Document:

Prepared by R.R. Donnelley Financial -- Amended & Restated Investors' Rights Agreement

 EXHIBIT 10.10 
  
 EXECUTION COPY 
  

  
 AMENDED AND RESTATED 
 INVESTORS’ RIGHTS AGREEMENT 
  
 TERCICA MEDICA, INC. 
  
 Dated as of July 9, 2003 
  

  

 TERCICA MEDICA, INC. 
  
 AMENDED AND RESTATED 
 INVESTORS’ RIGHTS AGREEMENT 
  
 This Amended and Restated Investors’ Rights Agreement (the “Agreement”) is made as of July 9, 2003 by and among Tercica Medica, Inc., a Delaware corporation (the “Company”), the purchasers of the
Company’s Series B Preferred Stock set forth on Exhibit A hereto (the “New Investors”), the holders of the Company’s Series A Preferred Stock set forth on Exhibit B hereto (the “Prior
Investors”), the Series A Warrant holders listed on Exhibit C-1 hereto, the Common Stock Warrant holder listed on Exhibit C-2 hereto, and the Founders listed on Exhibit D hereto. 
  
 RECITALS 
  
 WHEREAS, the Company proposes to sell shares of its Series B Preferred Stock (the “Series B Preferred
Stock”) to the Investors listed on Exhibit A hereto pursuant to that certain Series B Preferred Stock Purchase Agreement (the “Series B Purchase Agreement”) of even date herewith (the “Series B
Financing”); 
  
 WHEREAS, the Company, the Prior
Investors and the Founders are parties to that certain Investors’ Rights Agreement dated May 16, 2002 (the “Prior Rights Agreement”) and the Company and Genentech, Inc. (“Genentech”) are parties to that certain
Genentech Investor Rights Agreement dated July 25, 2002 (the “Genentech Investor Rights Agreement”) providing certain additional rights and privileges to Genentech; 
  
 WHEREAS, the New Investors (Rho Ventures IV, L.P., Rho Ventures IV GmbH & Co. Betiligungs KG, Rho Ventures IV (QP),
L.P., Rho Management Trust I (collectively, the “Rho Entities”), Care Capital Investments II, L.P. (“Care Capital”) and MedImmune Ventures, Inc. (“MedImmune”) excepted) and the Prior Investors are
holders of the Company’s Series A Preferred Stock (the “Series A Preferred Stock” and, together with the Series B Preferred Stock, the “Preferred Stock”) pursuant to that certain Series A Preferred Stock
Purchase Agreement dated May 16, 2002 (the “Series A Purchase Agreement”) in connection with the Company’s Series A financing (the “Series A Financing”); 
  
 WHEREAS, in order to induce the New Investors to purchase shares of the
Company’s Series B Preferred Stock and enter into the Series B Purchase Agreement, the Company and the holders of Series A Preferred Stock, Series A Warrants and Common Stock Warrants desire to grant all New Investors, and maintain with respect
to each other, certain registration, information and other rights set forth herein; and 
  
 WHEREAS, it is a condition to the consummation of the Series B Financing that the parties hereto enter into this Agreement for the purpose of setting forth the rights and privileges of the Investors. 
  
 AGREEMENT 
  
 NOW, THEREFORE, in consideration of the premises and covenants contained in this Agreement and other valid
consideration, the receipt and sufficiency of which are hereby acknowledged, the parties hereto agree as follows: 
  
 A. Amendment of Prior Rights Agreement, Waiver of Right of First Refusal. Effective and contingent upon the execution of this Agreement by the
Company and the holders of a majority-in-interest of the Registrable Securities (as such term is defined in the Prior Rights Agreement) not including the Founder 
  

 Shares (as such term is defined in the Prior Rights Agreement) and the closing of the transactions contemplated by the
Series B Purchase Agreement, the Prior Rights Agreement is hereby amended and restated in its entirety to read as set forth in this Agreement, and the Company, the Founders, the Investors, the Series A Warrant Holders and the Common Stock Warrant
Holders hereby agree to be bound by the provisions hereof as the sole agreement (other than the Genentech Rights Agreement) of such parties with respect to registration rights of the Company’s securities and certain other rights, as set forth
herein. The Prior Investors hereby waive the right of first refusal, including the notice requirements relating thereto, set forth in Section 3 of the Prior Rights Agreement with respect to the issuance of Series B Preferred Stock (and the Common
Stock issuable upon conversion thereof). 
  
