, likewise covenants and agrees, that, to the extent and
in the manner hereinafter set forth in this Article (subject to the provisions
of Article IV), the indebtedness represented by the Securities and the payment
of the principal of, or premium, if any, or interest (including Liquidated
Damages, if any) on, each and all of the Securities (including, but not limited
to, the Redemption Price with respect to the Securities to be called for
redemption in accordance with Article XI or the Repurchase Price with respect to
Securities submitted for repurchase in accordance with Article XV), are hereby
expressly made subordinate and subject in right of payment to the prior payment
in full of all Senior Debt.

SECTION 13.2   No Payment in Certain Circumstances, Payment Over of Proceeds
               upon Dissolution, Etc.
               -------------------------------------------------------------

            No payment shall be made with respect to the principal of, or
premium, if any, or interest (including Liquidated Damages, if any) on the
Securities (including, but not limited to, the Redemption Price with respect to
the Securities to be called for redemption in accordance with Article XI or the
Repurchase Price with respect to Securities submitted for repurchase in
accordance with Article XV), except payments and distributions made by the
Trustee as permitted by Section 13.9, if:
<PAGE>

                                     -103-

            (i)    a default in the payment of principal, premium, if any, or
     interest (including a default under any repurchase or redemption
     obligation) or other amounts with respect to any Senior Debt occurs and is
     continuing (or, in the case of Senior Debt for which there is a period of
     grace, in the event of such a default that continues beyond the period of
     grace, if any, specified in the instrument or lease evidencing such Senior
     Debt) unless and until such default shall have been cured or waived or
     shall have ceased to exist; or

            (ii)   any other event of default occurs and is continuing with
     respect to Designated Senior Debt that then permits holders of such
     Designated Senior Debt to accelerate its maturity and the Trustee receives
     a Payment Blockage Notice from a Representative or holder of Designated
     Senior Debt or the Company.

            If the Trustee receives any Payment Blockage Notice pursuant to
clause (ii) above, no subsequent Payment Blockage Notice shall be effective for
purposes of this Section unless and until (A) at least 365 days shall have
elapsed since the initial effectiveness of the immediately prior Payment
Blockage Notice, and (B) all scheduled payments of principal, premium, if any,
and interest on the Securities that have come due have been paid in full in
cash. No nonpayment default that existed or was continuing on the date of
delivery of any Payment Blockage Notice to the Trustee shall be, or be made, the
basis for a subsequent Payment Blockage Notice.

            The Company may and shall resume payments on and distributions in
respect of the Securities upon the earlier of:

            (1)    in the case of a default referred to in clause (i) above, the
     date upon which the default is cured or waived or ceases to exist, or

            (2)    in the case of a default referred to in clause (ii) above,
     the earlier of (a) the date upon which the default is cured or waived or
     ceases to exist or (b) 179 days pass after notice is received if the
     maturity of such Designated Senior Debt has not been accelerated, unless
     this Article XIII otherwise prohibits the payment or distribution at the
     time of such payment or distribution.

            In the event of (a) any insolvency or bankruptcy case or proceeding,
or any receivership, liquidation, reorganization or other similar case or
proceeding in connection therewith, relative to the Company or to its creditors,
as such, or to its assets, or (b) any liquidation, dissolution or other winding
up of the Company, whether voluntary or involuntary and whether or not involving
insolvency or bankruptcy, or (c) any assignment for the benefit of creditors or
any other marshaling of assets and liabilities of the Company, then and in any
such event the holders of Senior Debt shall be entitled to receive payment in
full of all amounts due or to become due on or in respect of all Senior Debt in
cash before the Holders of the Securities are
<PAGE>

                                     -104-

entitled to receive any payment on account of principal of (or premium, if any)
or interest (including any Liquidated Damages) on the Securities or on account
of the purchase, redemption or other acquisition of Securities, and to that end
the holders of Senior Debt shall be entitled to receive, for application to the
payment thereof, any payment or distribution of any kind or character, whether
in cash, property or securities, which may be payable or deliverable in respect
of the Securities in any such case, proceeding, dissolution, liquidation or
other winding up or event.

            In the event that, notwithstanding the foregoing provisions of this
Section, the Trustee or the Holder of any Security shall have received any
payment or distribution of assets of the Company of any kind or character,
whether in cash, securities or other property, before all Senior Debt is paid in
full, and if such fact shall, at or prior to the time of such payment or
distribution, have been made known to the Trustee or, as the case may be, such
Holder, then and in such event such payment or distribution shall be paid over
or delivered forthwith to the trustee in bankruptcy, receiver, liquidating
trustee, custodian, assignee, agent or other Person making payment or
distribution of assets of the Company for application to the payment of all
Senior Debt remaining unpaid, to the extent necessary to pay all Senior Debt in
full, after giving effect to any concurrent payment or distribution to or for
the holders of Senior Debt.

            For purposes of this Article only, the words "cash, securities or
other property" shall not be deemed to include shares of capital stock of the
Company as reorganized or readjusted, or securities of the Company or any other
corporation provided for by a plan of reorganization or readjustment, which
shares of stock or securities are subordinated in right of payment to all then
outstanding Senior Debt to substantially the same extent as, or to a greater
extent than, the Securities are so subordinated as provided in this Article.
The consolidation of the Company with, or the merger of the Company into,
another Person or the liquidation or dissolution of the Company following the
conveyance or transfer of its properties and assets substantially as an entirety
to another Person upon the terms and conditions set forth in Article VII shall
not be deemed a dissolution, winding up, liquidation, reorganization, assignment
for the benefit of creditors or marshaling of assets and liabilities of the
Company for the purposes of this Section if the Person formed by such
consolidation or into which the Company is merged or which acquires by
conveyance or transfer such properties and assets substantially as an entirety,
as the case may be, shall, as a part of such consolidation, merger, conveyance
or transfer, comply with the conditions set forth in Article VII.

            In the event that, notwithstanding the foregoing, the Company shall
make any payment to the Trustee or the Holder of any Security prohibited by the
foregoing provisions of this Section, and if such fact shall, at or prior to the
time of such payment, have been made known to the Trustee or, as the case may
be, such Holder, then and in such event such payment shall be paid over and
delivered forthwith to the Company, in the case of the Trustee, or the Trustee,
in the case of such Holder.
<PAGE>

                                     -105-

SECTION 13.3   Prior Payment to Senior Debt upon Acceleration of Securities.
               ------------------------------------------------------------

            In the event of the acceleration of the Securities because of an
Event of Default, no payment or distribution shall be made to the Trustee or any
Holder of Securities in respect of the principal of, premium, if any, or
interest (including Liquidated Damages, if any) on the Securities (including,
but not limited to, the Redemption Price with respect to the Securities called
for redemption in accordance with Article XI or the Repurchase Price with
respect to the Securities submitted for repurchase in accordance with Article
XV), except payments and distributions made by the Trustee as permitted by
Section 13.9, until all Senior Debt has been paid in full in cash or other
payment satisfactory to the holders of Senior Debt or such acceleration is
rescinded in accordance with the terms of this Indenture. If payment of the
Securities is accelerated because of an Event of Default, the Company shall
promptly notify holders of Senior Debt of the acceleration.

SECTION 13.4   Payment Permitted if No Default.
               -------------------------------

            Nothing contained in this Article or elsewhere in this Indenture or
in any of the Securities shall prevent (a) the Company, at any time except
during the pendency of any case, proceeding, dissolution, liquidation or other
winding up, assignment for the benefit of creditors or other marshaling of
assets and liabilities of the Company referred to in Section 13.2, or during the
circumstances referred to in the first paragraph of Section 13.2, or under the
conditions described in Section 13.3, from making payments at any time of
principal of (and premium, if any) or interest on the Securities (including, but
not limited to, the Redemption Price with respect to the Securities called for
redemption in accordance with Article XI or the Repurchase Price with respect to
the Securities submitted for repurchase in accordance with Article XV), or (b)
the application by the Trustee of any money deposited with it hereunder to the
payment of or on account of the principal of (and premium, if any) or interest
on the Securities (including, but not limited to, the Redemption Price with
respect to the Securities called for redemption in accordance with Article XI or
the Repurchase Price with respect to the Securities submitted for repurchase in
accordance with Article XV), or the retention of such payment by the Holders,
if, at the time of such application by the Trustee, it did not have knowledge
that such payment would have been prohibited by the provisions of this Article.

SECTION 13.5   Subrogation to Rights of Holders of Senior Debt.
               -----------------------------------------------

            Subject to the payment in full of all Senior Debt, the Holders of
the Securities shall be subrogated to the extent of the payments or
distributions made to the holders of such Senior Debt pursuant to the provisions
of this Article to the rights of the holders of such Senior Debt to receive
payments and distributions of cash, property and securities applicable to the
Senior Debt until the principal of (and premium, if any) and interest on the
Securities shall be paid in full. For purposes of such subrogation, no payments
or distributions to the holders of the Senior Debt of any cash, property or
securities to which the Holders of the Securities or
<PAGE>

                                     -106-

the Trustee would be entitled except for the provisions of this Article, and no
payments over pursuant to the provisions of this Article to the holders of
Senior Debt by Holders of the Securities or the Trustee, shall, as among the
Company, its creditors other than holders of Senior Debt and the Holders of the
Securities, be deemed to be a payment or distribution by the Company to or on
account of the Senior Debt.

SECTION 13.6   Provisions Solely to Define Relative Rights.
               -------------------------------------------

            The provisions of this Article are and are intended solely for the
purpose of defining the relative rights of the Holders of the Securities on the
one hand and the holders of Senior Debt on the other hand.  Nothing contained in
this Article or elsewhere in this Indenture or in the Securities is intended to
or shall (i) impair, as among the Company, its creditors other than holders of
Senior Debt and the Holders of the Securities, the obligation of the Company,
which is absolute and unconditional, to pay to the Holders of the Securities the
principal of (and premium, if any) and interest (including Liquidated Damages,
if any) on the Securities as and when the same shall become due and payable in
accordance with their terms; or (ii) affect the relative rights against the
Company of the Holders of the Securities and creditors of the Company other than
the holders of Senior Debt; or (iii) prevent the Trustee or the Holder of any
Security from exercising all remedies otherwise permitted by applicable law upon
default under this Indenture, subject to the rights, if any, under this Article
of the holders of Senior Debt to receive cash, property and securities otherwise
payable or deliverable to the Trustee or such Holder.

SECTION 13.7   Trustee to Effectuate Subordination.
               -----------------------------------

            Each Holder of a Security by its acceptance thereof authorizes and
directs the Trustee on its behalf to take such action as may be necessary or
appropriate to effectuate the subordination provided in this Article and
appoints the Trustee its attorney-in-fact for any and all such purposes.

SECTION 13.8   No Waiver of Subordination Provisions.
               -------------------------------------

            No right of any present or future holder of any Senior Debt to
enforce subordination as herein provided shall at any time in any way be
prejudiced or impaired by any act or failure to act on the part of the Company,
or by any non-compliance by the Company with the terms, provisions and covenants
of this Indenture, regardless of any knowledge thereof any such holder may have
or be otherwise charged with .

            Without in any way limiting the generality of the foregoing
paragraph, the holders of Senior Debt may, at any time and from time to time,
without the consent of or notice to the Trustee or the Holders of the
Securities, without incurring responsibility to the Holders of the Securities
and without impairing or releasing the subordination provided in this Article or
<PAGE>

                                     -107-

the obligations hereunder of the Holders of the Securities to the holders of
Senior Debt, do any one or more of the following: (i) change the manner, place
or terms of payment or extend the time of payment of, or renew or alter, Senior
Debt, or otherwise amend or supplement in any manner Senior Debt or any
instrument evidencing the same or any agreement under which Senior Debt is
outstanding; (ii) sell, exchange, release or otherwise deal with any property
pledged, mortgaged or otherwise securing Senior Debt; (iii) release any Person
liable in any manner for the collection of Senior Debt; and (iv) exercise or
refrain from exercising any rights against the Company and any other Person.

SECTION 13.9   Notice to Trustee.
               -----------------

            The Company shall give prompt written notice to the Trustee of any
fact known to the Company which would prohibit the making of any payment to or
by the Trustee in respect of the Securities.  Notwithstanding the provisions of
this Article or any other provision of this Indenture, the Trustee shall not be
charged with knowledge of the existence of any facts which would prohibit the
making of any payment to or by the Trustee in respect of the Securities, unless
and until a Responsible Officer of the Trustee shall have received written
notice thereof from the Company or a Representative or a holder of Senior Debt
(including, without limitation, a holder of Designated Senior Debt) and, prior
to the receipt of any such written notice, the Trustee, subject to the
provisions of Section 6.1, shall be entitled in all respects to assume that no
such facts exist; provided, however, that if the Trustee shall not have received
the notice provided for in this Section 13.9 at least two Business Days prior to
the date upon which by the terms hereof any money may become payable for any
purpose (including, without limitation, the payment of the principal of (and
premium, if any) or interest (including Liquidated Damages, if any) on any
Security), then, anything herein contained to the contrary notwithstanding, the
Trustee shall have full power and authority to receive such money and to apply
the same to the purpose for which such money was received and shall not be
affected by any notice to the contrary which may be received by it within one
Business Day prior to such date.

            Notwithstanding anything in this Article XIII to the contrary,
nothing shall prevent any payment by the Trustee to the Holders of monies
deposited with it pursuant to Section 4.1, and any such payment shall not be
subject to the provisions of Section 13.2 or 13.3.

            Subject to the provisions of Section 6.1, the Trustee shall be
entitled to rely on the delivery to it of a written notice by a Person
representing himself to be a Representative or a holder of Senior Debt
(including, without limitation, a holder of Designated Senior Debt) to establish
that such notice has been given by a Representative or a holder of Senior Debt
(including, without limitation, a holder of Designated Senior Debt).  In the
event that the Trustee determines in good faith that further evidence is
required with respect to the right of any Person as a holder of Senior Debt to
participate in any payment or distribution pursuant to this
<PAGE>

                                     -108-

Article, the Trustee may request such Person to furnish evidence to the
reasonable satisfaction of the Trustee as to the amount of Senior Debt held by
such Person, the extent to which such Person is entitled to participate in such
payment or distribution and any other facts pertinent to the rights of such
Person under this Article, and if such evidence is not furnished, the Trustee
may defer any payment to such Person pending judicial determination as to the
right of such Person to receive such payment.

SECTION 13.10  Reliance on Judicial Order or Certificate of Liquidation Agent.
               --------------------------------------------------------------

            Upon any payment or distribution of assets of the Company referred
to in this Article, the Trustee, subject to the provisions of Section 6.1, and
the Holders of the Securities shall be entitled to rely upon any order or decree
entered by any court of competent jurisdiction in which such insolvency,
bankruptcy, receivership, liquidation, reorganization, dissolution, winding up
or similar case or proceeding is pending, or a certificate of the trustee in
bankruptcy, receiver, liquidating trustee, custodian, assignee for the benefit
of creditors, agent or other Person making such payment or distribution,
delivered to the Trustee or to the Holders of Securities, for the purpose of
ascertaining the Persons entitled to participate in such payment or
distribution, the holders of the Senior Debt and other indebtedness of the
Company, the amount thereof or payable thereon, the amount or amounts paid or
distributed thereon and all other facts pertinent thereto or to this Article.

SECTION 13.11  Trustee Not Fiduciary for Holders of Senior Debt.
               ------------------------------------------------

            The Trustee shall not be deemed to owe any fiduciary duty to the
holders of Senior Debt and shall not be liable to any such holders if it shall
in good faith mistakenly pay over or distribute to Holders of Securities or to
the Company or to any other Person cash, property or securities to which any
holders of Senior Debt shall be entitled by virtue of this Article or otherwise.

SECTION 13.12  Reliance by Holders of Senior Debt on Subordination Provisions.
               --------------------------------------------------------------

            Each Holder by accepting a Security acknowledges and agrees that the
foregoing subordination provisions are, and are intended to be, an inducement
and a consideration to each holder of any Senior Debt, whether such Senior Debt
was created or acquired before or after the issuance of the Securities, to
acquire and continue to hold, or to continue to hold, such Senior Debt and such
holder of Senior Debt shall be deemed conclusively to have relied on such
subordination provisions in acquiring and continuing to hold, or in continuing
to hold, such Senior Debt, and no amendment or modification of the provisions
contained herein shall diminish the rights of such holders of Senior Debt unless
such holders shall have agreed in writing thereto.
<PAGE>

                                     -109-

SECTION 13.13  Rights of Trustee as Holder of Senior Debt; Preservation of
               Trustee's Rights.
               -----------------------------------------------------------

            The Trustee in its individual capacity shall be entitled to all the
rights set forth in this Article with respect to any Senior Debt which may at
any time be held by it, to the same extent as any other holder of Senior Debt,
and nothing in this Indenture shall deprive the Trustee of any of its rights as
such holder.

            Nothing in this Article shall apply to claims of, or payments to,
the Trustee under or pursuant to Section 6.7.

SECTION 13.14  Article Applicable to Paying Agents.
               -----------------------------------

            In case at any time any Paying Agent other than the Trustee shall
have been appointed by the Company and be then acting hereunder, the term
"Trustee" as used in this Article shall in such case (unless the context
otherwise requires) be construed as extending to and including such Paying Agent
within its meaning as fully for all intents and purposes as if such Paying Agent
were named in this Article in addition to or in place of the Trustee; provided,
however, that Section 13.13 shall not apply to the Company or any Affiliate of
the Company if it or such Affiliate acts as Paying Agent.

SECTION 13.15  Certain Conversions and Repurchases Deemed Payment.
               --------------------------------------------------

            For the purposes of this Article only, (i) the issuance and delivery
of junior securities upon conversion of Securities in accordance with Article
XII or upon the repurchase of Securities in accordance with Article XV shall not
be deemed to constitute a payment or distribution on account of the principal of
or premium or interest (including Liquidated Damages, if any) on Securities or
on account of the purchase or other acquisition of Securities, and (ii) the
payment, issuance or delivery of cash (except in satisfaction of fractional
shares pursuant to Section 12.3 or 14.3(7)), property or securities (other than
junior securities) upon conversion of a Security shall be deemed to constitute
payment on account of the principal of such Security.  For the purposes of this
Section, the term "junior securities" means (a) shares of any stock of any class
of the Company and securities into which the Securities are convertible pursuant
to Article XII and (b) securities of the Company which are subordinated in right
of payment to all Senior Debt which may be outstanding at the time of issuance
or delivery of such securities to substantially the same extent as, or to a
greater extent than, the Securities are so subordinated as provided in this
Article.  Nothing contained in this Article or elsewhere in this Indenture or in
the Securities is intended to or shall impair, as among the Company, its
creditors other than holders of Senior Debt and the Holders of the Securities,
the right, which is absolute and unconditional, of the Holder of any Security to
convert such Security in accordance with Article XII or to exchange such
Security for Common Stock in accordance with Article
<PAGE>

                                     -110-

XV if the Company elects to satisfy the obligations under Article XV by the
delivery of Common Stock.