 1. Certain
Definitions. As used in this Agreement, the following terms shall have the following respective meanings: 
  
 “Commission” shall mean the Securities and Exchange Commission or any other federal agency at the time administering the Securities Act.

  
 “Common Stock” shall mean the Common Stock of
the Company. 
  
 “Common Stock Warrant” shall
mean the warrant to purchase 585,000 shares of Common Stock issued to Three Crowns Capital as of May 16, 2002. 
  
 “Conversion Stock” shall mean the shares of Common Stock issuable or issued upon conversion of the Shares. 
  
 “Exchange Act” shall mean the Securities Exchange Act of
1934, as amended. 
  
 “Founder” shall mean each
person or entity (and their respective affiliates) listed on Exhibit D hereto. 
  
 “Founder Shares” shall mean all shares of Common Stock of the Company respectively owned by the Founders, whether now owned or acquired in the future. 
  
 “Fully Diluted Basis” shall mean the then outstanding shares
of Common Stock of the Company, including all shares of Common Stock into which outstanding shares of Preferred Stock are then convertible, shares of Common Stock issuable upon exercise of outstanding options, warrants or other convertible
securities, and any Common Stock reserved for future issuance pursuant to plans approved by the Board of Directors. 
  
 “Outstanding Capitalization of the Company” shall mean the then outstanding shares of Common Stock of the Company, including all shares
of Common Stock into which outstanding shares of Preferred Stock are then convertible, and shares of Common Stock issuable upon exercise of outstanding options, warrants or other convertible securities. 
  
 “Genentech Rights of First Refusal” shall mean the specific
rights of first refusal granted to Genentech pursuant to the Genentech Rights Agreement; accordingly, for purposes of Section 3.2 hereof, Genentech shall not be deemed an “Investor” or a “Holder.” 
  
 “Holder” shall mean the holders of Registrable Securities or
securities convertible into Registrable Securities and any person holding such securities to whom the rights under this Agreement have been transferred in accordance with Section 2.13 hereof. 
  

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 “Initiating Holders” shall mean the Holder or Holders of at least fifty percent (50%) of
the Registrable Securities then outstanding; provided, further, that each Founder and any holder of the Common Stock Warrant (including any Warrant Shares issued upon exercise thereof) shall not be deemed a “Holder”, and the
Founder Shares and the Warrant Shares shall not be deemed “Registrable Securities” for purposes of defining those Holders of Registrable Securities that are eligible to request a registration pursuant to Section 2.5(a). 
  
 “Investors” shall mean (i) the New Investors, of which all
except the Rho Entities, Care Capital and MedImmune, are also holders of Series A Preferred Stock pursuant to the Series A Preferred Stock Purchase Agreement dated May 16, 2002 (the “Series A Purchase Agreement”), (ii) the Prior
Investors, (iii) upon exercise of the Series A Warrants, the warrant holders listed on Exhibit C-1 hereto, and (iv) upon exercise of the Common Stock Warrant, the warrant holder listed on Exhibit C-2 hereto, provided that such
warrant holder shall not be deemed an “Investor” or a “Holder” for purposes of Section 3 and Section 4 hereof. 
  
 “Genentech License Agreement” shall mean the License and Collaboration Agreement by and between Genentech and the Company dated April 15,
2002. 
  
 “Preferred Stock” shall mean the
Preferred Stock of the Company. 
  
 “Qualified
IPO” shall have the meaning given to such term in the Company’s Amended and Restated Certificate of Incorporation, as the same may be amended from time to time. 
  
 “Registrable Securities” means (a) the Conversion Stock, (b) any Common Stock of the Company issuable or
issued with respect to, or in exchange for or in replacement of, the Conversion Stock or other securities convertible into or exercisable for Conversion Stock upon any stock split, stock dividend, recapitalization, subdivision or similar event, (c)
the Founder Shares, and (d) the Warrant Shares; provided, however, that (i) for the purposes of Sections 2.5, 2.7, 3 and 4, the Founder Shares and the Warrant Shares shall not be deemed “Registrable Securities” and the
Founders and the holder of the Common Stock Warrant (including any Warrant Shares issued upon exercise thereof) shall not be deemed “Holders”; (ii)(A) the foregoing definition shall exclude in all cases any Registrable Securities sold by a
person in a transaction in which his or her rights under this Agreement are not assigned pursuant to Section 2.13 hereof; and (B) shares of Common Stock or other securities shall only be treated as Registrable Securities if and as long as they have
not been (1) sold to or through a broker or dealer or underwriter in a public distribution or a public securities transaction or (2) sold in a transaction exempt from the registration and prospectus delivery requirements of the Securities Act under
Section 4(1) thereof so that all transfer restrictions, and restrictive legends with respect thereto, if any, are removed upon the consummation of such sale. 
  
 The terms “register,” “registered” and “registration” refer to a registration effected by preparing and
filing a registration statement in compliance with the Securities Act, and the declaration or ordering of the effectiveness of such registration statement. 
  
 “Registration Expenses” shall mean all expenses, except as otherwise stated below, incurred by the Company in complying with Sections
2.5, 2.6 and 2.7 hereof, including, without limitation, all out-of-pocket registration, qualification and filing fees, accounting fees related thereto, printing expenses, escrow fees, fees and disbursements of counsel for the Company and the
reasonable fees and disbursements of one (1) special counsel to the selling Holders. 
  
 “Restated Certificate” shall mean the Company’s Amended and Restated Certificate of Incorporation, as the same may be amended from time to time. 
  

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 “Restricted Securities” shall mean the securities of the Company required to bear the
legend set forth in Section 2.2 hereof. 
  
 “Securities
Act” shall mean the Securities Act of 1933, as amended, or any similar federal statute and the rules and regulations of the Commission thereunder, all as the same shall be in effect at the time. 
  
 “Selling Expenses” shall mean all underwriting discounts,
selling commissions and stock transfer taxes applicable to the securities registered on behalf of the Holders. 
  
 “Series A Shares” shall mean the shares of the Company’s Series A Preferred Stock issued (i) pursuant to the Series A Purchase
Agreement and (ii) upon the exercise of the Series A Warrants. 
  
 “Series A Warrants” shall mean (i) the warrant to purchase 30,000 shares of Series A Preferred Stock issued to T-Bolaget AB dated January 31, 2002, (ii) the warrant to purchase 50,000 shares of Series A Preferred Stock
issued to T-Bolaget AB dated January 31, 2002, (iii) the warrant to purchase 30,000 shares of Series A Preferred Stock issued to Texcel International AB dated January 31, 2002, and (iv) the warrant to purchase 50,000 shares of Series A Preferred
Stock issued to Texcel International AB dated January 31, 2002. 
  
 “Series B Shares” shall mean the shares of the Company’s Series B Preferred Stock issued pursuant to the Series B Purchase Agreement. 
  
 “Shares” shall mean, collectively, the Series A Shares and Series B Shares. 
  
 “Warrant Shares” shall mean the shares of Common Stock
issued upon conversion of the Common Stock Warrant. 
  
 2.
Restrictions on Transferability of Securities; Compliance with Securities Act; Registration Rights. 
  
 2.1 Restrictions on Transferability. The Shares and the Conversion Stock shall not be sold, assigned, transferred or pledged except upon the
conditions specified in this Section 2, which conditions are intended to ensure compliance with the provisions of the Securities Act. Each Investor will cause any proposed purchaser, assignee, transferee, or pledgee of the Shares or the Conversion
Stock held by Investor to agree to take and hold such securities subject to the provisions and upon the conditions specified in this Section 2. 
  
 2.2 Restrictive Legend. Each certificate representing (i) the Shares, (ii) the Conversion Stock or (iii) any other securities issued in respect of
the Shares or the Conversion Stock upon any stock split, stock dividend, recapitalization, merger, consolidation or similar event, shall (unless otherwise permitted by the provisions of Section 2.3 below) be stamped or otherwise imprinted with a
legend in the following form (in addition to any legend required under applicable state or international securities laws): 
  
 THE SHARES REPRESENTED BY THIS CERTIFICATE HAVE NOT BEEN REGISTERED UNDER THE SECURITIES ACT OF 1933, AS AMENDED (THE “SECURITIES ACT”),
AND HAVE BEEN ACQUIRED FOR INVESTMENT AND NOT WITH A VIEW TO, OR IN CONNECTION WITH, THE SALE OR DISTRIBUTION THEREOF. NO SUCH SALE OR DISPOSITION MAY BE EFFECTED WITHOUT AN EFFECTIVE REGISTRATION STATEMENT RELATED THERETO OR AN OPINION OF COUNSEL
IN A FORM SATISFACTORY TO THE COMPANY THAT SUCH REGISTRATION IS NOT REQUIRED UNDER THE SECURITIES ACT. 
  