                                  ARTICLE XIV

                            GUARANTEE OF SECURITIES

SECTION 14.1   Unconditional Guarantee.
               -----------------------

            The Subsidiary Guarantor hereby unconditionally guarantees (such
guarantee to be referred to herein as the "Guarantee") to each Holder of a
                                           ---------
Security authenticated and delivered by the Trustee and to the Trustee and its
successors and assigns, the Securities or the obligations of the Company
hereunder or thereunder, that: (i) the principal of premium, if any, and
interest on the Securities will be promptly paid in full when due, subject to
any applicable grace period, whether at maturity, by acceleration or otherwise,
and interest on the overdue principal, if any, and interest on any interest, to
the extent lawful, of the Securities and all other obligations of the Company to
the Holders or the Trustee hereunder or thereunder will be promptly paid in
full, all in accordance with the terms hereof and thereof; and (ii) in case of
any extension of time of payment or renewal of any Securities or of any such
other obligations, the same will be promptly paid in full when due in accordance
with the terms of the extension or renewal, subject to any applicable grace
period, whether at stated maturity, by acceleration or otherwise, subject,
however, in the case of clauses (i) and (ii) above, to the limitations set forth
in Section 14.5. The Subsidiary Guarantor hereby agrees that its obligations
hereunder shall be unconditional, irrespective of the validity, regularity or
enforceability of the Securities or this Indenture, the absence of any action to
enforce the same, any waiver or consent by any Holder of the Securities with
respect to any provisions hereof or thereof, the recovery of any judgment
against the Company, any action to enforce the same or any other circumstances
which might otherwise constitute a legal or equitable discharge or defense of a
guarantor. The Subsidiary Guarantor hereby waives diligence, presentment, demand
of payment, filing of claims with a court in the event of insolvency or
bankruptcy of the Company, any right to require a proceeding first against the
Company, protest, notice and all demands whatsoever and covenants that this
Guarantee will not be discharged except by complete performance of the
obligations contained in the Securities, this Indenture and in this Guarantee.
If any Holder or the Trustee is required by any court or otherwise to return to
the Company, the Subsidiary Guarantor, or any custodian, trustee, liquidator or
other similar official acting in relation to the Company or the Subsidiary
Guarantor, any amount paid by the Company or the Subsidiary Guarantor to the
Trustee or such Holder, this Guarantee, to the extent theretofore discharged,
shall be reinstated in full force and effect as to such amount only. The
Subsidiary Guarantor further agrees that, as between the Subsidiary Guarantor,
on the one hand, and the Holders and the Trustee, on the other hand, (x) the
maturity of the obligations guaranteed hereby may be accelerated as
<PAGE>

                                     -111-

provided in Section 5.2 for the purposes of this Guarantee, notwithstanding any
stay, injunction or other prohibition preventing such acceleration in respect of
the obligations guaranteed hereby, and (y) in the event of any acceleration of
such obligations as provided in Section 5.2, such obligations (whether or not
due and payable) shall forthwith become due and payable by the Subsidiary
Guarantor for the purpose of this Guarantee.

SECTION 14.2   Subordination of Guarantee.
               --------------------------

            The Subsidiary Guarantor agrees, and each Holder by accepting a
Guarantee agrees, that all obligations owed under and in respect of such
Guarantee are subordinated in right of payment, to the extent and in the manner
provided in this Article XIV, to the prior indefeasible payment in full in cash
or cash equivalents of all Guarantor Senior Debt, and that the subordination of
the Guarantee pursuant to this Article XIV is for the benefit of all holders of
all Guarantor Senior Debt of the Subsidiary Guarantor, whether outstanding on
the Issue Date or issued thereafter.

SECTION 14.3   Severability.
               ------------

            In case any provision of this Guarantee shall be invalid, illegal or
unenforceable, the validity, legality and enforceability of the remaining
provisions shall not in any way be affected or impaired thereby.

SECTION 14.4   Release of the Subsidiary Guarantor.
               -----------------------------------

            The Guarantee of the Subsidiary Guarantor hereunder shall no longer
have any force or effect if the Subsidiary Guarantor (i) consolidates, merges or
otherwise conveys, transfers or disposes of all or substantially all of its
assets to the Company or (ii) conveys, transfers, sells or otherwise disposes of
all or substantially all of its assets or capital stock in a transaction that
satisfies the requirements of Section 14.6(b) hereunder.

SECTION 14.5   Limitation of Subsidiary Guarantor's Liability.
               ----------------------------------------------

            The Subsidiary Guarantor and by its acceptance hereof each Holder
hereby confirms that it is the intention of all such parties that the Guarantee
does not constitute a fraudulent transfer or conveyance under federal or state
law.  To effectuate the foregoing intention, the Holders and the Subsidiary
Guarantor hereby irrevocably agree that the obligations of the Subsidiary
Guarantor under the Guarantee shall be limited to the maximum amount as will,
after giving effect to all other contingent and fixed liabilities of the
Subsidiary Guarantor, result in the obligations under the Guarantee not
constituting such fraudulent transfer or conveyance.
<PAGE>

                                     -112-

SECTION 14.6   Subsidiary Guarantor May Consolidate, Etc., on Certain Terms.
               ------------------------------------------------------------

            (a)  Nothing contained in this Indenture or in any of the Securities
shall prevent any consolidation or merger of the Subsidiary Guarantor with or
into the Company or shall prevent any sale or conveyance of the assets of the
Subsidiary Guarantor to the Company.  Upon any such consolidation, merger, sale
or conveyance, the Subsidiary Guarantor will be released from its Guarantee in
accordance with Section 14.4 hereof.

            (b)  The Subsidiary Guarantor shall not (i) consolidate with or
merge into any other Person or convey, transfer, sell or lease all its
properties and assets substantially as an entirety to any Person, (ii) permit
any Person to consolidate with or merge into the Subsidiary Guarantor or (iii)
convey, transfer, sell or lease such Person's properties and assets
substantially as an entirety to the Subsidiary Guarantor unless:

            (1)    in the case of a transaction under clauses (i) and (ii)
     above, the Person formed by such consolidation into or with which the
     Subsidiary Guarantor is merged or the Person to which the properties and
     assets of the Subsidiary Guarantor are so conveyed, transferred, sold or
     leased shall be a corporation, limited liability company, partnership or
     trust organized and validly existing under the laws of the United States of
     America, any State thereof or the District of Columbia and, if other than
     the Subsidiary Guarantor, shall expressly assume, by a supplemental
     indenture hereto, executed and delivered to the Trustee, in form reasonably
     satisfactory to the Trustee, all the obligations under the Guarantee hereof
     including the performance or observance of every covenant of this Indenture
     on the part of the Subsidiary Guarantor to be performed or observed;

            (2)    immediately after giving effect to such transaction, no Event
     of Default, and no event that after notice or lapse of time or both, would
     become an Event of Default, shall have occurred and be continuing; and

            (3)    in the case of a transaction under clauses (i) and (ii)
     above, the Company has delivered to the Trustee an Officers' Certificate
     and an Opinion of Counsel, each stating that such consolidation, merger,
     conveyance, transfer, sale or lease and, if a supplemental indenture is
     required in connection with such transaction, such supplemental indenture
     comply with this Article XIV and that all conditions precedent herein
     provided for relating to such transaction have been complied with, together
     with any documents required under Section 8.3.

SECTION 14.7   Successor Substituted.
               ---------------------

            Upon any consolidation of the Subsidiary Guarantor with, or merger
of the Subsidiary Guarantor into any other Person or any conveyance, transfer,
sale or lease of all or
<PAGE>

                                     -113-

substantially all the properties and assets of the Subsidiary Guarantor in
accordance with Section 14.6(b), the successor Person formed by such
consolidation into or with which the Subsidiary Guarantor is merged or to which
such conveyance, transfer, sale or lease is made shall succeed to, and be
substituted for, and may exercise every right and power of, the Subsidiary
Guarantor under this Indenture with the same effect as if such successor Person
had been named as the Subsidiary Guarantor herein, and thereafter, except in the
case of a lease, the predecessor Person shall be relieved of all obligations and
covenants under the Guarantee and this Indenture.

SECTION 14.8   Waiver of Subrogation.
               ---------------------

            Until the payment in full of Securities, the Subsidiary Guarantor
shall have no right to make any claims or exercise any other rights which it may
now or hereafter acquire against the Company that arise from the existence,
payment, performance or enforcement of the Subsidiary Guarantor's obligations
under this Guarantee and this Indenture, including, without limitation, any
right of subrogation, reimbursement, exoneration, indemnification, and any right
to participate in any claim or remedy of any Holder of Securities against the
Company, whether or not such claim, remedy or right arises in equity, or under
contract, statute or common law, including, without limitation, the right to
take or receive from the Company, directly or indirectly, in cash or other
property or by set-off or in any other manner, payment or security on account of
such claim or other rights.  If any amount shall be paid to the Subsidiary
Guarantor in violation of the preceding sentence and the Securities shall not
have been paid in full, such amount shall have been deemed to have been paid to
the Subsidiary Guarantor for the benefit of, and held in trust for the benefit
of, the Holders of the Securities, and shall forthwith be paid to the Trustee
for the benefit of such Holders to be credited and applied upon the Securities,
whether matured or unmatured, in accordance with the terms of this Indenture.
The Subsidiary Guarantor acknowledges that it will receive direct and indirect
benefits from the financing arrangements contemplated by this Indenture and that
the waiver set forth in this Section 14.8 is knowingly made in contemplation of
such benefits.

SECTION 14.9   Execution of Guarantee.
               ----------------------

            To evidence its guarantee to the Holders specified in Section 14.1,
the Subsidiary Guarantor hereby agrees to execute the Guarantee in substantially
the form found in Section 2.2 hereof recited to be endorsed on each Security
ordered to be authenticated and delivered by the Trustee.  The Subsidiary
Guarantor hereby agrees that its Guarantee set forth in Section 14.1 shall
remain in full force and effect notwithstanding any failure to endorse on each
Security a notation of such Guarantee.  The Guarantee shall be signed on behalf
of the Subsidiary Guarantor by an officer of the Subsidiary Guarantor (who shall
have been duly authorized by all requisite corporate actions) prior to the
authentication of the Security on which it is endorsed, and the delivery of such
Security by the Trustee, after the authentication thereof
<PAGE>

                                     -114-

hereunder, shall constitute due delivery of such Guarantee on behalf of the
Subsidiary Guarantor. Such signatures upon the Guarantee may be by manual or
facsimile signature of such officer and may be imprinted or otherwise reproduced
on the Guarantee, and in case any such officer who shall have signed the
Guarantee shall cease to be such officer before the Security on which such
Guarantee is endorsed shall have been authenticated and delivered by the Trustee
or disposed of by the Company, such Security nevertheless may be authenticated
and delivered or disposed of as though the person who signed the Guarantee had
not ceased to be such officer of the Subsidiary Guarantor.

SECTION 14.10  No Payment on Guarantee in Certain Circumstances.
               ------------------------------------------------

            (a)    If (i) any default occurs and is continuing in the payment
when due, whether at maturity, upon any redemption, by declaration or otherwise,
of any principal of, interest on, or other amounts due and owing on, any
Guarantor Senior Debt or (ii) any default occurs and is continuing with respect
to any Designated Guarantor Senior Debt resulting in the acceleration of the
maturity of all or any portion of such Designated Guarantor Senior Debt, no
payment shall be made by or on behalf of the Subsidiary Guarantor or any other
Person on its behalf with respect to any obligations on the Securities or any of
the obligations of the Subsidiary Guarantor on its Guarantee, or to acquire any
of the Securities for cash or property or otherwise, except out of a trust
theretofore established pursuant to the provisions of Section 4.2 hereof
(provided that payment into such trust was not made during any period in which
payment on the Securities is blocked pursuant to the subordination provisions of
this Indenture). In addition, if any other event of default occurs and is
continuing (or if such an event of default would occur upon any payment with
respect to the Securities) with respect to the Designated Guarantor Senior Debt,
as such event of default is defined in the instrument creating or evidencing
such Designated Guarantor Senior Debt permitting the holders of such Designated
Guarantor Senior Debt then outstanding, or their Representative, to accelerate
the maturity thereof and if the Representative for the Designated Guarantor
Senior Debt gives written notice of the event of default to the Trustee (a
"Guarantor Default Notice"), then, unless and until the date, if any, on which
 ------------------------
all Designated Guarantor Senior Debt to which such event of default relates is
discharged or the Representative for the Designated Guarantor Senior Debt gives
notice that all events of default have been cured or waived or have ceased to
exist or the Trustee receives written notice from the Representative for the
Designated Senior Guarantor Debt terminating the Guarantor Blockage Period (as
defined below), during the 179 days after the delivery of such Guarantor Default
Notice (the "Guarantor Blockage Period"), neither the Subsidiary Guarantor nor
             -------------------------
any other Person on its behalf shall (x) make any payment with respect to any
obligations on the Securities or under the Guarantee or (y) acquire any of the
Securities for cash or property or otherwise. Notwithstanding anything herein to
the contrary, in no event will a Guarantor Blockage Period extend beyond 179
days from the date the payment on the Securities was due. Only one such
Guarantor Blockage Period may be commenced within any 360 consecutive days. For
all purposes of this Section 14.10(a), no event of
<PAGE>

                                     -115-

default which existed or was continuing (it being acknowledged that any action
of the Company or its subsidiaries occurring subsequent to delivery of a Payment
Blockage Notice that would give rise to any event of default pursuant to any
provision under which an event of default previously existed (or was continuing
at the time of delivery of such Payment Blockage Notice) shall constitute a new
event of default for this purpose) on the date of the commencement of any
Guarantor Blockage Period with respect to the Designated Guarantor Senior Debt
shall be, or be made, the basis for the commencement of a second Guarantor
Blockage Period by the Representative of the Designated Guarantor Senior Debt
whether or not within a period of 360 consecutive days, unless such event of
default shall have been cured or waived for a period of not less than 90
consecutive days.

            (b)    In the event that, notwithstanding the foregoing, any payment
shall be received by the Trustee or any Holder when such payment is prohibited
by Section 14.10(a), such payment shall be held in trust for the benefit of,
shall be paid over or delivered to, the holders of Guarantor Senior Debt (pro
rata to such holders on the basis of the respective amount of Guarantor Senior
Debt held by such holders) or their respective Representatives, as their
respective interests may appear.  The Trustee shall be entitled to rely on
information regarding amounts then due and owing on the Guarantor Senior Debt,
if any, received from the holders of Guarantor Senior Debt (or their
Representatives) or, if such information is not received from such holders or
their Representatives, from the Subsidiary Guarantor and only amounts included
in the information provided to the Trustee shall be paid to the holders of
Guarantor Senior Debt.

            Nothing contained in this Article XIV shall limit the right of the
Trustee or the Holders of Securities to take any action to accelerate the
maturity of the Securities pursuant to Section 5.2 or to pursue any rights or
remedies hereunder; provided that all Guarantor Senior Debt thereafter due or
declared to be due shall first be paid in full in cash or cash equivalents
before the Holders are entitled to receive any payment of any kind or character
with respect to the obligations on the Securities or on account of the
Subsidiary Guarantor's Guarantee.

SECTION 14.11  Payment Over of Proceeds upon Dissolution, Etc.
               ----------------------------------------------

            (a)    Upon any payment or distribution of assets of the Subsidiary
Guarantor of any kind or character, whether in cash, property or securities, to
creditors upon any liquidation, dissolution, winding-up, reorganization,
assignment for the benefit of creditors or marshalling of assets of the
Subsidiary Guarantor, or in a bankruptcy, reorganization, insolvency,
receivership or similar proceeding relating to the Subsidiary Guarantor or its
property, whether voluntary or involuntary, all obligations with respect to all
Guarantor Senior Debt shall first be paid in full, in cash or cash equivalents,
before any payment or distribution of any kind or character is made on account
of any obligations on the Securities or any of the obligations of the Subsidiary
Guarantor on its Guarantee, or for the acquisition of any of the Securities for
cash
<PAGE>

                                     -116-

or property or otherwise; and until all such obligations with respect to all
Guarantor Senior Debt are paid in full in cash or cash equivalents, any
distribution to which the Holders of the Securities would be entitled but for
the subordination provisions hereof will be made to the holders of Guarantor
Senior Debt as their interests may appear. Upon any such dissolution, winding-
up, liquidation, reorganization, bankruptcy, insolvency, receivership or similar
proceeding or assignment for the benefit of creditors or marshalling of assets,
any payment or distribution of assets of the Subsidiary Guarantor of any kind or
character, whether in cash, property or securities, to which the Holders of the
Securities or the Trustee under this Indenture would be entitled, except for the
provisions hereof, shall be paid by the Subsidiary Guarantor or by any receiver,
trustee in bankruptcy, liquidating trustee, agent or other Person making such
payment or distribution, or by the Holders of the Securities or by the Trustee
under this Indenture if received by it, directly to the holders of Guarantor
Senior Debt (pro rata to such holders on the basis of the respective amounts of
Guarantor Senior Debt held by such holders) or their respective Representatives,
or to the trustee or trustees under any indenture pursuant to which any of such
Guarantor Senior Debt may have been issued, as their respective interests may
appear, for application to the payment of Guarantor Senior Debt remaining unpaid
until all such Guarantor Senior Debt has been paid in full in cash or cash
equivalents after giving effect to any concurrent payment, distribution or
provision therefor to or for the holders of Guarantor Senior Debt.

            (b)    To the extent any payment of Guarantor Senior Debt (whether
by or on behalf of the Subsidiary Guarantor, as proceeds of security or
enforcement of any right of setoff or otherwise) is declared to be fraudulent or
preferential, set aside or required to be paid to any receiver, trustee in
bankruptcy, liquidating trustee, agent or other similar Person under any
bankruptcy, insolvency, receivership, fraudulent conveyance or similar law,
then, if such payment is recovered by, or paid over to, such receiver, trustee
in bankruptcy, liquidating trustee, agent or other similar person, the Guarantor
Senior Debt or part thereof originally intended to be satisfied shall be deemed
to be reinstated and outstanding as if such payment had not occurred.