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 THE SHARES REPRESENTED BY THIS CERTIFICATE ARE SUBJECT TO A MARKET STANDOFF PROVISION WITH THE ISSUER OR
ITS ASSIGNEE(S), AS SET FORTH IN AN AGREEMENT BETWEEN THE COMPANY AND THE ORIGINAL HOLDER OF THESE SHARES. COPIES OF THE AGREEMENT RESTRICTING THE TRANSFER OF THESE SHARES MAY BE OBTAINED AT NO COST BY WRITTEN REQUEST MADE BY THE HOLDER OF RECORD OF
THIS CERTIFICATE TO THE SECRETARY OF THE COMPANY AT THE PRINCIPAL EXECUTIVE OFFICES OF THE COMPANY. 
  
 The Holders consent to the Company making a notation on its records and giving instructions to any transfer agent of the Shares or the Conversion Stock in
order to implement the restrictions on transfer established in this Section 2. 
  
 2.3 Notice of Proposed Transfers. 
  
 (a) The holder of each certificate representing Restricted Securities by acceptance thereof agrees to comply in all respects with the provisions of this Section 2.3. Prior to any proposed sale, assignment, transfer or
pledge of any Restricted Securities (other than (i) a transfer not involving a change in beneficial ownership, or (ii) in transactions involving the distribution without consideration of Restricted Securities by any Holder to any of its partners,
members, grantors to a trust that is an Investor, or other equity owners, or retired partners, retired members or other equity owners, or to the estate of any of its partners, members or other equity owners or retired partners, retired members or
other equity owners, (iii) a transfer to an affiliated fund, partnership or company, which is not a competitor of the Company, subject to compliance with applicable securities laws, or (iv) transfers in compliance with Rule 144(k), as long as the
Company is furnished with satisfactory evidence of compliance with such Rule), unless there is in effect a registration statement under the Securities Act covering the proposed transfer, the holder thereof shall give written notice to the Company of
such holder’s intention to effect such transfer, sale, assignment or pledge. 
  
 (b) Each such notice shall describe the manner and circumstances of the proposed transfer, sale, assignment or pledge in sufficient detail, and shall be accompanied, at such holder’s expense, by either (i) a
written opinion of legal counsel (who shall, and whose legal opinion shall be, reasonably satisfactory to the Company) addressed to the Company, to the effect that the proposed transfer of the Restricted Securities may be effected without
registration under the Securities Act, or (ii) a “no action” letter from the Commission to the effect that the transfer of such securities without registration will not result in a recommendation by the staff of the Commission that action
be taken with respect thereto, whereupon the holder of such Restricted Securities shall be entitled to transfer such Restricted Securities in accordance with the terms of the notice delivered by the holder to the Company. 
  
 (c) Each certificate evidencing the Restricted Securities transferred in
accordance with this Section 2 shall bear the appropriate restrictive legend set forth in Section 2.2 above, except that such certificate shall not bear such restrictive legend if, in the opinion of counsel for such holder and in the reasonable
opinion of the Company’s counsel, such legend is not required in order to establish compliance with any provision of the Securities Act. 
  
 2.4 Removal of Restrictions on Transfer of Securities. Any legend referred to in Section 2.2 hereof stamped on a certificate evidencing the
Restricted Securities and the stock transfer instructions and record notations with respect to such Restricted Securities shall be removed and the Company shall issue a certificate without such legend to the holder of such Restricted Securities if
(i) such securities are registered under the Securities Act, or (ii) such holder provides the Company with an opinion of counsel reasonably acceptable to the Company to the effect that a public sale or transfer of such securities may be made without

  

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 registration under the Securities Act, or (iii) such holder provides the Company with reasonable assurances, which may,
at the option of the Company, include an opinion of counsel satisfactory to the Company, that such securities can be sold pursuant to Section (k) of Rule 144 under the Securities Act. 
  
 2.5 Requested Registration. 
  

(a) Request for Registration. If (x) the Company shall receive at any time after the earlier of (a) four years from the closing date of
the Series A Financing or (b) 180 days after the effective date of the Company’s Qualified IPO, a written request from the Initiating Holders that the Company file a registration statement with respect to the Registrable Securities;
provided: 
  
 (1) in the event the registration statement
requested to be filed is (A) the initial registration statement for a public offering of securities of the Company, the anticipated aggregate offering price of the Registrable Securities requested to be so registered shall be equal to or exceed,
$35,000,000 (prior to the deduction of underwriter discounts or commissions and offering expenses); or (B) subsequent to the Company’s registration statement related to its initial public offering, the anticipated aggregate offering price of
the Registrable Securities requested to be so registered shall be equal to or exceed, $10,000,000 (prior to the deduction of underwriter discounts or commissions and offering expenses); and (2) in each case subject to a minimum offering price to the
public of $3.00 per share (as adjusted for stock splits, stock dividends, reclassifications, subdivisions combinations and the like); 
  
 then (y) the Company will use commercially reasonable efforts to: 
  