            (c)    In the event that, notwithstanding the foregoing, any payment
or distribution of assets of the Subsidiary Guarantor of any kind or character,
whether in cash, property or securities, shall be received by any Holder when
such payment or distribution is prohibited by Section 14.11(a), such payment or
distribution shall be held in trust for the benefit of, and shall be paid over
or delivered to, the holders of Guarantor Senior Debt (pro rata to such holders
on the basis of the respective amount of Guarantor Senior Debt held by such
holders) or their respective Representatives, or to the trustee or trustees
under any indenture pursuant to which any of such Guarantor Senior Debt may have
been issued, as their respective interests may appear, for application to the
payment of Guarantor Senior Debt remaining unpaid until all such Guarantor
Senior Debt has been paid in full in cash or cash equivalents, after giving
effect
<PAGE>

                                     -117-

to any concurrent payment, distribution or provision therefor to or for the
holders of such Guarantor Senior Debt.

SECTION 14.12  Payments May Be Paid Prior to Dissolution.
               -----------------------------------------

            Nothing contained in this Article XIV or elsewhere in this Indenture
shall prevent (i) the Subsidiary Guarantor, except under the conditions
described in Sections 14.10 and 14.11, from making payments at any time for the
purpose of making payments of principal of and interest on the Securities, or
from depositing with the Trustee any moneys for such payments, or (ii) in the
absence of actual knowledge by the Trustee that a given payment would be
prohibited by Section 14.10 or 14.11, the application by the Trustee of any
moneys deposited with it for the purpose of making such payments of principal of
and interest on the Securities to the Holders entitled thereto unless at least
one Business Day prior to the date upon which such payment would otherwise
become due and payable, the Trustee shall have received the written notice
provided for in Section 14.10(a) or in Section 14.15 (provided that,
notwithstanding the foregoing, such application shall otherwise be subject to
the provisions of the first sentence of Section 14.10(a) and Section 14.11).
The Subsidiary Guarantor shall give prompt written notice to the Trustee of any
dissolution, winding-up, liquidation or reorganization of the Subsidiary
Guarantor.

SECTION 14.13  Subrogation.
               -----------

            Subject to the payment in full in cash or cash equivalents of all
Guarantor Senior Debt, the Holders of the Securities shall be subrogated to the
rights of the holders of Guarantor Senior Debt to receive payments or
distributions of cash, property or securities of the Subsidiary Guarantor
applicable to the Guarantor Senior Debt of the Subsidiary Guarantor until the
Securities shall be paid in full; and, for the purposes of such subrogation, no
such payments or distributions to the holders of the Guarantor Senior Debt by or
on behalf of the Subsidiary Guarantor or by or on behalf of the Holders by
virtue of this Article XIV which otherwise would have been made to the Holders
shall, as between the Subsidiary Guarantor and the Holders of the Securities, be
deemed to be a payment by the Subsidiary Guarantor to or on account of the
Guarantor Senior Debt, it being understood that the provisions of this Article
XIV are and are intended solely for the purpose of defining the relative rights
of the Holders of the Securities, on the one hand, and the holders of the
Guarantor Senior Debt, on the other hand.

            If any payment or distribution to which the Holders would otherwise
have been entitled but for the provisions of this Article XIV shall have been
applied, pursuant to the provisions of this Article XIV, to the payment of
amounts payable under the Guarantor Senior Debt, then the Holders shall be
entitled to receive from the holders of such Guarantor Senior Debt any payments
or distributions received by such holders of Guarantor Senior Debt in ex-
<PAGE>

                                     -118-

cess of the amount sufficient to pay all amounts payable under or in respect of
the Guarantor Senior Debt in full in cash or cash equivalents.

SECTION 14.14  Obligations of Subsidiary Guarantor Unconditional.
               -------------------------------------------------

            Nothing contained in this Article XIV or elsewhere in this Indenture
or in the Securities or the Guarantee is intended to or shall impair, as to the
Subsidiary Guarantor, its creditors other than the holders of Guarantor Senior
Debt and the Holders of the Securities, the obligation of the Subsidiary
Guarantor, which is absolute and unconditional, to pay to the Holders of the
Securities the principal of and any interest on the Securities as and when the
same shall become due and payable in accordance with the terms of the Guarantee,
or is intended to or shall affect the relative rights of the Holders of the
Securities and creditors of the Subsidiary Guarantor other than the holders of
Guarantor Senior Debt, nor shall anything herein or therein prevent the Holder
of any Security or the Trustee on its behalf from exercising all remedies
otherwise permitted by applicable law upon default under this Indenture, subject
to the rights, if any, in respect of cash, property or securities of the
Subsidiary Guarantor received upon the exercise of any such remedy.

SECTION 14.15  Notice to Trustee.
               -----------------

            The Company or the Subsidiary Guarantor shall give prompt written
notice to the Trustee of any fact known to the Company or any Subsidiary
Guarantor which would prohibit the making of any payment to or by the Trustee in
respect of the Guarantee pursuant to the provisions of this Article XIV.
Regardless of anything to the contrary contained in this Article XIV or
elsewhere in this Indenture, the Trustee  shall not be charged with knowledge of
the existence of any default or event of default with respect to any Guarantor
Senior Debt or of any other facts which would prohibit the making of any payment
to or by the Trustee unless and until the Trustee shall have received notice in
writing from the Company or the Subsidiary Guarantor, or from a holder of
Guarantor Senior Debt or a Representative therefor, and, prior to the receipt of
any such written notice, the Trustee shall be entitled to assume (in the absence
of actual knowledge to the contrary) that no such facts exist.

            In the event that the Trustee determines in good faith that any
evidence is required with respect to the right of any Person as a holder of
Guarantor Senior Debt to participate in any payment or distribution pursuant to
this Article XIV, the Trustee may request such Person to furnish evidence to the
reasonable satisfaction of the Trustee as to the amounts of Guarantor Senior
Debt held by such Person, the extent to which such Person is entitled to
participate in such payment or distribution and any other facts pertinent to the
rights of such Person under this Article XIV, and if such evidence is not
furnished the Trustee may defer any payment to such Person pending judicial
determination as to the right of such Person to receive such payment.
<PAGE>

                                     -119-

SECTION 14.16  Reliance on Judicial Order or Certificate of Liquidating Agent.
               --------------------------------------------------------------

            Upon any payment or distribution of assets of any Subsidiary
Guarantor referred to in this Article XIV, the Trustee, subject to the
provisions of Article VII hereof, and the Holders of the Securities shall be
entitled to rely upon any order or decree made by any court of competent
jurisdiction in which bankruptcy, dissolution, winding-up, liquidation or
reorganization proceedings are pending, or upon certificate of the receiver,
trustee in bankruptcy, liquidating trustee, agent or other Person making such
payment or distribution, delivered to the Trustee or the Holders of the
Securities, for the purpose of ascertaining the Persons entitled to participate
in such distribution, the holders of the Guarantor Senior Debt and other
indebtedness of such Subsidiary Guarantor, the amount thereof or payable
thereon, the amount or amounts paid or distributed thereon and all other facts
pertinent thereto or to this Article XIV.

SECTION 14.17  Trustee's Relation to Guarantor Senior Indebtedness.
               ---------------------------------------------------

            The Trustee and any agent of the Subsidiary Guarantor or the Trustee
shall be entitled to all the rights set forth in this Article XIV with respect
to any Guarantor Senior Debt which may at any time be held by it in its
individual or any other capacity to the same extent as any other holder of
Guarantor Senior Debt and nothing in this Indenture shall deprive the Trustee or
any such agent of any of its rights as such holder.

            With respect to the holders of Guarantor Senior Debt, the Trustee
undertakes to perform or to observe only such of its covenants and obligations
as are specifically set forth in this Article XIV, and no implied covenants or
obligations with respect to the holders of Guarantor Senior Debt shall be read
into this Indenture against the Trustee.  The Trustee shall not be deemed to owe
any fiduciary duty to the holders of Guarantor Senior Debt and shall not be
liable to any such holders if the Trustee shall pay over or distribute to or on
behalf of Holders or the Subsidiary Guarantor or any other Person money or
assets to which any holders of Guarantor Senior Debt shall be entitled by virtue
of this Article, except if such payment is made as a result of willful
misconduct or gross negligence of the Trustee.

            Whenever a distribution is to be made or a notice given to holders
or owners of Guarantor Senior Debt, the distribution may be made and the notice
given to their Representatives, if any.

SECTION 14.18  Subordination Rights Not Impaired by Acts or Omissions of the

              Subsidiary Guarantor or Holders of Guarantor Senior Debt.
              --------------------------------------------------------------

            No right of any present or future holders of any Guarantor Senior
Debt to enforce subordination as provided herein shall at any time in any way be
prejudiced or impaired by any act or failure to act on the part of the
Subsidiary Guarantor or by any act or failure to
<PAGE>

                                     -120-

act, in good faith, by any such holder, or by any noncompliance by the
Subsidiary Guarantor with the terms of this Indenture, regardless of any
knowledge thereof which any such holder may have or otherwise be charged with.

            Without in any way limiting the generality of the foregoing
paragraph, the holders of Guarantor Senior Debt may, at any time and from time
to time, without the consent of or notice to the Trustee, without incurring
responsibility to the Trustee or the Holders of the Securities and without
impairing or releasing the subordination provided in this Article XIV or the
obligations hereunder of the Holders of the Securities to the holders of the
Guarantor Senior Debt, do any one or more of the following: (i) change the
manner, place or terms of payment or extend the time of payment of, or renew or
alter, Guarantor Senior Debt, or otherwise amend or supplement in any manner
Guarantor Senior Debt, or any instrument evidencing the same or any agreement
under which Guarantor Senior Debt is outstanding; (ii) sell, exchange, release
or otherwise deal with any property pledged, mortgaged or otherwise securing
Guarantor Senior Debt; (iii) release any Person liable in any manner for the
payment or collection of Guarantor Senior Debt; and (iv) exercise or refrain
from exercising any rights against the Subsidiary Guarantor and any other
Person.

SECTION 14.19  Noteholders Authorize Trustee to Effectuate Subordination of
               Guarantees.
               ------------------------------------------------------------

            Each Holder of Securities by its acceptance of them authorizes and
expressly directs the Trustee on its behalf to take such action as may be
necessary or appropriate to effectuate, as between the holders of Guarantor
Senior Debt and the Holders of Securities, the subordination provided in this
Article XIV, and appoints the Trustee its attorney-in-fact for such purposes,
including, in the event of any dissolution, winding-up, liquidation or
reorganization of the Subsidiary Guarantor (whether in bankruptcy, insolvency,
receivership, reorganization or similar proceedings or upon an assignment for
the benefit of creditors or otherwise) tending towards liquidation of the
business as assets of the Subsidiary Guarantor, the filing of a claim for the
unpaid balance of its or his Securities and accrued interest in the form
required in those proceedings.

            If the Trustee does not file a proper claim or proof of debt in the
form required in such proceeding prior to 30 days before the expiration of the
time to file such claim or claims, then the holders of the Guarantor Senior Debt
or their Representative are or is hereby authorized to have the right to file
and are or is hereby authorized to file an appropriate claim for and on behalf
of the Holders of said Securities.  Nothing herein contained shall be deemed to
authorize the Trustee or the holders of Guarantor Senior Debt or their
Representative to authorize or consent to or accept or adopt on behalf of any
Holders any plan of reorganization, arrangement, adjustment or composition
affecting the Securities or the rights of any Holder
<PAGE>

                                     -121-

thereof, or to authorize the Trustee or the holders of Guarantor Senior Debt or
their Representative to vote in respect of the claim of any Holder in any such
proceeding.

SECTION 14.20  This Article XIV Not to Prevent Events of Default.
               -------------------------------------------------

          The failure to make a payment on account of principal of or interest
on the Securities by reason of any provision of this Article XIV will not be
construed as preventing the occurrence of an Event of Default.

SECTION 14.21  Trustee's Compensation Not Prejudiced.
               -------------------------------------

          Nothing in this Article XIV will apply to amounts due to the Trustee
pursuant to other sections in this Indenture.

                                  ARTICLE XV

                 REPURCHASE OF SECURITIES AT THE OPTION OF THE
                        HOLDER UPON A CHANGE IN CONTROL

SECTION 15.1   Right to Require Repurchase.
               ---------------------------

          In the event that a Change in Control (as hereinafter defined) shall
occur, then each Holder shall have the right, at the Holder's option, but
subject to the provisions of Section 15.2, to require the Company to repurchase,
and upon the exercise of such right the Company shall repurchase, all of such
Holder's Securities not theretofore called for redemption, or any portion of the
principal amount thereof that is equal to $1,000 or any integral multiple of
$1,000 in excess thereof (provided that no single Security may be repurchased in
part unless the portion of the principal amount of such Security to be
Outstanding after such repurchase is equal to $1,000 or integral multiples of
$1,000 in excess thereof), on the date (the "Repurchase Date") that is 45 days
                                             ---------------
after the date of the Company Notice (as defined in Section 15.3) at a purchase
price equal to 100% of the principal amount of the Securities to be repurchased
plus interest accrued to the Repurchase Date (the "Repurchase Price"); provided,
                                                   ----------------
however, that installments of interest on Securities whose Stated Maturity is on
or prior to the Repurchase Date shall be payable to the Holders of such
Securities, or one or more Predecessor Securities, registered as such on the
relevant Record Date according to their terms and the provisions of Section 3.7.
Such right to require the repurchase of the Securities shall not continue after
a discharge of the Company from its obligations with respect to the Securities
in accordance with Article IV, unless a Change in Control shall have occurred
prior to such discharge.  At the option of the Company, the Repurchase Price may
be paid in cash or, subject to the fulfillment by the Company of the conditions
set forth in Section 15.2, by delivery of shares of Common
<PAGE>

                                     -122-

Stock. Whenever in this Indenture (including Sections 2.2, 3.1, 5.1(1) and 5.8)
there is a reference, in any context, to the principal of any Security as of any
time, such reference shall be deemed to include reference to the Repurchase
Price payable in respect of such Security to the extent that such Repurchase
Price is, was or would be so payable at such time, and express mention of the
Repurchase Price in any provision of this Indenture shall not be construed as
excluding the Repurchase Price in those provisions of this Indenture when such
express mention is not made; provided, however, that for the purposes of Article
XIII such reference shall be deemed to include reference to the Repurchase Price
only to the extent the Repurchase Price is payable in cash.

SECTION 15.2  Conditions to the Company's Election to Pay the Repurchase
              Price in Common Stock
              ----------------------------------------------------------

          The Company may elect to pay the Repurchase Price by delivery of
shares of Common Stock pursuant to Section 15.1 if and only if the following
conditions shall have been satisfied:

          (1)  The shares of Common Stock deliverable in payment of the
     Repurchase Price shall have a fair market value as of the Repurchase Date
     of not less than the Repurchase Price. For purposes of Section 15.1 and
     this Section 15.2, the fair market value of shares of Common Stock shall be
     determined by the Company and shall be equal to 95% of the average of the
     Closing Prices Per Share of the Common Stock for the five consecutive
     Trading Days immediately preceding and including the third Trading Day
     prior to the Repurchase Date;

          (2)  The Repurchase Price shall be paid only in cash in the event any
     shares of Common Stock to be issued upon repurchase of Securities hereunder
     (i) require registration under any federal securities law before such
     shares may be freely transferable without being subject to any transfer
     restrictions under the Securities Act upon repurchase and if such
     registration is not completed or does not become effective prior to the
     Repurchase Date, and/or (ii) require registration with or approval of any
     governmental authority under any state law or any other federal law before
     such shares may be validly issued or delivered upon repurchase and if such
     registration is not completed or does not become effective or such approval
     is not obtained prior to the Repurchase Date;

          (3)  Payment of the Repurchase Price may not be made in Common Stock
     unless such stock is, or shall have been, approved for listing on the New
     York Stock Exchange or listed on a national securities exchange, in either
     case, prior to the Repurchase Date; and
<PAGE>

                                     -123-

          (4)    All shares of Common Stock which may be issued upon repurchase
     of Securities will be issued out of the Company's authorized but unissued
     Common Stock and, will upon issue, be duly and validly issued and fully
     paid and nonassessable and free of any preemptive or similar rights.

          If all of the conditions set forth in this Section 15.2 are not
satisfied in accordance with the terms thereof, the Repurchase Price shall be
paid by the Company only in cash.

SECTION 15.3   Notices; Method of Exercising Repurchase Right, Etc.
               ---------------------------------------------------

          (1)    Unless the Company shall have theretofore called for
redemption, all of the Outstanding Securities, on or before the 30th day after
the occurrence of a Change in Control, the Company or, at the request and
expense of the Company on or before the 30th day after such occurrence, the
Trustee, shall give to all Holders of Securities, in the manner provided in
Section 1.6, notice (the "Company Notice") of the occurrence of the Change of
Control and of the repurchase right set forth herein arising as a result
thereof. The Company shall also deliver a copy of such notice of a repurchase
right to the Trustee.

          Each notice of a repurchase right shall state:

          (i)    the Repurchase Date,

          (ii)   the date by which the repurchase right must be exercised,

          (iii)  the Repurchase Price, and whether the Repurchase Price shall be
     paid by the Company in cash or by delivery of shares of Common Stock,

          (iv)   a description of the procedure which a Holder must follow to
     exercise a repurchase right, and the place or places where such Securities
     are to be surrendered for payment of the Repurchase Price and accrued
     interest (including Liquidated Damages, if any), if any to the Repurchase
     Date,

          (v)    that on the Repurchase Date the Repurchase Price, and accrued
     interest (including liquidated Damages, if any), if any to the Repurchase
     Date, will become due and payable upon each such Security designated by the
     Holder to be repurchased, and that interest thereon shall cease to accrue
     on and after said date,

          (vi)   the Conversion Rate then in effect, the date on which the right
     to convert the principal amount of the Securities to be repurchased will
     terminate and the place or places where such Securities may be surrendered
     for conversion, and

          (vii)  the place or places that the Security certificate with the
     Election of Holder to Require Repurchase as specified in Section 2.2
     shall be delivered, and if the
<PAGE>

                                     -124-

     Security is a Restricted Securities Certificate the place or places that
     the Surrender Certificate required by Section 15.3(9) shall be delivered.

          No failure of the Company to give the foregoing notices or defect
therein shall limit any Holder's right to exercise a repurchase right or affect
the validity of the proceedings for the repurchase of Securities.

          If any of the foregoing provisions or other provisions of this Article
XV are inconsistent with applicable law, such law shall govern.

          (2)  To exercise a repurchase right, a Holder shall deliver to the
Trustee on or before the 30th day after the date of the Company Notice (i)
irrevocable written notice of the Holder's exercise of such right, which notice
shall set forth the name of the Holder, the principal amount of the Securities
to be repurchased (and, if any Security is to be repurchased in part, the serial
number thereof, the portion of the principal amount thereof to be repurchased
and the name of the Person in which the portion thereof to remain Outstanding
after such repurchase is to be registered) and a statement that an election to
exercise the repurchase right is being made thereby, and, in the event that the
Repurchase Price shall be paid in shares of Common Stock, the name or names
(with addresses) in which the certificate or certificates for shares of Common
Stock shall be issued, and (ii) the Securities with respect to which the
repurchase right is being exercised.  Such written notice shall be irrevocable,
except that the right of the Holder to convert the Securities with respect to
which the repurchase right is being exercised shall continue until the close of
business on the Repurchase Date.

          (3)  In the event a repurchase right shall be exercised in accordance
with the terms hereof, the Company shall pay or cause to be paid to the Trustee
the Repurchase Price in cash or shares of Common Stock, as provided above, for
payment to the Holder on the Repurchase Date or, if shares of Common Stock are
to be paid, as promptly after the Repurchase Date as practicable, together with
accrued and unpaid interest to the Repurchase Date payable with respect to the
Securities as to which the repurchase right has been exercised; provided,
however, that installments of interest that mature on or prior to the Repurchase
Date shall be payable in cash to the Holders of such Securities, or one or more
Predecessor Securities, registered as such at the close of business on the
relevant Regular Record Date.

          (4)  If any Security (or portion thereof) surrendered for repurchase
shall not be so paid on the Repurchase Date, the principal amount of such
Security (or portion thereof, as the case may be) shall, until paid, bear
interest to the extent permitted by applicable law from the Repurchase Date at
the rate of 5% per annum, and each Security shall remain convertible into Common
Stock until the principal of such Security (or portion thereof, as the case may
be) shall have been paid or duly provided for.
<PAGE>

                                     -125-

          (5)  Any Security which is to be repurchased only in part shall be
surrendered to the Trustee (with, if the Company or the Trustee so requires, due
endorsement by, or a written instrument of transfer in form satisfactory to the
Company and the Trustee duly executed by, the Holder thereof or his attorney
duly authorized in writing), and the Company shall execute, and the Trustee
shall authenticate and make available for delivery to the Holder of such
Security without service charge, a new Security or Securities, containing
identical terms and conditions, each in an authorized denomination in aggregate
principal amount equal to and in exchange for the unrepurchased portion of the
principal of the Security so surrendered.

          (6)  Any issuance of shares of Common Stock in respect of the
Repurchase Price shall be deemed to have been effected immediately prior to the
close of business on the Repurchase Date and the Person or Persons in whose name
or names any certificate or certificates for shares of Common Stock shall be
issuable upon such repurchase shall be deemed to have become on the Repurchase
Date the holder or holders of record of the shares represented thereby;
provided, however, that any surrender for repurchase on a date when the stock
transfer books of the Company shall be closed shall constitute the Person or
Persons in whose name or names the certificate or certificates for such shares
are to be issued as the record holder or holders thereof for all purposes at the
opening of business on the next succeeding day on which such stock transfer
books are open.  No payment or adjustment shall be made for dividends or
distributions on any Common Stock issued upon repurchase of any Security
declared prior to the Repurchase Date.

          (7)  No fractions of shares shall be issued upon repurchase of
Securities.  If more than one Security shall be repurchased from the same Holder
and the Repurchase Price shall be payable in shares of Common Stock, the number
of full shares which shall be issuable upon such repurchase shall be computed on
the basis of the aggregate principal amount of the Securities so repurchased.
Instead of any fractional share of Common Stock which would otherwise be
issuable on the repurchase of any Security or Securities, the Company will
deliver to the applicable Holder its check for the current market value of such
fractional share.  The current market value of a fraction of a share is
determined by multiplying the current market price of a full share by the
fraction, and rounding the result to the nearest cent.  For purposes of this
Section, the current market price of a share of Common Stock is the Closing
Price Per Share of the Common Stock on the Trading Day immediately preceding the
Repurchase Date.

          (8)  Any issuance and delivery of certificates for shares of Common
Stock on repurchase of Securities shall be made without charge to the Holder of
Securities being repurchased for such certificates or for any tax or duty in
respect of the issuance or delivery of such certificates or the securities
represented thereby; provided, however, that the Company shall not be required
to pay any tax or duty which may be payable in respect of (i) income of the
Holder or (ii) any transfer involved in the issuance or delivery of certificates
for shares of Common Stock in a name other than that of the Holder of the
Securities being repurchased,
<PAGE>

                                     -126-

and no such issuance or delivery shall be made unless and until the Person
requesting such issuance or delivery has paid to the Company the amount of any
such tax or duty or has established, to the satisfaction of the Company, that
such tax or duty has been paid.

          (9)  If shares of Common Stock to be delivered upon repurchase of a
Security are to be registered in a name other than that of the beneficial owner
of such Security, then such Holder must deliver to the Trustee a Surrender
Certificate, dated the date of surrender of such Restricted Security and signed
by such beneficial owner, as to compliance with the restrictions on transfer
applicable to such Restricted Security.  Neither the Trustee nor any Registrar
or Transfer Agent or other agents shall be required to register in a name other
than that of the beneficial owner shares of Common Stock issued upon repurchase
of any such Restricted Security not so accompanied by a properly completed
Surrender Certificate.

          (10) All Securities delivered for repurchase shall be delivered to the
Trustee to be canceled at the direction of the Trustee, which shall dispose of
the same as provided in Section 3.9.

SECTION 15.4  Certain Definitions.
              -------------------

          For purposes of this Article XV,

          (1)  the term "beneficial owner" shall be determined in accordance
     with Rule 13d-3, as in effect on the date of the original execution of this
     Indenture, promulgated by the Commission pursuant to the Exchange Act;

          (2)  a "Change in Control" shall be deemed to have occurred at the
     time, after the original issuance of the Securities, of:

               (i)   the acquisition by any Person (including any syndicate or
          group deemed to be a "person" under Section 13(d)(3) of the Exchange
          Act) of beneficial ownership, directly or indirectly, through a
          purchase, merger or other acquisition transaction or series of
          transactions, of shares of capital stock of the Company entitling such
          person to exercise 50% or more of the total voting power of all shares
          of capital stock of the Company entitled to vote generally in the
          elections of directors, other than any such acquisition by the
          Company, any subsidiary of the Company or any employee benefit plan of
          the Company; or

               (ii)  any consolidation of the Company with, or merger of the
          Company into, any other Person, any merger of another Person into the
          Company, or any conveyance, sale, transfer or lease of all or
          substantially all of the assets of the Company to another Person
          (other than any such transaction (a) which does not result in any
          reclassification, conversion, exchange or cancellation of
<PAGE>

                                     -127-

          outstanding shares of capital stock of the Company, or (b) pursuant to
          which the holders of the Common Stock immediately prior to such
          transaction have the entitlement to exercise, directly or indirectly,
          50% or more of the total voting power of all shares of capital stock
          entitled to vote generally in the election of directors of the
          continuing or surviving corporation immediately after such transaction
          or (c) which is effected solely to change the jurisdiction of
          incorporation of the Company and results in a reclassification,
          conversion or exchange of outstanding shares of Common Stock into
          solely shares of common stock);

     provided, however, that a Change in Control shall not be deemed to have
     occurred if (I) the Closing Price Per Share of the Common Stock for any
     five Trading Days within the period of 10 consecutive Trading Days ending
     immediately after the later of the Change in Control or the public
     announcement of the Change in Control (in the case of a Change in Control
     under clause (i) above) or the period of 10 consecutive Trading Days ending
     immediately before the Change in Control (in the case of a Change in
     Control under clause (ii) above) shall equal or exceed 105% of the
     Conversion Price of the Securities in effect on each such Trading Day or
     (II) all of the consideration (excluding cash payments for fractional
     shares, cash payments made pursuant to dissenters' appraisal rights and
     cash payments for outstanding debt) in a merger or consolidation otherwise
     constituting a Change of Control under clause (i) and/or clause (ii) above
     consists of shares of common stock traded on a national securities exchange
     or listed on the New York Stock Exchange (or will be so traded or listed
     immediately following such merger or consolidation) and as a result of such
     merger or consolidation the Securities become convertible into such common
     stock.

          (3)  the term "Conversion Price" shall equal $1,000 divided by the
     Conversion Rate (rounded to the nearest cent); and

          (4)  for purposes of Section 15.4(2)(i), the term "person" shall
     include any syndicate or group which would be deemed to be a "person" under
     Section 13(d)(3) of the Exchange Act, as in effect on the date of the
     original execution of this Indenture.

SECTION 15.5  Consolidation, Merger, Etc.
              --------------------------

          In the case of any merger, consolidation, conveyance, sale, transfer
or lease of all or substantially all of the assets of the Company to which
Section 12.11 applies, in which the Common Stock of the Company is changed or
exchanged as a result into the right to receive shares of stock and other
securities or property or assets (including cash) which includes shares of
Common Stock of the Company or common stock of another Person that are, or upon
issuance will be, traded on a United States national securities exchange or
approved for trading on an established automated over-the-counter trading market
in the United States and such shares constitute at the time such change or
exchange becomes effective in excess of 50%
<PAGE>

                                     -128-

of the aggregate fair market value of such shares of stock and other securities,
property and assets (including cash) (as determined by the Company, which
determination shall be conclusive and binding), then the Person formed by such
consolidation or resulting from such merger or combination or which acquires the
properties or assets (including cash) of the Company, as the case may be, shall
execute and deliver to the Trustee a supplemental indenture (which shall comply
with the Trust Indenture Act as in force at the date of execution of such
supplemental indenture) modifying the provisions of this Indenture relating to
the right of Holders to cause the Company to repurchase the Securities following
a Change in Control, including without limitation the applicable provisions of
this Article XV and the definitions of the Common Stock and Change in Control,
as appropriate, and such other related definitions set forth herein as
determined in good faith by the Company (which determination shall be conclusive
and binding), to make such provisions apply in the event of a subsequent Change
in Control to the common stock and the issuer thereof if different from the
Company and Common Stock of the Company (in lieu of the Company and the Common
Stock of the Company).

                                  ARTICLE XVI

        HOLDERS LISTS AND REPORTS BY TRUSTEE AND COMPANY; NON-RECOURSE

SECTION 16.1  Company to Furnish Trustee Names and Addresses of Holders.
              ---------------------------------------------------------

          The Company will furnish or cause to be furnished to the Trustee:

          (1)  semi annually, not more than 15 days after the Regular Record
     Date, a list, in such form as the Trustee may reasonably require, of the
     names and addresses of the Holders of Securities as of such Regular Record
     Date, and

          (2)  at such other times as the Trustee may reasonably request in
     writing, within 30 days after the receipt by the Company of any such
     request, a list of similar form and content as of a date not more than 15
     days prior to the time such list is furnished;

provided, however, that no such list need be furnished so long as the Trustee is
acting as Security Registrar.

SECTION 16.2  Preservation of Information.
              ---------------------------

          (1)  The Trustee shall preserve, in as current a form as is reasonably
practicable, the names and addresses of Holders contained in the most recent
list furnished to the Trustee as provided in Section 16.1 and the names and
addresses of Holders received by the
<PAGE>

                                     -129-

Trustee in its capacity as Security Registrar. The Trustee may destroy any list,
if any, furnished to it as provided in Section 16.1 upon receipt of a new list
so furnished.

          (2)  After this Indenture has been qualified under the Trust Indenture
Act, the rights of Holders to communicate with other Holders with respect to
their rights under this Indenture or under the Securities, and the corresponding
rights, and duties of the Trustee, shall be as provided by the Trust Indenture
Act.

          (3)  Every Holder of Securities, by receiving and holding the same,
agrees with the Company and the Trustee that neither the Company nor the Trustee
nor any agent of either of them shall be held accountable by reason of any
disclosure of information as to names and addresses of Holders made pursuant to
the Trust Indenture Act.

SECTION 16.3  Reports by Trustee.
              ------------------

          (1)  After this Indenture has been qualified under the Trust Indenture
Act, the Trustee shall transmit to Holders such reports concerning the Trustee
and its actions under this Indenture as may be required pursuant to the Trust
Indenture Act at the times and in the manner provided pursuant thereto.

          (2)  After this Indenture has been qualified under the Trust Indenture
Act, a copy of each such report shall, at the time of such transmission to
Holders, be filed by the Trustee with each stock exchange upon which the
Securities are listed, with the Commission and with the Company.  The Company
will notify the Trustee when the Securities are listed on any stock exchange.

SECTION 16.4  Reports by Company.
              ------------------

          After this Indenture has been qualified under the Trust Indenture Act,
the Company shall file with the Trustee and the Commission, and transmit to
Holders, such information, documents and other reports, and such summaries
thereof, as maybe required pursuant to the Trust Indenture Act at the times and
in the manner provided pursuant to such Act; provided that any such information,
documents or reports required to be filed with the Commission pursuant to
Section 13 or 15(d) of the Securities Exchange Act of 1934 shall be filed with
the Trustee within 15 days after the same is so required to be filed with the
Commission.
<PAGE>

                                     -130-

                                 ARTICLE XVII

        IMMUNITY OF INCORPORATORS, STOCKHOLDERS, OFFICERS AND DIRECTORS

SECTION 17.1  Indenture and Securities Solely Corporate Obligations.
              -----------------------------------------------------

          No recourse for the payment of the principal of or premium, if any, or
interest on any Security and no recourse under or upon any obligation, covenant
or agreement of the Company in this Indenture or in any supplemental indenture
or in any Security, or because of the creation of any indebtedness represented
thereby, shall be had against any incorporator, stockholder, employee, agent,
officer, or director or subsidiary, as such, past, present or future, of the
Company or of any successor corporation, whether by virtue of any constitution,
statute or rule of law, or by the enforcement of any assessment or penalty or
otherwise; it being expressly understood that all such liability is hereby
waived and released as a condition of, and as a consideration for, the execution
of this Indenture and the issue of the Securities.

          This instrument may be executed in any number of counterparts, each of
which so executed shall be deemed to be an original, but all such counterparts
shall together constitute but one and the same instrument.
<PAGE>

          IN WITNESS WHEREOF, the parties hereto have caused this indenture to
be duly executed, all as of the day and year first above written.

                                             AMERISOURCE HEALTH CORPORATION

                                             By: /s/ W. D. Sprague
                                                -----------------------------
                                                Name: William D. Sprague
                                                Title: Vice President

                                             AMERISOURCE CORPORATION,
                                             as Guarantor

                                             By: /s/ W. D. Sprague
                                                -----------------------------
                                                Name: William D. Sprague
                                                Title: Vice President

                                             BANK ONE TRUST COMPANY, N.A.,
                                             as Trustee

                                             By: /s/ Francis Ballentine
                                                -----------------------------
                                                Name: Francis Ballentine
                                                Title: AVP
<PAGE>

             ANNEX A -- Form of Restricted Securities Certificate

          RESTRICTED SECURITIES CERTIFICATE (For transfers pursuant to Section
3.5(2)(ii) and (iii) of the Indenture)

Bank One Trust Company, N.A.
153 West 51st Street
New York, NY 10019

    Re: 5% CONVERTIBLE SUBORDINATED NOTES DUE DECEMBER 1, 2007
        OF AMERISOURCE HEALTH CORPORATION (THE "SECURITIES")
        ------------------------------------------------------

          Reference is made to the Indenture, dated as of December 12, 2000 (the
"Indenture"), among AmeriSource Health Corporation (the "Company"), AmeriSource
Corporation, as Guarantor, and Bank One Trust Company, N.A., as Trustee.  Terms
used herein and defined in the Indenture or Rule 144 under the U.S. Securities
Act of 1933 (the "Securities Act") are used herein as so defined.

          This certificate relates to $_______ principal amount of Securities,
which are evidenced by the following certificates) (the "Specified Securities"):

        CUSIP No. 03071PAB8

        CERTIFICATE No(s).______________.

          The person in whose name this certificate is executed below (the
"Undersigned") hereby certifies that either (i) it is the sole beneficial owner
of the Specified Securities or (ii) it is acting on behalf of all the beneficial
owners of the Specified Securities and is duly authorized by them to do so.
Such beneficial owner or owners are referred to herein collectively as the
"Owner".  If the Specified Securities are represented by a Global Security, they
are held through the Depositary or an Agent Member in the name of the
Undersigned, as or on behalf of the Owner.  If the Specified Securities are not
represented by a Global Security, they are registered in the name of the
Undersigned, as or on behalf of the Owner.

          The Owner has requested that the Specified Securities be transferred
to a person (the "Transferee") who will take delivery in the form of a
Restricted Security.  In connection with such transfer, the Owner hereby
certifies that, unless such transfer is being effected pursuant to an effective
registration statement under the Securities Act, it is being effected in
accordance with Rule 144A, to a institutional "accredited investor" within the
meaning of Rule 501(A)(1), (2), (3) or (7), or pursuant to another exemption
from registration under the Securities Act (if available) or Rule 144 under the
Securities Act and all applicable securities laws of
<PAGE>

                                      -2-

the states of the United States and other jurisdictions. Accordingly, the Owner
hereby further certifies as:

          (1)  RULE 144A TRANSFERS.  If the transfer is being effected in
     accordance with Rule 144A:

               (A)  the Specified Securities are being transferred to a person
          that the Owner and any person acting on its behalf reasonably believe
          is a "qualified institutional buyer" within the meaning of Rule 144A,
          acquiring for its own account or for the account of a qualified
          institutional buyer; and

               (B)  the Owner and any person acting on its behalf have taken
          reasonable steps to ensure that the Transferee is aware that the Owner
          may be relying on Rule 144A in connection with the transfer.

          (2)  RULE 144 TRANSFERS.  If the transfer is being effected pursuant
     to Rule 144:

               (A)  the transfer is occurring after a holding period of at least
          one year (computed in accordance with paragraph (d) of Rule 144) has
          elapsed since the date the Specified Securities were acquired from the
          Company or from an affiliate (as such term is defined in Rule 144) of
          the Company, whichever is later, and is being effected in accordance
          with the applicable amount, manner of sale and notice requirements of
          paragraphs (e), (f) and (h) of Rule 144; or

               (B)  the transfer is occurring after a period of at least two
          years has elapsed since the date the Specified Securities were
          acquired from the Company or from an affiliate (as such term is
          defined in Rule 144) of the Company, whichever is later, and the Owner
          is not, and during the preceding three months has not been, an
          affiliate of the Company.