 (A) within ten days of the receipt by the Company of such notice, give written notice of the proposed registration
statement to all other Holders; and 
  
 (B) as soon as
practicable thereafter, effect such registration under the Securities Act as may be so requested and as would permit or facilitate the sale and distribution of all or such portion of such Registrable Securities as are specified in such Initiating
Holders’ request, together with all or such portion of the Registrable Securities of any Holder or Holders joining in such request as are specified in written requests received by the Company within twenty (20) days after delivery of such
written notice by the Company. 
  
 Notwithstanding the foregoing,
the Company shall not be obligated to take any action to effect any such registration pursuant to this Section 2.5: 
  
 (1) In any particular jurisdiction in which the Company would be required to qualify as a foreign corporation, subject itself to taxation in that
jurisdiction or execute a general consent to service of process in effecting such registration, unless the Company is already subject to service in such jurisdiction and except as may be required under the Securities Act; 
  
 (2) During the period starting with the date sixty (60) days prior to the
Company’s good faith estimated date of filing of, and ending on the date six (6) months immediately following the effective date of, any registration statement pertaining to securities of the Company (other than a registration statement
relating either to the sale of securities to employees of the Company pursuant to a stock option, stock purchase or similar plan or a Rule 145 transaction), provided that the Company is actively employing in good faith all commercially
reasonable efforts to cause such registration statement to become effective; 
  
 (3) After the Company has filed two (2) such registrations pursuant to this Section 2.5(a), and such registrations have been declared or ordered effective; 
  

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 (4) If the Initiating Holders’ written request proposes to dispose of shares of Registrable
Securities that may be immediately registered on Form S-3 pursuant to a request made pursuant to Section 2.7 below; 
  
 (5) If the Initiating Holders’ written request does not request that such offering be firmly underwritten by a managing underwriter of national
standing; 
  
 (6) If the Initiating Holders are unable to obtain
the commitment of a nationally recognized underwriter to firmly underwrite the offering; or 
  
 (7) If the Company shall furnish to the Initiating Holders requesting a registration statement pursuant to this Section 2.5 a certificate signed by the President of the Company stating that in the good faith judgment
of the Board of Directors it would be seriously detrimental to the Company or its stockholders for a registration statement to be filed and it is therefore essential to defer the filing of such registration statement, then the Company shall have the
right to defer such filing for a period not to exceed 120 days from the date of receipt of the written request from the Initiating Holders; provided, however, that the Company shall not exercise such right more than once in any
twelve-month period of the Company and the Company shall not register any securities for the account of itself or any other stockholders of the Company during such 120 day period (other than a registration relating solely to the sale of securities
of participants in a Company stock plan, a registration relating to a corporate reorganization or transaction under Rule 145 of the Securities Act, a registration on any form that does not include substantially the same information as would be
required to be included in a registration statement covering the sale of the Registrable Securities, or a registration in which the only Common Stock being registered is Common Stock issuable upon conversion of debt securities that are also being
registered). 
  
 (b) Underwriting. In the event that a
registration pursuant to Section 2.5(a) is for a registered public offering involving an underwriting, the Company shall so advise the Holders as part of the notice given pursuant to Section 2.5(a). The right of any Holder to registration pursuant
to Section 2.5(a) shall be conditioned upon such Holder’s participation in the underwriting arrangements required by this Section 2.5(b), and the inclusion of such Holder’s Registrable Securities in the underwriting to the extent requested
shall be limited to the extent provided herein. 
  
 The Company
shall (together with all Holders proposing to distribute their securities through such underwriting) enter into an underwriting agreement in customary form with the managing underwriter. The managing underwriter shall be of recognized national
standing, shall be selected by the Company and shall be reasonably acceptable to the Initiating Holders. Notwithstanding any other provision of this Section 2.5, if the managing underwriter determines that marketing factors require a limitation of
the number of shares to be underwritten, the managing underwriter may limit the Registrable Securities and other securities to be distributed through such underwriting. The Initiating Holders shall so advise the Company and all Holders distributing
their securities through such underwriting of such limitation, and the number of shares of Registrable Securities that may be included in the registration shall be allocated among all Holders requesting to include Registrable Securities in such
registration statement based on the pro rata percentage of Registrable Securities held by such Holders. To facilitate the allocation of shares in accordance with the above provisions, the Company may round the number of shares allocated to any
Holder or Holders to the nearest 100 shares. In no event shall the number of Registrable Securities underwritten in such a registration be limited unless and until all shares held by persons other than the holders of the Registrable Securities are
completely excluded from such offering. 
  