          (3)  INSTITUTIONAL ACCREDITED INVESTORS.  If the transfer is to an
     institutional investor that is an accredited investor within the meaning of
     Rule 501(A)(1), (2), (3) or (7) of Regulation D under the Securities Act, a
     signed letter containing certain representations and agreements relating to
     the restrictions on transfer of the Securities and, if such transfer is for
     less than an aggregate principal amount of $250,000, an opinion of counsel
     acceptable to the Company if requested by the Company, that the transfer is
     exempt from registration, must be supplied to the Trustee prior to such
     transfer.

          (4)  TRANSFERS PURSUANT TO OTHER SECURITIES ACT EXEMPTIONS.  If the
     transfer is being effected pursuant to a Securities Act Exemption
<PAGE>

                                      -3-

     other than ones set forth in (1) through (3) above, there shall be
     delivered to the Company an opinion of counsel with respect to such
     holders.

          This certificate and the statements contained herein are made for your
benefit and the benefit of the Company and the Purchasers.

Dated: ________________

          Print the name of the Undersigned, as such term is defined in the
second paragraph of this certificate.)

By: ______________________

Name: ____________________

Title: ___________________

(If the Undersigned is a corporation, partnership or fiduciary, the title of the
person signing on behalf of the Undersigned must be stated.)
<PAGE>

            ANNEX B -- Form of Unrestricted Securities Certificate

                      UNRESTRICTED SECURITIES CERTIFICATE

(For removal of Restricted Securities Legend pursuant to Section 3.5(3))

Bank One Trust Company, N.A.
153 West 51st Street
New York, NY 10019

     Re: 5% CONVERTIBLE SUBORDINATED NOTES DUE DECEMBER 1, 2007
         OF AMERISOURCE HEALTH CORPORATION (THE "SECURITIES")
         ------------------------------------------------------

          Reference is made to the Indenture, dated as of December 12, 2000 (the
"Indenture"), among AmeriSource Health Corporation (the "Company"), AmeriSource
Corporation, as Guarantor, and Bank One Trust Company, N.A., as Trustee.  Terms
used herein and defined in the Indenture or in Rule 144 under the U.S.
Securities Act of 1933 (the "Securities Act") are used herein as so defined.

          This certificate relates to $________ principal amount of Securities,
which are evidenced by the following certificates) (the "Specified Securities"):

          CUSIP No. 03071PAB8

          CERTIFICATE No(s). _______________

          The person in whose name this certificate is executed below (the
"Undersigned") hereby certifies that either (i) it is the sole beneficial owner
of the Specified Securities or (ii) it is acting on behalf of all the beneficial
owners of the Specified Securities and is duly authorized by them to do so.
Such beneficial owner or owners are referred to herein collectively as the
"Owner".  If the Specified Securities are represented by a Global Security, they
are held through the Depositary or an Agent Member in the name of the
Undersigned, as or on behalf of the Owner.  If the Specified Securities are not
represented by a Global Security, they are registered in the name of the
Undersigned, as or on behalf of the Owner.

          The Owner has requested that the Specified Securities be exchanged for
Securities bearing no Restricted Securities Legend pursuant to Section 3.5(3) of
the Indenture.  In connection with such exchange, the Owner hereby certifies
that the exchange is occurring after a period of at least two years has elapsed
since the date the Specified Securities were acquired from the Company or from
an "affiliate" (as such term is defined in Rule 144) of the Company, whichever
is later, and the Owner is not, and during the preceding three months has not
been, an affiliate of the Company.  The Owner also acknowledges that any future
transfers of the
<PAGE>

                                      -2-

Specified Securities must comply with all applicable securities laws of the
states of the United States and other jurisdictions.

          This certificate and the statements contained herein are made for your
benefit and the benefit of the Company and the Initial Purchasers.

Dated: ________________

          Print the name of the Undersigned, as such term is defined in the
second paragraph of this certificate.)

By: ______________________

Name: ____________________

Title: ___________________

(If the Undersigned is a corporation, partnership or fiduciary, the title of the
person signing on behalf of the Undersigned must be stated.)
<PAGE>

                   ANNEX C -- Form of Surrender Certificate

          In connection with the certification contemplated by Section 12.2 or
15.3(9) relating to compliance with certain restrictions relating to transfers
of Restricted Securities, such certification shall be provided substantially in
the form of the following certificate, with only such changes thereto as shall
be approved by the Company and Goldman, Sachs & Co.:

                                  CERTIFICATE

                        AMERISOURCE HEALTH CORPORATION

                   5% CONVERTIBLE NOTES DUE DECEMBER 1, 2007

          This is to certify that as of the date hereof with respect to
$__________ principal amount of the above-captioned securities surrendered on
the date hereof (the "Surrendered Securities") for registration of transfer, or
for conversion or repurchase where the securities issuable upon such conversion
or repurchase are to be registered in a name other than that of the undersigned
Holder (each such transaction being a "transfer"), the undersigned Holder (as
defined in the Indenture) certifies that the transfer of Surrendered Securities
associated with such transfer complies with the restrictive legend set forth on
the face of the Surrendered Securities for the reason checked below:

___________  The transfer of the Surrendered Securities complies with Rule 144A
             under the Securities Act; or

___________  The transfer of the Surrendered Securities complies with Rule 144
             under the United States Securities Act of 1933, as amended (the
             "Securities Act"); or

___________  The transfer of the Surrendered Securities has been made to an
             institution that is an "accredited investor" within the meaning of
             Rule 501(a)(1), (2), (3) or (7) under the Securities Act in a
             transaction exempt from the registration requirements of the
             Securities Act and a signed letter containing certain
             representations and agreements relating to restrictions on transfer
             of the Securities (and if such transfer is for an aggregate
             principal amount less than $250,000, an opinion of counsel
             acceptable to the Company if requested by the Company, that such
             transfer is exempt from registration); or

___________  The transfer of the Surrendered Securities has been made pursuant
             to an exemption from registration under the Securities Act and an
             opinion of counsel has been delivered to the Company with respect
             to such transfer.

 [Name of Holder]
<PAGE>

                                      -2-

Dated: ________________
*To be dated the date of surrender<PAGE>

                                                                    Exhibit 4.17

                        AmeriSource Health Corporation

            5% Convertible Subordinated Notes due December 15, 2007
            -------------------------------------------------------

                             ____________________

                              Purchase Agreement
                              ------------------

                                                                December 6, 2000

Goldman, Sachs & Co.
Banc of America Securities LLC
Credit Suisse First Boston Corporation
First Union Securities, Inc.
J.P. Morgan Securities Inc.
c/o Goldman, Sachs & Co.
85 Broad Street
New York, New York 10004

Ladies and Gentlemen:

     AmeriSource Health Corporation, a Delaware corporation (the "Company"),
                                                                  -------
proposes, subject to the terms and conditions stated herein, to issue and sell
to the Purchasers named in Schedule I hereto (the "Purchasers") an aggregate of
                                                   ----------
$250,000,000 principal amount of the 5% Convertible Subordinated Notes (the
"Notes"), convertible into Class A Common Stock, $.01 par value per share
 -----
("Stock"), of the Company, specified above (the "Firm Securities") and, at the
 ------                                          ---------------
election of the Purchasers, up to an aggregate of $50,000,000 additional
principal amount of Notes (the "Optional Securities").  The Notes will be
                                -------------------
unconditionally guaranteed as to the payment of principal, premium, if any, and
interest (the "Guarantee") by AmeriSource Corporation, a wholly-owned subsidiary
               ---------
of the Company incorporated in the State of Delaware (the "Guarantor").  The
                                                           ---------
Firm Securities, the Optional Securities and the Guarantee are hereinafter
collectively called the "Securities".
                         ----------

     1.   The Company and the Guarantor, jointly and severally, represent and
warrant to, and agree with, each of the Purchasers that:

     (a)  A preliminary offering circular, dated December 4, 2000 (the
"Preliminary Offering Circular"), and an offering circular, dated December 6,
 -----------------------------
2000 (the "Offering Circular"), and the Company's Annual Report on Form 10-K for
           -----------------
the fiscal year ended September 30, 1999 and Quarterly Report on Form 10-Q for
the quarter ended June 30, 2000, which are attached
<PAGE>

                                      -2-

to and made part of the Preliminary Offering Circular and the Offering Circular,
have been prepared in connection with the offering of the Securities and shares
of the Stock issuable upon conversion thereof. Any reference to the Preliminary
Offering Circular or the Offering Circular, as the case may be, as amended or
supplemented, as of any specified date, shall be deemed to include (i) any
documents filed with the United States Securities and Exchange Commission (the
"Commission") pursuant to Section 13(a), 13(c) or 15(d) of the Securities
 ----------
Exchange Act of 1934, as amended (the "Exchange Act"), after the date of the
                                       ------------
Preliminary Offering Circular or the Offering Circular, as the case may be, and
prior to such specified date and (ii) any Additional Issuer Information (as
defined in Section 5(f)) furnished by the Company prior to the completion of the
distribution of the Securities and all documents filed under the Exchange Act
and so deemed to be included in the Preliminary Offering Circular or the
Offering Circular, as the case may be, or any amendment or supplement thereto
are hereinafter called the "Exchange Act Reports". The Exchange Act Reports,
                            --------------------
when they were or are filed with the Commission, conformed or will conform in
all material respects to the applicable requirements of the Exchange Act and the
applicable rules and regulations of the Commission thereunder. The Preliminary
Offering Circular or the Offering Circular and any amendments or supplements
thereto and the Exchange Act Reports did not and will not, as of their
respective dates, contain an untrue statement of a material fact or omit to
state a material fact necessary in order to make the statements therein, in the
light of the circumstances under which they were made, not misleading; provided,
however, that the representation and warranty contained in this paragraph (a)
shall not apply to any statements or omissions made in reliance upon and in
conformity with information furnished in writing to the Company by a Purchaser
through Goldman, Sachs & Co. expressly for use therein;

     (b)  Neither the Company, the Guarantor nor any other subsidiary of the
Company has sustained since the date of the latest audited financial statements
included in the Offering Circular any loss or interference with its business
from fire, explosion, flood or other calamity, whether or not covered by
insurance, or from any labor dispute or court or governmental action, order or
decree, otherwise than as set forth or contemplated in the Offering Circular,
which loss or interference would have a material adverse effect, or would
reasonably be expected to have a prospective material adverse effect, on the
Company and its subsidiaries, taken as a whole; and, since the respective dates
as of which information is given in the Offering Circular, there has not been
any change in the capital stock (other than changes resulting from the exercise
of stock options or the conversions of warrants or capital stock which were
outstanding as of such date and which were executed in the ordinary course of
business) or long-term debt of the Company, the Guarantor or any other
subsidiary of the Company or any material adverse change, or any development
that would be reasonably be expected to result in a material adverse change, in
or affecting the business, management, financial position, stockholders' equity
or results of operations of the Company and its subsidiaries, taken as a whole
(each a "Material Adverse Effect"), otherwise than as set forth or contemplated
         -----------------------
in the Offering Circular;
<PAGE>

                                      -3-

     (c)  The Company and its subsidiaries have good and marketable title in fee
simple to all real property and good and marketable title to all personal
property owned by them and necessary to conduct their business as currently
operated, in each case free and clear of all liens, encumbrances and defects
except such as are described in the Offering Circular or such as do not
materially affect the value of such property and do not interfere materially
with the use made and proposed to be made of such property by the Company and
its subsidiaries; and any real property and buildings held under lease by the
Company and its subsidiaries which are necessary to the conduct of their
business as currently operated are held by them under valid, subsisting and
enforceable leases with such exceptions as are not material and do not interfere
materially with the use made and proposed to be made of such property and
buildings by the Company and its subsidiaries;

     (d)  Each of the Company and the Guarantor has been duly incorporated and
is validly existing as a corporation in good standing under the laws of the
Delaware, with power and authority (corporate and other) to own its properties
and conduct its business as described in the Offering Circular, and has been
duly qualified as a foreign corporation for the transaction of business and is
in good standing under the laws of each other jurisdiction in which it owns or
leases properties or conducts any business so as to require such qualification,
or is subject to no material liability or disability by reason of the failure to
be so qualified in any such jurisdiction; and each other subsidiary of the
Company has been duly incorporated and is validly existing as a corporation in
good standing under the laws of its jurisdiction of incorporation;

     (e)  The Company has an authorized capitalization as set forth in the
Offering Circular, and all of the issued shares of capital stock of the Company
(except as described in the Offering Circular) have been duly and validly
authorized and issued and are fully paid and non-assessable; the shares of Stock
initially issuable upon conversion of the Securities have been duly and validly
authorized and reserved for issuance and, when issued and delivered in
accordance with the provisions of the Securities and the Indenture referred to
below, will be duly and validly issued, fully paid and non-assessable and will
conform to the description of the Stock contained in the Offering Circular; and
all of the issued shares of capital stock of each subsidiary of the Company,
including the Guarantor, have been duly and validly authorized and issued, are
fully paid and non-assessable and (except as described in the Offering Circular)
are owned directly or indirectly by the Company, free and clear of all liens,
encumbrances, equities or claims;

     (f)  The Notes have been duly authorized and, when issued and delivered
pursuant to this Agreement and when authenticated by the Trustee (as defined
below), will have been duly executed, authenticated, issued and delivered and
will constitute valid and legally binding obligations of the Company enforceable
in accordance with their terms (subject, as to enforcement, to bankruptcy,
insolvency, fraudulent conveyance, reorganization and other laws of general
applicability relating to or affecting creditors' rights and to general equity
principles) and
<PAGE>

                                      -4-

entitled to the benefits provided by the indenture to be dated as of December
12, 2000 (the "Indenture") among the Company, the Guarantor and Bank One Trust
               ---------
Company, N.A., as Trustee (the "Trustee"), under which they are to be issued;
                                -------
the Guarantee has been duly authorized and, upon the due authorization, issuance
and delivery of the related Notes and the due endorsement of the Guarantee
thereon, will have been duly executed, authenticated, issued and delivered and
will constitute a valid and legally binding obligation of the Guarantor entitled
to the benefits provided by the Indenture; and the Securities and the Indenture
will conform in all material respects to the descriptions thereof in the
Offering Circular and will be in substantially the form previously delivered to
you;

     (g)  None of the transactions contemplated by this Agreement (including,
without limitation, the use of the proceeds from the sale of the Securities)
will violate or result in a violation of Section 7 of the Exchange Act, or any
regulation promulgated thereunder, including, without limitation, Regulations T,
U and X of the Board of Governors of the Federal Reserve System;

     (h)  Prior to the date hereof, neither the Company nor, to the Company's
knowledge, any of its affiliates has taken any action which is designed to or
which has constituted or which might have been expected to cause or result in
stabilization or manipulation of the price of any security of the Company in
connection with the offering of the Securities;

     (i)  The issue and sale of the Securities and the compliance by the Company
and the Guarantor with all of the provisions of the Securities, the Indenture,
the registration rights agreement, to be dated as of the First Time of Delivery
(as defined in Section 4) (the "Registration Rights Agreement"), and this
                                -----------------------------
Agreement and the consummation of the transactions herein and therein
contemplated will not conflict with or result in a breach or violation of any of
the terms or provisions of, or constitute a default under, any indenture,
mortgage, deed of trust, loan agreement or other agreement or instrument to
which the Company or any of its subsidiaries is a party or by which the Company
or any of its subsidiaries is bound or to which any of the property or assets of
the Company or any of its subsidiaries is subject, nor will such action result
in any violation of the provisions of the Certificate of Incorporation or By-
laws of the Company or the Guarantor or any statute or any order, rule or
regulation of any court or governmental agency or body having jurisdiction over
the Company or any of its subsidiaries or any of their properties, except, in
each case (other than with respect to such Certificate of Incorporation or By-
laws), for such conflicts, violations, breaches or defaults which would not
result in a Material Adverse Effect;

     (j)  No consent, approval, authorization, order, registration or
qualification of or with any such court or governmental agency or body is
required for the issue and sale of the Securities or the consummation by the
Company or the Guarantor of the transactions contemplated by this Agreement, the
Registration Rights Agreement or the Indenture, except (i) as
<PAGE>

                                      -5-

required pursuant to or contemplated by the Registration Rights Agreement, (ii)
for the approval of the Stock issuable upon conversion of the Securities for
listing on The New York Stock Exchange, (iii) such consents, approvals,
authorizations, registrations or qualifications as may be required under state
securities or Blue Sky laws in connection with the purchase and distribution of
the Securities by the Purchasers and (iv) where the failure to obtain the same
would not have a Material Adverse Effect or have a material adverse effect on
the consummation of the transactions contemplated under this Agreement, the
Indenture or the Registration Rights Agreement;

     (k)  Neither the Company, the Guarantor nor any other subsidiary of the
Company is in violation of its Certificate of Incorporation or By-laws or in
default in the performance or observance of any material obligation, covenant or
condition contained in any indenture, mortgage, deed of trust, loan agreement,
lease or other agreement or instrument to which it is a party or by which it or
any of its properties may be bound, except (other than with respect to the
Certificate of Incorporation or By-laws) for any such defaults which would not
have a Material Adverse Effect or have a material adverse effect on the
transactions contemplated under this Agreement, the Indenture or the
Registration Rights Agreement;

     (l)  The statements set forth in the Offering Circular under the caption
"Description of Notes" and "Description of Capital Stock", insofar as they
purport to constitute a summary of the terms of the Securities and the Stock,
and under the caption "Certain United States Federal Income and Estate Tax
Consequences", insofar as they purport to describe the provisions of the laws
referred to therein, fairly summarize such terms and laws in all material
respects;

     (m)  Other than as set forth in the Offering Circular, there are no legal
or governmental proceedings pending to which the Company or any of its
subsidiaries is a party or of which any of their properties is the subject
which, if determined adversely to the Company or any of its subsidiaries, would
individually or in the aggregate have a material adverse effect on the current
or future financial position, stockholders' equity or results of operations of
the Company and its subsidiaries; and, to the best of the Company's knowledge,
no such proceedings are threatened or contemplated by governmental authorities
or threatened by others;

     (n)  When the Securities are issued and delivered pursuant to this
Agreement, the Securities will not be of the same class (within the meaning of
Rule 144A under the Securities Act of 1933, as amended (the "Act")) as
                                                             ---
securities which are listed on a national securities exchange registered under
Section 6 of the Exchange Act or quoted in a U.S. automated inter-dealer
quotation system;

     (o)  The Company is subject to Section 13 or 15(d) of the Exchange Act;

     (p)  Neither the Company nor the Guarantor is, and after giving effect to
the offering and sale of the Securities will not be, an "investment company", as
such term is defined in
<PAGE>

                                      -6-

the United States Investment Company Act of 1940, as amended (the "Investment
                                                                   ----------
Company Act");
------------

     (q)  Neither the Company, the Guarantor nor, to the Company's knowledge,
any of their affiliates has offered or sold the Securities by means of any
general solicitation or general advertising within the meaning of Rule 502(c)
under the Act;

     (r)  Within the preceding six months, neither the Company, the Guarantor
nor any other person acting on their behalf has offered or sold to any person
any Securities, or any securities of the same or a similar class as the
Securities, other than Securities offered or sold to the Purchasers hereunder.
The Company and the Guarantor will take reasonable precautions designed to
insure that any offer or sale, direct or indirect, in the United States or to
any U.S. person (as defined in Rule 902 under the Act) of any Securities or any
substantially similar security issued by the Company and the Guarantor, within
six months subsequent to the date on which the distribution of the Securities
has been completed (as notified to the Company by Goldman, Sachs & Co.), is made
under restrictions and other circumstances reasonably designed not to affect the
status of the offer and sale of the Securities in the United States and to U.S.
persons contemplated by this Agreement as transactions exempt from the
registration provisions of the Securities Act;

     (s)  Assuming the accuracy of the representations made by the Purchasers in
Section 3 hereof, it is not necessary in connection with the offer, sale and
delivery of the Securities to the Purchasers, or in connection with the offer,
sale and initial resale of the Securities by the Purchasers pursuant to Rule
144A under the Act, to register the Securities under the Act or to qualify an
indenture under the Trust Indenture Act of 1939, as amended (the "Trust
                                                                  -----
Indenture Act");
-------------

     (t)  Neither the Company, the Guarantor nor any of their affiliates does
business with the government of Cuba or with any person or affiliate located in
Cuba within the meaning of Section 517.075, Florida Statutes;

     (u)  Ernst & Young LLP, who have certified certain financial statements of
the Company, the Guarantor and the other subsidiaries of the Company, are
independent public accountants as required by the Act and the rules and
regulations of the Commission thereunder;

     (v)  Each of the Company and the Guarantor has all requisite corporate
power to enter into this Agreement, the Registration Rights Agreement and the
Indenture. This Agreement has been, and as of each Time of Delivery, the
Registration Rights Agreement and the Indenture will have been, duly authorized,
executed and delivered by the Company and the Guarantor and upon such execution
by the Company and the Guarantor (assuming the due authorization, execution and
delivery of such agreements by the other parties thereto) this
<PAGE>

                                      -7-

Agreement, the Registration Rights Agreement and the Indenture will constitute
the valid and binding obligations of the Company and the Guarantor enforceable
against the Company and the Guarantor in accordance with the terms hereof or
thereof, subject, as to enforcement, to bankruptcy, insolvency, fraudulent
conveyance, reorganization and other laws of general applicability relating to
or affecting creditors' rights and to general equity principles, and except as
the enforcement of indemnification and contribution provisions hereof and
thereof may be limited by applicable law;

     (w)  No legal or beneficial owner of any securities of the Company has any
rights not effectively satisfied or waived, to require registration of any
shares of capital stock of the Company in connection with any registration of
the Securities or any of the Stock;

     (x)  None of the holders of outstanding shares of capital stock of the
Company and no other person has or will have any preemptive or other rights to
purchase, subscribe for or otherwise acquire (i) the shares of Stock to be
issued upon conversion of the Securities or any rights to such shares (other
than those granted by the holders of the Securities) or (ii) as a result of or
in connection with the transactions contemplated by the Indenture, this
Agreement or the Registration Rights Agreement, any other capital stock of the
Company or rights thereto;

     (y)  Except as disclosed in the Offering Circular, neither the Company nor
the Guarantor is subject to any agreements which restrict the Company's or the
Guarantor's ability to engage in business with or to compete with any entity or
any type of business except for any restrictions which would not be expected to
have a Material Adverse Effect;

     (z)  Except as disclosed in the Offering Circular, each of the Company, the
Guarantor and the other subsidiaries of the Company owns or possesses adequate
licenses or other rights to use, or can acquire on reasonable terms, all
patents, patent licenses, trademarks, trade names, service marks, service names,
copyrights and other intellectual property rights ("Intellectual Property")
                                                    ---------------------
necessary to carry on its business as presently conducted except to the extent
that the failure to own or possess the same could not reasonably be expected to
have a Material Adverse Effect; and, except as described in the Offering
Circular, neither the Company, the Guarantor nor any other subsidiary of the
Company has received any notice of infringement or conflict with asserted rights
of others with respect to the Intellectual Property which, singly or in the
aggregate, if the subject of any unfavorable decision, ruling or finding, could
reasonably be expected to have a Material Adverse Effect; and

     (aa) Each of the Company, the Guarantor and the other subsidiaries of the
Company maintains a system of internal accounting controls sufficient to provide
reasonable assurance that (i) transactions are executed in accordance with
management's general or specific authorizations; (ii) transactions are recorded
as necessary to permit preparation of financial statements in conformity with
generally accepted accounting principles and to maintain asset accountability;
(iii) access to assets is permitted only in accordance with management's general
or specific
<PAGE>

                                      -8-

authorization; and (iv) the recorded accountability for assets is compared with
the existing assets at reasonable intervals and appropriate action is taken with
respect to any differences.

     2.   Subject to the terms and conditions herein set forth, (a) the Company
and the Guarantor agree to issue and sell to each of the Purchasers, and each of
the Purchasers agrees, severally and not jointly, to purchase from the Company,
at a purchase price of 97.125% of the principal amount thereof, the principal
amount of Securities set forth opposite the name of such Purchaser in Schedule I
hereto and (b) in the event and to the extent that the Purchasers shall exercise
the election to purchase Optional Securities as provided below, the Company and
the Guarantor agree to issue and sell to each of the Purchasers, and each of the
Purchasers agrees, severally and not jointly, to purchase from the Company, at
the same purchase price set forth in clause (a) of this Section 2, that portion
of the aggregate principal amount of the Optional Securities as to which such
election shall have been exercised (to be adjusted by you so as to eliminate
fractions), determined by multiplying such aggregate principal amount of
Optional Securities by a fraction, the numerator of which is the maximum
aggregate principal amount of Optional Securities which such Purchaser is
entitled to purchase as set forth opposite the name of such Purchaser in
Schedule I hereto and the denominator of which is the maximum aggregate
principal amount of Optional Securities which all of the Purchasers are entitled
to purchase hereunder.

     The Company and the Guarantor hereby grant to the Purchasers the right to
purchase at their election up to $50,000,000 aggregate principal amount of
Optional Securities, at the purchase price set forth in clause (a) of the first
paragraph of this Section 2, for the sole purpose of covering overallotments in
the sale of Firm Securities.  Any such election to purchase Optional Securities
may be exercised by written notice from you to the Company, given within a
period of 30 calendar days after the date of this Agreement, setting forth the
aggregate principal amount of Optional Securities to be purchased and the date
on which such Optional Securities are to be delivered, as determined by you but
in no event earlier than the First Time of Delivery (as defined in Section 4
hereof) or, unless you, the Company and the Guarantor otherwise agree in
writing, earlier than two or later than ten business days after the date of such
notice.

     3.   Upon the authorization by you of the release of the Securities, the
several Purchasers propose to offer the Securities for sale upon the terms and
conditions set forth in this Agreement and the Offering Circular and each
Purchaser hereby represents and warrants to, and agrees with the Company and the
Guarantor that:

     (a)  It will offer and sell the Securities only to persons who it
reasonably believes are "qualified institutional buyers" ("QIBs") within the
                                                           ----
meaning of Rule 144A under the Act in transactions meeting the requirements of
Rule 144A;
<PAGE>

                                      -9-

     (b)  It is an institutional "accredited investor" within the meaning of
Rule 501 under the Act;

     (c)  It will not offer or sell the Securities by any form of general
solicitation or general advertising, including but not limited to the methods
described in Rule 502(c) under the Act; and

     (d)  Subject to the Company's obligations pursuant to Section 5(c) hereof,
the Purchasers will use commercially reasonable efforts to cause the Offering
Circular to be delivered with the written confirmation of sale to the purchasers
of the Securities.

     4.   (a) The Securities will be represented by one or more definitive
global Securities in book-entry form which will be deposited by or on behalf of
the Company with The Depository Trust Company ("DTC") or its designated
                                                ---
custodian. The Company and the Guarantor will deliver the Securities to the
Purchasers, against payment by the Purchasers of the purchase price therefor by
wire transfer to the Company of Federal (same day) funds, by causing DTC to
credit the Securities to the accounts of the Purchasers at DTC. The Company and
the Guarantor will cause the certificates representing the Securities to be made
available to Goldman, Sachs & Co. for checking at least twenty-four hours prior
to the Time of Delivery (as defined below) at the office of DTC or its
designated custodian (the "Designated Office"). The time and date of such
                           -----------------
delivery and payment shall be, with respect to the Firm Securities, 10:00 a.m.,
New York City time, on December 12, 2000 or such other time and date as Goldman,
Sachs & Co. and the Company may agree upon in writing, and, with respect to the
Optional Securities, 10:00 a.m., New York City time, on the date specified by
Goldman, Sachs & Co. of the Purchasers' election to purchase such Optional
Securities, or such other time and date as Goldman, Sachs & Co. and the Company
may agree upon in writing.  Such time and date for delivery of the Firm
Securities is herein called the "First Time of Delivery", such time and date for
                                 ----------------------
delivery of the Optional Securities, if not the First Time of Delivery, is
herein called the "Second Time of Delivery", and each such time and date for
                   -----------------------
delivery is herein called "Time of Delivery".
                           ----------------

     (b)  The documents to be delivered at the Time of Delivery by or on behalf
of the parties hereto pursuant to Section 7 hereof, including the cross-receipt
for the Securities and any additional documents requested by the Purchasers
pursuant to Section 7(j)hereof, will be delivered at such time and date at the
offices of Cahill Gordon & Reindel, 80 Pine Street, New York, New York, 10005
(the "Closing Location"), and the Securities will be delivered at the Designated
      ----------------
Office, all at the Time of Delivery.  A meeting will be held at the Closing
Location at 12:00 p.m., New York City time, on the New York Business Day next
preceding the Time of Delivery, at which meeting the final drafts of the
documents to be delivered pursuant to the preceding sentence will be available
for review by the parties hereto.  For the purposes of this Section 4, "New York
                                                                        --------
Business Day" shall mean each Monday, Tuesday, Wednesday, Thurs-
------------
<PAGE>

                                      -10-

day and Friday which is not a day on which banking institutions in New York are
generally authorized or obligated by law or executive order to close.

     5.   The Company agrees with each of the Purchasers:

     (a)  To prepare the Offering Circular in a form approved by you; to make no
amendment or any supplement to the Offering Circular which shall be reasonably
disapproved by you promptly after reasonable notice thereof; and to furnish you
with copies thereof;

     (b)  Promptly from time to time to take such action as you may reasonably
request to qualify the Securities and the shares of Stock issuable upon
conversion of the Securities for offering and sale under the securities laws of
such jurisdictions as you may request and to comply with such laws so as to
permit the continuance of sales and dealings therein in such jurisdictions for
as long as may be necessary to complete the distribution of the Securities,
provided that in connection therewith neither the Company nor the Guarantor
shall be required to qualify as a foreign corporation or to file a general
consent to service of process in any jurisdiction;

     (c)  To furnish the Purchasers with as many copies of the Offering Circular
as each may reasonably request and each amendment or supplement thereto and
additional copies thereof in such quantities as you may from time to time
reasonably request, and if, at any time during such period an Offering Circular
is required by law to be delivered in connection with resales of the Securities
by the Purchasers to unaffiliated third parties, there shall have occurred any
event as a result of which the Offering Circular as then amended or supplemented
would include an untrue statement of a material fact or omit to state any
material fact necessary in order to make the statements therein, in the light of
the circumstances under which they were made when such Offering Circular is
delivered, not misleading, or if, it is necessary during such same period to
amend or supplement the Offering Circular to comply with applicable law, to
notify you and upon your request to prepare and furnish without charge to each
Purchaser and to any dealer in securities as many copies as you may from time to
time reasonably request of an amended Offering Circular or a supplement to the
Offering Circular which will correct such statement or omission or effect such
compliance;

     (d)  During the period beginning from the date hereof and continuing until
90 days after the First Time of Delivery, not to offer, sell, contract to sell
or otherwise dispose of, except as provided hereunder, any securities of the
Company that are substantially similar to the Securities or the Stock, including
but not limited to any securities that are convertible into or exchangeable for,
or that represent the right to receive, Stock or any such substantially similar
securities (other than pursuant to stock options or stock option plans existing
on, or upon the conversion or exchange of convertible or exchangeable securities
outstanding as of, the date of this Agreement, or the issuance of securities or
options in connection with a merger or acquisition), without your prior written
consent;
<PAGE>

                                      -11-

     (e)  Not to be or become, at any time prior to the expiration of three
years after the Time of Delivery, an open-end investment company, unit
investment trust, closed-end investment company or face-amount certificate
company that is or is required to be registered under Section 8 of the
Investment Company Act;

     (f)  At any time when the Company is not subject to Section 13 or 15(d) of
the Exchange Act, for the benefit of holders from time to time of Securities, to
furnish at its expense, upon request, to holders of Securities and prospective
purchasers of Securities information (the "Additional Issuer Information")
                                           -----------------------------
satisfying the requirements of subsection (d)(4)(i) of Rule 144A under the Act;

     (g)  If requested by you, to use its best efforts to cause the Securities
to be eligible for the PORTAL trading system of the National Association of
Securities Dealers, Inc.;

     (h)  During a period of five years from the date of the Offering Circular,
to furnish to you copies of all reports or other communications (financial or
other) furnished generally to stockholders of the Company, and to deliver to you
(i) as soon as they are available, copies of any reports and financial
statements furnished to or filed with the Commission or any securities exchange
on which the Securities or any class of securities of the Company is listed; and
(ii) such additional information concerning the business and financial condition
of the Company or the Guarantor as you may from time to time reasonably request
(such financial statements to be on a consolidated basis to the extent the
accounts of the Company and its subsidiaries are consolidated in reports
furnished to its stockholders generally or to the Commission);

     (i)  To use the net proceeds received by them from the sale of the
Securities pursuant to this Agreement in the manner specified in the Offering
Circular under the caption "Use of Proceeds";

     (j)  To reserve and keep available at all times, free of preemptive rights,
shares of Stock for the purpose of enabling the Company to satisfy any
obligations to issue shares of its Stock upon conversion of the Securities; and

     (k)  To use best efforts to list, subject to notice of issuance, the shares
of Stock issuable upon conversion of the Securities on The New York Stock
Exchange.

     6.   The Company covenants and agrees with the several Purchasers that the
Company will pay or cause to be paid the following: (i) the fees, disbursements
and expenses of the Company's counsel and accountants in connection with the
issue of the Securities and the shares of Stock issuable upon conversion of the
Securities and all other expenses in connection with the preparation and
printing of the Preliminary Offering Circular and the Offering Circular and any
amendments and supplements thereto and the mailing and delivering of copies
thereof to the Purchasers and dealers; (ii) the cost of printing or producing
any Agreement among Pur-
<PAGE>

                                      -12-

chasers, this Agreement, the Indenture, the Registration Rights Agreement, the
Blue Sky Survey, closing documents (including any compilations thereof) and any
other documents in connection with the offering, purchase, sale and delivery of
the Securities; (iii) all expenses in connection with the qualification of the
Securities and the shares of Stock issuable upon conversion of the Securities
for offering and sale under state securities laws as provided in Section 5(b)
hereof, including the fees and disbursements of counsel for the Purchasers in
connection with such qualification and in connection with the Blue Sky and legal
investment surveys; (iv) any fees charged by securities rating services for
rating the Securities; (v) the cost of preparing the Securities; (vi) the fees
and expenses of the Trustee and any agent of the Trustee and the fees and
disbursements of counsel for the Trustee in connection with the Indenture and
the Securities; (vii) any cost incurred in connection with the designation of
the Securities for trading in PORTAL and the listing of the shares of Stock
issuable upon conversion of the Securities and (viii) all other costs and
expenses incident to the performance of its obligations hereunder which are not
otherwise specifically provided for in this Section. It is understood, however,
that, except as provided in this Section, and Sections 8 and 11 hereof, the
Purchasers will pay all of their own costs and expenses, including the fees of
their counsel, transfer taxes on resale of any of the Securities by them, and
any advertising expenses connected with any offers they may make.