 The limitation on the
number of registrations under this Section 2.5 set forth in Section 2.5(a) shall not apply to any registration in which more than 50% of the Registrable Securities requested by Holders 
  

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 to be included in such registration are excluded pursuant to the preceding paragraph; provided that (i) the
aggregate number of shares of Registrable Securities initially requested by such Holders to be so registered is not greater than that number of shares that represents 20% of the then outstanding capital stock of the Company on a Fully-Diluted Basis,
and (ii) the applicable provisions of Section 2.5(a)(x)(b)(1)-(b)(2) have been satisfied as of the effective date of such registration statement. 
  
 If any Holder of Registrable Securities disapproves of the terms of the underwriting, such Holder may elect to withdraw therefrom by written notice to the
Company, the managing underwriter and the Holders. The Registrable Securities and/or other securities so withdrawn shall also be withdrawn from registration. 
  
 2.6 Company Registration. 
  
 (a) Notice of Registration. If at any time or from time to time the Company shall determine to register any of its securities, either for its own
account or the account of a security holder or holders (other than a registration relating solely to employee benefit plans, a registration relating solely to a Rule 145 transaction, a registration in which the only stock being registered is Common
Stock issuable upon conversion of debt securities that are also being registered, or a registration pursuant to Section 2.5 hereof), the Company shall: 
  
 (i) promptly give to each Holder written notice thereof; and 
  
 (ii) include in such registration, and in any underwriting involved therein, subject to Section 2.6(b) below, all the Registrable Securities specified in
a written request or requests, made within twenty (20) days after delivery of such written notice by the Company, by any Holder. 
  
 (b) Underwriting. If the registration of which the Company gives notice is for a registered public offering involving an underwriting, the Company
shall so advise the Holders as a part of the written notice given pursuant to Section 2.6(a)(i). In such event, the right of any Holder to registration pursuant to Section 2.6 shall be conditioned upon such Holder’s participation in such
underwriting and the inclusion of Registrable Securities in the underwriting to the extent provided herein. 
  
 All Holders proposing to distribute their securities through such underwriting shall (together with the Company) enter into an underwriting agreement in
customary form with the managing underwriter selected for such underwriting by the Company. Notwithstanding any other provision of this Section 2.6, if the managing underwriter determines that marketing factors require a limitation of the number of
shares to be underwritten, the managing underwriter may limit the Registrable Securities and other securities to be distributed through such underwriting; provided that in connection with the Company’s Qualified IPO, the underwriters may
exclude all Registrable Securities from registration. Notwithstanding the foregoing, in no event shall (i) the number of Registrable Securities of the Holders included in the offering be reduced below twenty-five percent (25%) of the total number of
securities included in such offering, (unless such offering is the Company’s Qualified IPO, in which case all Registrable Securities may be excluded) or (ii) any Warrant Shares or securities held by a Founder be included in such offering if any
Registrable Securities held by any Investor (and that such Investor has requested to be registered) are excluded from such offering. The Company shall so advise all Holders distributing their securities through such underwriting of such exclusion or
limitation, and in the case of a limitation, the number of shares of Registrable Securities that may be included in the registration shall be allocated among all Holders requesting to include Registrable Securities in such registration statement
based on the pro rata percentage of Registrable Securities held by such Holders. No Registrable Securities excluded from the underwriting by reason of the underwriter’s marketing limitation shall be included in such registration. To facilitate
the allocation of shares in accordance with the above provisions, the Company may round the number of shares allocated to any Holder or Holders to the nearest 
  

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 100 shares. In no event shall the number of Registrable Securities underwritten in such an offering be limited unless and
until all other shares held by persons other than the holders of Registrable Securities are completely excluded from such offering. 
  
 For purposes of the preceding paragraph as it relates to apportionment, for any Holder of Registrable Securities that has requested to include its
Registrable Securities in an underwritten offering and that is a venture capital fund, partnership or corporation, the affiliated venture capital funds, partners, retired partners and stockholders of such Holder, or the estates and family members of
any such partners and retired partners and any trusts for the benefit of any of the foregoing persons shall be deemed to be a single “Holder,” and any pro rata reduction with respect to such Holder shall be based upon the aggregate amount
of Registrable Securities owned by all such related entities and individuals; provided that all such affiliated entities shall have a single attorney-in-fact for the purpose of exercising any rights, receiving notices or taking any action
hereunder. 
  