     7.   The obligations of the Purchasers hereunder shall be subject, in their
discretion, to the condition that all representations and warranties and other
statements of the Company and the Guarantor herein are, at and as of the Time of
Delivery, true and correct, the condition that the Company and the Guarantor
shall have performed all of their respective obligations hereunder theretofore
to be performed, and the following additional conditions:

     (a)  Cahill Gordon & Reindel, counsel for the Purchasers, shall have
furnished to you such opinion or opinions, dated the Time of Delivery, with
respect to such matters as you may reasonably request.  Such counsel shall have
received such papers and information as they may reasonably request to enable
them to pass upon such matters;

     (b)  Dechert, counsel for the Company and the Guarantor, shall have
furnished to you their written opinion, dated the Time of Delivery, in form and
substance satisfactory to you, to the effect that:

          (i)  Each of Company and the Guarantor has been duly incorporated and
     is validly existing as a corporation in good standing under the laws of the
     State of Delaware, with corporate power and corporate authority to own its
     properties and conduct its business as described in the Offering Circular;

          (ii) The Company has an authorized capitalization as set forth in
     the Offering Circular, and all of the issued shares of capital stock of the
     Company and the Guarantor have been duly and validly authorized and issued
     and are fully paid and
<PAGE>

                                      -13-

     non-assessable; and the shares of Stock initially issuable upon conversion
     of the Notes have been duly and validly authorized and reserved for
     issuance and, when issued and delivered in accordance with the provisions
     of the Notes and the Indenture, will be duly and validly issued, fully paid
     and non-assessable, and will conform in all material respects to the
     description of the Stock contained in the Offering Circular;

          (iii)  This Agreement has been duly authorized, executed and delivered
     by the Company and the Guarantor;

          (iv)   The Notes have been duly authorized by the Company and,
     assuming that the Notes have been duly authenticated by the Trustee and
     assuming the Notes have been paid for in accordance with the terms of the
     Agreement, the Notes have been duly executed, issued and delivered by the
     Company and constitute valid and legally binding obligations of the Company
     entitled to the benefits provided by the Indenture;

          (v)    The Guarantee has been duly authorized by the Guarantor and,
     assuming that the Notes and the Guarantee have been duly authenticated by
     the Trustee and assuming the Notes have been paid for in accordance with
     the terms of the Agreement, the Guarantee has been duly executed, issued
     and delivered by the Guarantor and constitutes a valid and legally binding
     obligation of the Guarantor entitled to the benefits provided by the
     Indenture;

          (vi)   The Indenture has been duly authorized, executed and delivered
     by the Company and Guarantor and, assuming due authorization, execution and
     delivery by the Trustee, constitutes a valid and legally binding
     instrument, enforceable against the Company in accordance with its terms,
     subject, as to enforcement, to bankruptcy, insolvency, fraudulent
     conveyance, reorganization and other laws of general applicability relating
     to or affecting creditors' rights and to general equity principles;

          (vii)  The Registration Rights Agreement has been duly authorized,
     executed and delivered by the Company and the Guarantor and, assuming the
     due authorization, execution and delivery by the other parties thereto,
     constitutes a valid and legally binding instrument, enforceable against the
     Company and the Guarantor in accordance with its terms, subject, as to
     enforcement, to bankruptcy, insolvency, fraudulent conveyance,
     reorganization and other laws of general applicability relating to or
     affecting creditors' rights and to general equity principles, and except as
     the enforcement of indemnification and contribution provisions thereof may
     be limited by applicable law;

          (viii) The statements set forth in the Offering Circular under the
     captions "Description of Notes" and "Description of Capital Stock", insofar
     as they purport to constitute a summary of the terms of the Securities and
     the Stock, and under the caption "Certain United States Federal Income and
     Estate Tax Consequences", insofar as
<PAGE>

                                      -14-

     they purport to describe the provisions of the laws referred to therein,
     fairly summarize such terms and laws in all material respects;

          (ix)   The Exchange Act Reports included in the Offering Circular
     (other than any exhibits to such documents, the financial statements
     including the notes thereto and related schedules and other financial data
     contained or incorporated by reference therein, as to which such counsel
     need express no opinion), when they were filed with the Commission,
     complied as to form in all material respects with the requirements of the
     Exchange Act and the rules and regulations of the Commission thereunder;
     and a statement to the effect that although they are not passing upon and
     do not assume any responsibility for the accuracy, completeness or fairness
     of the statements contained in such documents and have not made any
     independent check or verification thereof, on the basis of the foregoing
     (relying as to materiality, to the extent they deem appropriate, upon the
     statements of officers and other representatives of the Company), no facts
     have come to their attention that have caused them to believe that any of
     such documents (other than any exhibits to such documents, the financial
     statements including the notes thereto and related schedules and other
     financial and statistical data contained or incorporated by reference
     therein, as to which such counsel need express no opinion), when such
     documents were so filed, contained an untrue statement of a material fact
     or omitted to state a material fact necessary in order to make the
     statements therein, in the light of the circumstances under which they were
     made when such documents were so filed, not misleading;

          (x)    Assuming that the representations made by the Purchasers in
     Section 3 hereof are accurate, no registration of the Securities under the
     Act, and no qualification of an indenture under the Trust Indenture Act
     with respect thereto, is required for the offer, sale and initial resale of
     the Securities by the Purchasers pursuant to Rule 144A under the Act;

          (xi)   Neither the Company nor the Guarantor is an "investment
     company", as such term is defined in the Investment Company Act;

          (xii)  The Company satisfies the registration requirements of General
     Instructions I.A.3 to Form S-3 for eligibility to register securities on
     Form S-3;

          (xiii) Neither the Company nor the Guarantor is an "investment
     company", as such term is defined in the Investment Company Act;

          (xiv)  A statement to the effect that, although they are not passing
     upon and do not assume any responsibility for the accuracy, completeness or
     fairness of the statements contained in the Offering Circular (except as
     set forth in the last clause of (ii) above), and have not made any
     independent check or verification thereof, on the
<PAGE>

                                      -15-

     basis of the foregoing (relying as to materiality, to the extent they deem
     appropriate, upon the statements of officers and other representatives of
     the Company and the Guarantor), no facts have come to their attention that
     have caused them to believe that, as of its date, the Offering Circular and
     any further amendment or supplement thereto made by the Company and the
     Guarantor prior to the Time of Delivery (other than the financial
     statements including the notes thereto and related schedules and other
     financial data contained or incorporated by reference therein, as to which
     such counsel need express no opinion) contained an untrue statement of a
     material fact or omitted to state a material fact necessary to make the
     statements therein, in the light of the circumstances under which they were
     made, not misleading or that, as of the Time of Delivery, the Offering
     Circular or any further amendment or supplement thereto made by the Company
     and the Guarantor prior to the Time of Delivery (other than the financial
     statements including the notes thereto and related schedules and the other
     financial data contained or incorporated by reference therein, as to which
     such counsel need express no opinion) contains an untrue statement of a
     material fact or omits to state a material fact necessary to make the
     statements therein, in the light of the circumstances under which they were
     made, not misleading.

          In rendering such opinion, such counsel may state that their opinion
     is limited to the laws of the United States of America, the State of New
     York and the General Corporation Law of the State of Delaware, and that
     such counsel expresses no opinion with respect to the effect of any laws or
     regulations relating to the Drug Enforcement Agency, the Food and Drug
     Administration, state boards of pharmacy and departments of health, the
     Pharmaceutical Drug Marketing Act, the Department of Transportation or
     government procurement laws and regulations.  In rendering its statements
     included in (ix) and (xiv) above, such counsel may state that they have
     participated in conferences with officers and other representatives of the
     Company and the Guarantor, representatives of the independent public
     accountants of the Company and representatives of the Purchasers at which
     the contents of the Offering Circular and related matters were discussed;
     and

     (c)  William D. Sprague, Esq., Vice President, General Counsel and
Secretary for the Company, shall have furnished to you his written opinion,
dated the Time of Delivery in form and substance satisfactory to you, to the
effect that:

          (i)  Each of Company and the Guarantor has been duly incorporated and
     is validly existing as a corporation in good standing under the laws of the
     State of Delaware, with corporate power and corporate authority to own its
     properties and conduct its business as described in the Offering Circular;
<PAGE>

                                      -16-

          (ii)  Each of the Company and the Guarantor has been duly qualified as
     a foreign corporation for the transaction of business and is in good
     standing under the laws of each other jurisdiction in which it owns or
     leases properties or conducts any business so as to require such
     qualification, or is subject to no material liability or disability by
     reason of the failure to be so qualified in any such jurisdiction (such
     counsel being entitled to rely in respect of the opinion in this clause
     upon opinions of local counsel and in respect of matters of fact upon
     certificates of officers of the Company or the Guarantor, provided that
     such counsel shall state that he believes that both you and he are
     justified in relying upon such opinions and certificates);

          (iii) Each subsidiary of the Company has been duly incorporated and is
     validly existing as a corporation in good standing under the laws of its
     jurisdiction of incorporation; and all of the issued shares of capital
     stock of each such subsidiary, including the Guarantor, have been duly and
     validly authorized and issued, are fully paid and non-assessable, and are
     owned directly or indirectly by the Company, free and clear of all liens,
     encumbrances, equities or claims (such counsel being entitled to rely in
     respect of the opinion in this clause upon opinions of local counsel and in
     respect of matters of fact upon certificates of officers of the Company or
     the Guarantor, provided that such counsel shall state that he believes that
     both you and he are justified in relying upon such opinions and
     certificates);

          (iv)  To the best of such counsel's knowledge and other than as set
     forth in the Offering Circular, there are no legal or governmental
     proceedings pending to which the Company or any of its subsidiaries is a
     party or of which any property of the Company or any of its subsidiaries is
     the subject which, if determined adversely to the Company or any of its
     subsidiaries, would individually or in the aggregate have a material
     adverse effect on the consolidated financial position, stockholders' equity
     or results of operations of the Company and its subsidiaries taken as a
     whole; and, to the best of such counsel's knowledge, no such proceedings
     are threatened or contemplated by governmental authorities or threatened by
     others;

          (v)   The issue and sale of the Securities and the compliance by the
     Company and the Guarantor with all of the provisions of the Securities, the
     Indenture, the Registration Rights Agreement and this Agreement and the
     consummation of the transactions herein and therein contemplated will not
     conflict with or result in a breach or violation of any of the terms or
     provisions of, or constitute a default under, any indenture, mortgage, deed
     of trust, loan agreement or other agreement or instrument known to such
     counsel to which the Company or any of its subsidiaries is a party or by
     which the Company or any of its subsidiaries is bound or to which any of
     the property or assets of the Company or any of its subsidiaries is
     subject, nor will such actions result in any violation of the provisions of
     the Company's or the Guarantor's Certificate of Incorpo-
<PAGE>

                                      -17-

     ration or By-laws or any statute or any order, rule or regulation of any
     court or governmental agency or body having jurisdiction over the Company
     or any of its subsidiaries or any of their properties, except, in each case
     (other than with respect to such Certificate of Incorporation or By-laws),
     for such conflicts, violations, breaches or defaults which would not result
     in a Material Adverse Effect;

          (vi)   No consent, approval, authorization, order, registration or
     qualification of or with any such court or governmental agency or body is
     required for (A) the issue, sale or delivery of the Securities or the Stock
     issuable upon conversion of the Notes, (B) the resale of the Securities by
     the Purchasers in accordance with the terms of this Agreement and (C) the
     consummation by the Company or the Guarantor of the transactions
     contemplated by this Agreement, the Indenture or the Registration Rights
     Agreement except (i) as required pursuant to or contemplated by the
     Registration Rights Agreement, (ii) the approval of the Stock for
     conversion of the Securities for listing on the New York Stock Exchange
     (iii) such consents, approvals, authorizations, registrations or
     qualifications as may be required under state securities or Blue Sky laws
     in connection with the purchase and distribution of the Securities by the
     Purchasers and (iv) where the failure to obtain such consents would not
     have a Material Adverse Effect or a material adverse effect on the
     transactions contemplated under this Agreement, the Indenture or the
     Registration Rights Agreement;

          (vii)  Neither the Company, the Guarantor nor any other subsidiary of
     the Company is in violation of its Certificate of Incorporation or By-laws
     or in default in the performance or observance of any material obligation,
     covenant or condition contained in any indenture, mortgage, deed of trust,
     loan agreement, lease or other agreement or instrument to which it is a
     party or by which it or any of its properties may be bound which breach or
     default (other than with respect to such Certificate of Incorporation or
     By-laws) would have a Material Adverse Effect;

          (viii) The Exchange Act Reports included in the Offering Circular
     (other than any exhibits to such documents, the financial statements
     including the notes thereto and related schedules and other financial data
     contained or incorporated by reference therein, as to which such counsel
     need express no opinion), when they were filed with the Commission,
     complied as to form in all material respects with the requirements of the
     Exchange Act and the rules and regulations of the Commission thereunder;
     and a statement to the effect that although he is not passing upon and does
     not assume any responsibility for the accuracy, completeness or fairness of
     the statements contained in such documents and has not made any independent
     check or verification thereof, on the basis of the foregoing (relying as to
     materiality, to the extent he deems appropriate, upon the statements of
     officers and other representatives of the Company), no facts have come to
     his attention that have caused him to believe that any of such documents
<PAGE>

                                      -18-

     (other than any exhibits to such documents, the financial statements
     including the notes thereto and related schedules and other financial data
     contained or incorporated by reference therein, as to which such counsel
     need express no opinion), when such documents were so filed, contained an
     untrue statement of a material fact or omitted to state a material fact
     necessary in order to make the statements therein, in the light of the
     circumstances under which they were made when such documents were so filed,
     not misleading;

          (ix) A statement to the effect that, although he is not passing upon
     and does not assume any responsibility for the accuracy, completeness or
     fairness of the statements contained in the Offering Circular, and has not
     made any independent check or verification thereof, on the basis of the
     foregoing (relying as to materiality, to the extent he deems appropriate,
     upon the statements of officers and other representatives of the Company
     and the Guarantor), no facts have come to his attention that have caused
     him to believe that, as of its date, the Offering Circular and any further
     amendment or supplement thereto made by the Company and the Guarantor prior
     to the Time of Delivery (other than the financial statements including the
     notes thereto and related schedules and other financial data contained or
     incorporated by reference therein, as to which such counsel need express no
     opinion) contained an untrue statement of a material fact or omitted to
     state a material fact necessary to make the statements therein, in the
     light of the circumstances under which they were made, not misleading or
     that, as of the Time of Delivery, the Offering Circular or any further
     amendment or supplement thereto made by the Company and the Guarantor prior
     to the Time of Delivery (other than the financial statements including the
     notes thereto and related schedules and the other financial data contained
     or incorporated by reference therein, as to which such counsel need express
     no opinion) contains an untrue statement of a material fact or omits to
     state a material fact necessary to make the statements therein, in the
     light of the circumstances under which they were made, not misleading; and

     (d)  On the date of the Offering Circular prior to the execution of this
Agreement and also at the Time of Delivery, Ernst & Young LLP shall have
furnished to you customary accountants' "comfort" letters, dated the respective
dates of delivery thereof, in form and substance satisfactory to you;

     (e)  (i) Neither the Company nor any of its subsidiaries shall have
sustained since the date of the latest audited financial statements included in
the Offering Circular any loss or interference with its business from fire,
explosion, flood or other calamity, whether or not covered by insurance, or from
any labor dispute or court or governmental action, order or decree, otherwise
than as set forth or contemplated in the Offering Circular, and (ii) since the
respective dates as of which information is given in the Offering Circular there
shall not have been any change in the capital stock or long-term debt of the
Company, the Guarantor or any other
<PAGE>

                                      -19-

subsidiary of the Company or any change, or any development involving a
prospective change, in or affecting the general affairs, management, financial
position, stockholders' equity or results of operations of the Company or any of
its subsidiaries, otherwise than as set forth or contemplated in the Offering
Circular, the effect of which, in any such case described in clause (i) or (ii),
is in the judgment of the Purchasers so material and adverse as to make it
impracticable or inadvisable to proceed with the public offering or the delivery
of the Securities on the terms and in the manner contemplated in this Agreement
and in the Offering Circular;

     (f)  On or after the date hereof (i) no downgrading shall have occurred in
the rating accorded the Company's or the Guarantor's debt securities by any
"nationally recognized statistical rating organization", as that term is defined
by the Commission for purposes of Rule 436(g)(2) under the Act, and (ii) no such
organization shall have publicly announced that it has under surveillance or
review, with possible negative implications, its rating of any of the Company's
or the Guarantor's debt securities;

     (g)  On or after the date hereof there shall not have occurred any of the
following: (i) a suspension or material limitation in trading in securities
generally on the New York Stock Exchange; (ii) a suspension or material
limitation in trading in the Company's securities on the New York Stock
Exchange; (iii) a general moratorium on commercial banking activities declared
by either Federal or New York State authorities; or (iv) the outbreak or
escalation of hostilities involving the United States or the declaration by the
United States of a national emergency or war, if the effect of any such event
specified in this clause (iv) in the judgment of the Purchasers makes it
impracticable or inadvisable to proceed with the offering or the delivery of the
Securities being issued at such Time of Delivery on the terms and in the manner
contemplated in the Offering Circular; or (v) the occurrence of any material
adverse change in the existing, financial, political or economic conditions in
the United States or elsewhere which, in the judgment of the Purchasers, would
materially and adversely affect the financial markets or the markets for the
Securities being issued at such Time of Delivery or the market for the Company's
or the Guarantor's other debt or equity securities;

     (h)  The Securities have been designated for trading on PORTAL;

     (i)  The shares of Stock issuable upon conversion of the Securities shall
have been duly listed, subject to notice of issuance, on the New York Stock
Exchange;

     (j)  The Company and the Guarantor shall have furnished or caused to be
furnished to you at the Time of Delivery certificates of officers of the Company
satisfactory to you as to the accuracy of the representations and warranties of
the Company and the Guarantor herein at and as of such Time of Delivery, as to
the performance by the Company of all of its obligations hereunder to be
performed at or prior to such Time of Delivery, as to the matters set forth in
subsection (e) of this Section and as to such other matters as you may
reasonably request; and
<PAGE>

                                      -20-

     (k)  The Company shall have obtained and delivered to the Purchasers
executed copies of a written agreement of the directors and executive officers
of the Company in the Form of Exhibit A hereto (each such agreement, a "Lock-Up
                                                                        -------
Agreement") by the First Time of Delivery, and executed originals of each Lock-
---------
Up Agreement shall have been delivered to you by such time.

     8.   (a) The Company and the Guarantor, jointly and severally, will
indemnify and hold harmless each Purchaser against any losses, claims, damages
or liabilities, joint or several, to which such Purchaser may become subject,
under the Act or otherwise, insofar as such losses, claims, damages or
liabilities (or actions in respect thereof) arise out of or are based upon an
untrue statement or alleged untrue statement of a material fact contained in any
Preliminary Offering Circular or the Offering Circular, or any amendment or
supplement thereto, or arise out of or are based upon the omission or alleged
omission to state therein a material fact necessary to make the statements
therein not misleading, and will reimburse each Purchaser for any legal or other
expenses reasonably incurred by such Purchaser in connection with investigating
or defending any such action or claim as such expenses are incurred; provided,
however, that neither the Company nor the Guarantor shall be liable in any such
case to the extent that any such loss, claim, damage or liability arises out of
or is based upon an untrue statement or alleged untrue statement or omission or
alleged omission made in any Preliminary Offering Circular or the Offering
Circular or any such amendment or supplement in reliance upon and in conformity
with written information furnished to the Company by any Purchaser through
Goldman, Sachs & Co. expressly for use therein.

     (b)  Each Purchaser will indemnify and hold harmless the Company and the
Guarantor against any losses, claims, damages or liabilities to which the
Company or the Guarantor may become subject, under the Act or otherwise, insofar
as such losses, claims, damages or liabilities (or actions in respect thereof)
arise out of or are based upon an untrue statement or alleged untrue statement
of a material fact contained in any Preliminary Offering Circular or the
Offering Circular, or any amendment or supplement thereto, or arise out of or
are based upon the omission or alleged omission to state therein a material fact
or necessary to make the statements therein not misleading, in each case to the
extent, but only to the extent, that such untrue statement or alleged untrue
statement or omission or alleged omission was made in any Preliminary Offering
Circular or the Offering Circular or any such amendment or supplement in
reliance upon and in conformity with written information furnished to the
Company by such Purchaser through Goldman, Sachs & Co. expressly for use
therein; and will reimburse the Company and the Guarantor for any legal or other
expenses reasonably incurred by the Company and the Guarantor in connection with
investigating or defending any such action or claim as such expenses are
incurred.

     (c)  Promptly after receipt by an indemnified party under subsection (a) or
(b) above of notice of the commencement of any action, such indemnified party
shall, if a claim in respect
<PAGE>

                                      -21-

thereof is to be made against the indemnifying party under such subsection,
notify the indemnifying party in writing of the commencement thereof; but the
omission so to notify the indemnifying party shall not relieve it from any
liability which it may have to any indemnified party otherwise than under such
subsection. In case any such action shall be brought against any indemnified
party and it shall notify the indemnifying party of the commencement thereof,
the indemnifying party shall be entitled to participate therein and, to the
extent that it shall wish, jointly with any other indemnifying party similarly
notified, to assume the defense thereof, with counsel satisfactory to such
indemnified party (who shall not, except with the consent of the indemnified
party, be counsel to the indemnifying party), and, after notice from the
indemnifying party to such indemnified party of its election so to assume the
defense thereof, the indemnifying party shall not be liable to such indemnified
party under such subsection for any legal expenses of other counsel or any other
expenses, in each case subsequently incurred by such indemnified party, in
connection with the defense thereof other than reasonable costs of
investigation. No indemnifying party shall, without the written consent of the
indemnified party, effect the settlement or compromise of, or consent to the
entry of any judgment with respect to, any pending or threatened action or claim
in respect of which indemnification or contribution may be sought hereunder
(whether or not the indemnified party is an actual or potential party to such
action or claim) unless such settlement, compromise or judgment (i) includes an
unconditional release of the indemnified party from all liability arising out of
such action or claim and (ii) does not include a statement as to, or an
admission of, fault, culpability or a failure to act, by or on behalf of any
indemnified party.

     (d)  If the indemnification provided for in this Section 8 is unavailable
to or insufficient to hold harmless an indemnified party under subsection (a) or
(b) above in respect of any losses, claims, damages or liabilities (or actions
in respect thereof) referred to therein, then each indemnifying party shall
contribute to the amount paid or payable by such indemnified party as a result
of such losses, claims, damages or liabilities (or actions in respect thereof)
in such proportion as is appropriate to reflect the relative benefits received
by the Company and the Guarantor on the one hand and the Purchasers on the other
from the offering of the Securities. If, however, the allocation provided by the
immediately preceding sentence is not permitted by applicable law or if the
indemnified party failed to give the notice required under subsection (c) above,
then each indemnifying party shall contribute to such amount paid or payable by
such indemnified party in such proportion as is appropriate to reflect not only
such relative benefits but also the relative fault of the Company and the
Guarantor on the one hand and the Purchasers on the other in connection with the
statements or omissions which resulted in such losses, claims, damages or
liabilities (or actions in respect thereof), as well as any other relevant
equitable considerations. The relative benefits received by the Company and the
Guarantor on the one hand and the Purchasers on the other shall be deemed to be
in the same proportion as the total net proceeds from the offering (before
deducting expenses) received by the Company and the Guarantor bear to the total
underwriting discounts and commissions received by the Purchasers, in each case
as set forth in the Offering Circular. The relative fault
<PAGE>

                                      -22-

shall be determined by reference to, among other things, whether the untrue or
alleged untrue statement of a material fact or the omission or alleged omission
to state a material fact relates to information supplied by the Company and the
Guarantor on the one hand or the Purchasers on the other and the parties'
relative intent, knowledge, access to information and opportunity to correct or
prevent such statement or omission. The Company, the Guarantor and the
Purchasers agree that it would not be just and equitable if contribution
pursuant to this subsection (d) were determined by pro rata allocation (even if
the Purchasers were treated as one entity for such purpose) or by any other
method of allocation which does not take account of the equitable considerations
referred to above in this subsection (d). The amount paid or payable by an
indemnified party as a result of the losses, claims, damages or liabilities (or
actions in respect thereof) referred to above in this subsection (d) shall be
deemed to include any legal or other expenses reasonably incurred by such
indemnified party in connection with investigating or defending any such action
or claim. Notwithstanding the provisions of this subsection (d), no Purchaser
shall be required to contribute any amount in excess of the amount by which the
total price at which the Securities underwritten by it and distributed to
investors were offered to investors exceeds the amount of any damages which such
Purchaser has otherwise been required to pay by reason of such untrue or alleged
untrue statement or omission or alleged omission. No person guilty of fraudulent
misrepresentation (within the meaning of Section 11 of the Act) shall be
entitled to contribution from any person not guilty of such fraudulent
misrepresentation. The Purchasers' obligations in this subsection (d) to
contribute are several in proportion to their respective underwriting
obligations and not joint.

     (e)  The obligations of the Company and the Guarantor under this Section 8
shall be in addition to any liability which the Company or the Guarantor may
otherwise have and shall extend, upon the same terms and conditions, to each
person, if any, who controls any Purchaser within the meaning of the Act; and
the obligations of the Purchasers under this Section 8 shall be in addition to
any liability which the respective Purchasers may otherwise have and shall
extend, upon the same terms and conditions, to each officer and director of the
Company or the Guarantor and to each person, if any, who controls the Company or
the Guarantor within the meaning of the Act.

     9.   (a)  If any Purchaser shall default in its obligation to purchase the
Securities which it has agreed to purchase hereunder, you may in your discretion
arrange for you or another party or other parties to purchase such Securities on
the terms contained herein.  If within thirty-six hours after such default by
any Purchaser you do not arrange for the purchase of such Securities, then the
Company shall be entitled to a further period of thirty-six hours within which
to procure another party or other parties satisfactory to you to purchase such
Securities on such terms.  In the event that, within the respective prescribed
periods, you notify the Company that you have so arranged for the purchase of
such Securities, or the Company notifies you that it has so arranged for the
purchase of such Securities, you or the Company shall have the right to postpone
the Time of Delivery for a period of not more than  seven days,
<PAGE>

                                      -23-

in order to effect whatever changes may thereby be made necessary in the
Offering Circular, or in any other documents or arrangements, and the Company
and the Guarantor agree to prepare promptly any amendments to the Offering
Circular which in your opinion may thereby be made necessary. The term
"Purchaser" as used in this Agreement shall include any person substituted under
this Section with like effect as if such person had originally been a party to
this Agreement with respect to such Securities.

     (b)  If, after giving effect to any arrangements for the purchase of the
Securities of a defaulting Purchaser or Purchasers by you and the Company as
provided in subsection (a) above, the aggregate principal amount of such
Securities which remains unpurchased does not exceed one-eleventh of the
aggregate principal amount of all the Securities to be purchased at such Time of
Delivery, then the Company shall have the right to require each non-defaulting
Purchaser to purchase the principal amount of Securities which such Purchaser
agreed to purchase hereunder and, in addition, to require each non-defaulting
Purchaser to purchase its pro rata share (based on the principal amount of
Securities which such Purchaser agreed to purchase hereunder) of the Securities
of such defaulting Purchaser or Purchasers for which such arrangements have not
been made; but nothing herein shall relieve a defaulting Purchaser from
liability for its default.

     (c)  If, after giving effect to any arrangements for the purchase of the
Securities of a defaulting Purchaser or Purchasers by you and the Company as
provided in subsection (a) above, the aggregate principal amount of Securities
which remains unpurchased exceeds one-eleventh of the aggregate principal amount
of all the Securities, or if the Company shall not exercise the right described
in subsection (b) above to require non-defaulting Purchasers to purchase
Securities of a defaulting Purchaser or Purchasers, then this Agreement (or,
with respect to the Second Time of Delivery, the obligation of the Purchasers to
purchase and of the Company and the Guarantor to sell the Optional Securities)
shall thereupon terminate, without liability on the part of any non-defaulting
Purchaser, the Company or the Guarantor, except for the expenses to be borne by
the Company, the Guarantor and the Purchasers as provided in Section 6 hereof
and the indemnity and contribution agreements in Section 8 hereof; but nothing
herein shall relieve a defaulting Purchaser from liability for its default.

     10.  The respective indemnities, agreements, representations, warranties
and other statements of the Company, the Guarantor and the several Purchasers,
as set forth in this Agreement or made by or on behalf of them, respectively,
pursuant to this Agreement, shall remain in full force and effect, regardless of
any investigation (or any statement as to the results thereof) made by or on
behalf of any Purchaser or any controlling person of any Purchaser, or the
Company, the Guarantor, or any officer or director or controlling person of the
Company or the Guarantor, and shall survive delivery of and payment for the
Securities.
<PAGE>

                                      -24-

     11.  If this Agreement shall be terminated pursuant to Section 9 hereof,
neither the Company nor the Guarantor shall then be under any liability to any
Purchaser except as provided in Sections 6 and 8 hereof; but, if for any other
reason, the Securities are not delivered by or on behalf of the Company and the
Guarantor as provided herein, the Company and the Guarantor will reimburse the
Purchasers through you for all out-of-pocket expenses approved in writing by
you, including fees and disbursements of counsel, reasonably incurred by the
Purchasers in making preparations for the purchase, sale and delivery of the
Securities, but neither the Company nor the Guarantor shall then be under any
further liability to any Purchaser except as provided in Sections 6 and 8
hereof.

     12.  In all dealings hereunder, you shall act on behalf of each of the
Purchasers, and the parties hereto shall be entitled to act and rely upon any
statement, request, notice or agreement on behalf of any Purchaser made or given
by you jointly or by Goldman, Sachs & Co. on behalf of you as the Purchasers.

     All statements, requests, notices and agreements hereunder shall be in
writing, and if to the Purchasers shall be delivered or sent by mail, telex or
facsimile transmission to you as the Purchasers in care of Goldman, Sachs & Co.,
32 Old Slip, 21st Floor, New York, New York 10005, Attention: Registration
Department; if to the Company shall be delivered or sent by mail, telex or
facsimile transmission to the address of the Company set forth in the Offering
Circular, Attention: General Counsel; and if to the Guarantor shall be delivered
or sent by mail, telex or facsimile transmission to the address of the Guarantor
set forth in the Offering Circular, attention:  General Counsel; provided,
however, that any notice to a Purchaser pursuant to Section 8(c) hereof shall be
delivered or sent by mail, telex or facsimile transmission to such Purchaser at
its address set forth in its Purchasers' Questionnaire, or telex constituting
such Questionnaire, which address will be supplied to the Company by you upon
request.  Any such statements, requests, notices or agreements shall take effect
upon receipt thereof.

     13.  This Agreement shall be binding upon, and inure solely to the benefit
of, the Purchasers, the Company, the Guarantor, and, to the extent provided in
Sections 8 and 10 hereof, the officers and directors of the Company or the
Guarantor and each person who controls the Company, the Guarantor or any
Purchaser, and their respective heirs, executors, administrators, successors and
assigns, and no other person shall acquire or have any right under or by virtue
of this Agreement. No purchaser of any of the Securities from any Purchaser
shall be deemed a successor or assign by reason merely of such purchase.

     14.  Time shall be of the essence of this Agreement.

     15.  This Agreement shall be governed by and construed in accordance with
the laws of the State of New York.
<PAGE>

                                      -25-

     16.  This Agreement may be executed by any one or more of the parties
hereto in any number of counterparts, each of which shall be deemed to be an
original, but all such respective counterparts shall together constitute one and
the same instrument.
<PAGE>

                                      -26-

     If the foregoing is in accordance with your understanding, please sign and
return to us counterparts hereof, and upon the acceptance hereof by you, on
behalf of each of the Purchasers, this letter and such acceptance hereof shall
constitute a binding agreement between each of the Purchasers, the Company and
the Guarantor.  It is understood that your acceptance of this letter on behalf
of each of the Purchasers is pursuant to the authority set forth in a form of
Agreement among Purchasers, the form of which shall be submitted to the Company
for examination upon request, but without warranty on your part as to the
authority of the signers thereof.

                                    Very truly yours,

                                    AmeriSource Health Corporation

                                    By: /s/ John A. Aberant
                                        --------------------------------
                                        Name: John A. Aberant
                                        Title: VP Treasurer

                                    AmeriSource Corporation

                                    By: /s/ John A. Aberant
                                        --------------------------------
                                        Name: John A. Aberant
                                        Title:VP Treasurer

Accepted as of the date hereof:

Goldman, Sachs & Co.
Banc of America Securities LLC
Credit Suisse First Boston Corporation
First Union Securities, Inc.
J.P. Morgan Securities Inc.

By: /s/ Goldman, Sachs, & Co.
    --------------------------
       (Goldman, Sachs & Co.)

    On behalf of each of the Purchasers
<PAGE>

                                  SCHEDULE I

<TABLE>
<CAPTION>
                                                                              Principal Amount
                                                                                 of Optional
                                                            Principal         Securities to be
                                                            Amount of           Purchased if
                                                         Firm Securities          Maximum
                                                              to be                Option
                      Purchaser                             Purchased             Exercised
                      ---------                             ---------             ---------
<S>                                                      <C>                  <C>
Goldman, Sachs & Co..................................     $150,000,000
Banc of America Securities LLC.......................       37,500,000
Credit Suisse First Boston Corporation...............       37,500,000
First Union Securities, Inc..........................       12,500,000
J.P. Morgan Securities Inc...........................       12,500,000

     Total...........................................     $250,000,000           $50,000,000
                                                          ============           ===========
</TABLE>
<PAGE>

                                      -2-

                                                                       Exhibit A

                        AmeriSource Health Corporation
                        ------------------------------

                               Lock-Up Agreement
                               -----------------

                               December 6, 2000
                               ----------------

Goldman, Sachs & Co.
c/o Goldman, Sachs & Co.
85 Broad Street
New York, NY 10004

     Re:  AmeriSource Health Corporation- Lock-Up Agreement
          -------------------------------------------------

Ladies and Gentlemen:

     The undersigned understands that you, as representative (the
"Representative"), propose to enter into a Purchase Agreement on behalf of the
 --------------
several Purchasers named in Schedule I to such agreement (collectively, the
"Purchasers"), with AmeriSource Health Corporation, a Delaware corporation (the
 ----------
"Company"), and AmeriSource Corporation, a Delaware Corporation (the
 -------
"Guarantor"), providing for an offering of Convertible Subordinated Notes (the
 ---------
"Notes") of the Company that will be convertible into Class A Common Stock, $.01
 -----
par value per share (the "Common Stock"), of the Company which will be
                          ------------
unconditionally guaranteed (the "Guarantee") as to the payment of principal,
                                 ---------
premium, if any, and interest by the Guarantor (the Notes and the Guarantee are
hereinafter collectively called the "Securities").
                                     ----------

     In consideration of the agreement by the Purchasers to offer and sell the
Notes, and of other good and valuable consideration the receipt and sufficiency
of which is hereby acknowledged, the undersigned agrees that, during the period
beginning from the date of the final Offering Circular covering the offering of
the Securities and continuing to and including the date 90 days after the date
of such final Offering Circular, the undersigned will not offer, sell, contract
to sell, pledge, grant any option to purchase, make any short sale or otherwise
dispose of, or exercise any registration rights with respect to, any shares of
Common Stock of the Company, or any options or warrants to purchase any shares
of Common Stock of the Company, or any securities convertible into, exchangeable
for or that represent the right to receive shares of Common Stock of the Company
(other than options received pursuant to any employee or director stock option
plans existing on the date hereof, provided that such options carry a vesting
period which occurs 90 days or more from the date hereof), whether now owned or
hereinafter acquired, owned directly by the undersigned (including holding as a
custodian) or with
<PAGE>

                                      -3-

respect to which the undersigned has beneficial ownership within the rules and
regulations of the Securities Exchange Commission (the "SEC") (collectively the
                                                        ---
"Undersigned's Shares").
 --------------------

     The foregoing restriction is expressly agreed to preclude the undersigned
from engaging in any hedging or other transaction which is designed to or which
reasonably could be expected to lead to or result in a sale or disposition of
the Undersigned's Shares even if such Shares would be disposed of by someone
other than the undersigned. Such prohibited hedging or other transactions would
include without limitation any short sale or any purchase, sale or grant of any
right (including without limitation any put or call option) with respect to any
of the Undersigned's Shares or with respect to any security that includes,
relates to, or derives any significant part of its value from such shares.

     Notwithstanding the foregoing, the undersigned may transfer the
Undersigned's Shares (i) as a bona fide gift or gifts, provided that the donee
or donees thereof agree to be bound in writing by the restrictions set forth
herein, (ii) to any trust for the direct or indirect benefit of the undersigned
or the immediate family of the undersigned, provided that the trustee of the
trust agrees to be bound in writing by the restrictions set forth herein, and
provided further that any such transfer shall not involve a disposition for
value, or (iii) with the prior written consent of Goldman, Sachs & Co. on behalf
of the Purchasers.  For purposes of this Lock-Up Agreement, "immediate family"
shall mean any relationship by blood, marriage or adoption, not more remote than
first cousin.  In addition, notwithstanding the foregoing, if the undersigned is
a corporation, the corporation may transfer the capital stock of the Company to
any wholly-owned subsidiary of such corporation; provided, however, that in any
                                                 --------  -------
such case, it shall be a condition to the transfer that the transferee execute
an agreement stating that the transferee is receiving and holding such capital
stock subject to the provisions of this Agreement and there shall be no further
transfer of such capital stock except in accordance with this Agreement, and
provided further that any such transfer shall not involve a disposition for
value.  The undersigned now has, and, except as contemplated by clause (i),
(ii), or (iii) above, for the duration of this Lock-Up Agreement will have, good
and marketable title to the Undersigned's Shares, free and clear of all liens,
encumbrances, and claims whatsoever.  The undersigned also agrees and consents
to the entry of stop transfer instructions with the Company's transfer agent and
registrar against the transfer of the Undersigned's Shares except in compliance
with the foregoing restrictions.

     Notwithstanding anything to the contrary, these restrictions shall not
apply to sales in private transactions (i.e., transactions not involving a
public sale, public distribution or other public disposition of shares of
capital stock of the Company, nor any sale pursuant to Rule 144A promulgated
under the Securities Act of 1933, as amended).

     The undersigned understands that the Company, the Guarantor and the
Purchasers are relying upon this Lock-Up Agreement in proceeding toward
consummation of the offering.
<PAGE>

                                      -4-

This Lock-Up Agreement shall automatically terminate upon the undersigned no
longer being either a director or executive officer of the Company. The
undersigned further understands that this Lock-Up Agreement is irrevocable and
shall be binding upon the undersigned's heirs, legal representatives,
successors, and assigns.

                                    Very truly yours,

                                    _________________________________
                                    Exact Name of Shareholder

                                    _________________________________
                                    Authorized Signature

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