 If any Holder or Holders disapprove of the terms of
any such underwriting, such Holder or Holders may elect to withdraw therefrom by written notice to the Company and the managing underwriter. Any securities excluded or withdrawn from such underwriting shall be withdrawn from such registration.

  
 (c) Right to Terminate Registration. The Company shall
have the right to terminate or withdraw any registration initiated by it under this Section 2.6 prior to the effectiveness of such registration whether or not any Holder has elected to include securities in such registration. The Registration
Expenses of such withdrawn registration shall be borne by the Company. 
  
 2.7 Registration on Form S-3. 
  
 (a) If any
Holder or Holders request in writing that the Company file a registration statement on Form S-3 (or any successor form to Form S-3) for a public offering of Registrable Securities, the reasonably anticipated aggregate price to the public of which
would exceed $1,000,000, and the Company is a registrant entitled to use Form S-3 to register the Registrable Securities for such an offering, the Company shall: 
 (i) promptly give to each Holder written notice hereof; and 
  
 (ii) use commercially reasonable efforts to cause such Registrable Securities to be so registered; provided, however, that the Company shall not be required to effect a Form S-3 registration within 180
days of the effective date of a prior registration statement under the Securities Act and shall not be required to effect more than two (2) such registrations in any twelve (12) month period. 
  
 (b) Notwithstanding the foregoing, the Company shall not be obligated to
take any action pursuant to this Section 2.7: 
  
 (i) in any
particular jurisdiction in which the Company would be required to qualify as a foreign corporation, subject itself to taxation in that jurisdiction or execute a general consent to service of process in effecting such registration unless the Company
is already subject to service in such jurisdiction and except as may be required by the Securities Act; 
  
 (ii) if the Company, within ten (10) days of the receipt of the request of the initial Holders, gives notice of its bona fide intention to effect the
filing of a registration statement with the Commission within sixty (60) days of receipt of such request (other than with respect to a registration statement relating either to the sale of securities to employees of the Company pursuant to a stock
option, stock purchase or similar plan or a Rule 145 transaction) (which period shall extend to the date that is six (6) 
  

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 months immediately following the effective date of any such registration statement), provided that the Company is
actively employing in good faith all commercially reasonable efforts to cause such registration statement to become effective; or 
  
 (iii) if the Company shall furnish to such Holders a certificate signed by the President of the Company stating that in the good faith judgment of the
Board of Directors it would be seriously detrimental to the Company or its stockholders for a registration statement to be filed and is therefore essential to defer the filing of such registration statement, then the Company shall have a right to
defer such filing for a period not to exceed 120 days from the receipt of the written request to file such registration by such Holders; provided, however, that the Company shall not exercise such right more than once in any
twelve-month period and provided further that the Company shall not register any securities for the account of itself or any other stockholder of the Company during such 120 day period (other than a registration relating solely to the
sale of securities of participants in a Company stock plan, a registration relating to a corporate reorganization or transaction under Rule 145 of the Securities Act, a registration on any form that does not include substantially the same
information as would be required to be included in a registration statement covering the sale of the Registrable Securities, or a registration in which the only Common Stock being registered is Common Stock issuable upon conversion of debt
securities that are also being registered). 
  
 (c) If the
Initiating Holders intend to distribute the Registrable Securities covered by their request by means of an underwriting, they shall so advise the Company as a part of their request made pursuant to this Section 2.7 and the Company shall include such
information in the written notice referred to in Section 2.7(a). The provisions of Section 2.5(b) shall be applicable to such request (with the substitution of Section 2.7 for references to Section 2.5) 
  
 2.8 Expenses of Registration. All Registration Expenses incurred in
connection with registrations pursuant to Sections 2.5, 2.6 and 2.7 shall be borne by the Company; provided, however, that the Company shall not be required to pay for any expenses of any registration proceeding begun pursuant to
Sections 2.5 and 2.7 if the registration request is subsequently withdrawn at the request of the Holders of a majority of the Registrable Securities to be registered or because a sufficient number of Holders shall have withdrawn so that the minimum
offering conditions set forth in Sections 2.5 and 2.7 are no longer satisfied (in which case all participating Holders shall bear such expenses), unless the Holders of a majority of the Registrable Securities agree to forfeit their right to a demand
registration pursuant to Section 2.5; provided, however, that if at the time of such withdrawal, the Holders have learned of a material adverse change in the condition, business, or prospects of the Company from that known to the
Holders at the time of their request for registration and have withdrawn the request with reasonable promptness following disclosure by the Company of such material adverse change, then the Holders shall not be required to pay any of such expenses
and shall retain their rights pursuant to Sections 2.5 or 2.7. All Selling Expenses relating to securities registered on behalf of the Holders shall be borne by the holders of securities included in such registration pro rata among each other on the
basis of the number of shares so registered. 
  
 2.9
Registration Procedures. In the case of each registration effected by the Company pursuant to this Section 2, the Company will keep each Holder advised in writing as to the initiation of each registration and as to the completion thereof. At
its expense the Company will: 
  
 (a) Prepare and file with the
Commission a registration statement with respect to the Registrable Securities and use its commercially reasonable efforts to cause such registration statement to become effective, and keep such registration statement effective for a period of up to
ninety (90) days or, if earlier, until the distribution contemplated in such registration statement has been completed; 
  

 -10- 

 (b) Prepare and file with the Commission such amendments and supplements to such registration statement
and the prospectus used in connection with such registration statement as may be necessary to comply with the provisions of the Securities Act with respect to the disposition of all securities covered by such registration statement. 
  
 (c) Furnish to the Holders participating in such registration and to the
underwriters of the securities being registered such number of copies of the registration statement, preliminary prospectus, final prospectus and such other documents as such Holders and underwriters may reasonably request in order to facilitate the
public offering of such securities. 
  
 (d) Use its commercially
reasonable efforts to register and qualify the securities covered by such registration statement under such other securities laws of such jurisdictions as shall be reasonably requested by the Holders, provided that the Company shall not be required
in connection therewith or as a condition thereto to qualify to do business or to file a general consent to service of process in any such states or jurisdictions. 
  
 (e) In the event of any underwritten public offering, enter into and perform its obligations under an underwriting
agreement, in usual and customary form, with the managing underwriter(s) of such offering. Each Holder participating in such underwriting shall also enter into and perform its obligations under such an agreement. 
  
 (f) Notify each Holder of Registrable Securities covered by such
registration statement at any time when a prospectus relating thereto is required to be delivered under the Securities Act of the happening of any event as a result of which the prospectus included in such registration statement, as then in effect,
includes an untrue statement of a material fact or omits to state a material fact required to be stated therein or necessary to make the statements therein not misleading in the light of the circumstances then existing. 
  
 (g) In the event of any underwritten public offering, cooperate with the
selling Holders, the underwriters participating in the offering and their counsel in any due diligence investigation reasonably requested by the selling Holders or the underwriters in connection therewith, and participate, to the extent reasonably
requested by the managing underwriter for the offering or the selling Holder, in efforts to sell the Registrable Securities under the offering (including, without limitation, participating in “roadshow” meetings with prospective investors)
that would be customary for underwritten primary offerings of a comparable amount of equity securities by the Company. 
  
 (h) Cause all such Registrable Securities registered pursuant hereunder to be listed on a national exchange or trading system and on each securities
exchange and/or trading system on which similar securities issued by the Company are then listed. 
  
 (i) Provide a transfer agent and registrar for all Registrable Securities registered pursuant hereunder and a CUSIP number for all such Registrable
Securities, in each case not later than the effective date of such registration. 
  
 2.10 Indemnification. 
  
 (a) The Company will indemnify each Holder, each of its officers, directors. members, managers, grantors to a trust that is an Investor, advisors and partners, and each person controlling such Holder within the meaning of Section 15 of the
Securities Act, with respect to which registration has been effected pursuant to this Section 2, and each underwriter, if any, and each person who controls any underwriter within the meaning of Section 15 of the Securities Act, against all expenses,
claims, losses, 
  

 -11- 

 damages or liabilities (or actions in respect thereof), joint or several, including any of the foregoing incurred in
settlement of any litigation, commenced or threatened, arising out of or based on any untrue statement (or alleged untrue statement) of a material fact contained in any registration statement, prospectus, offering circular or other document, or any
amendment or supplement thereto, incident to any such registration, qualification or compliance, or based on any omission (or alleged omission) to state therein a material fact required to be stated therein or necessary to make the statements
therein, in light of the circumstances in which they were made, not misleading, or any violation or alleged violation by the Company of the Securities Act, the Exchange Act or any state securities laws or any rule or regulation promulgated under the
Securities Act, the Exchange Act or any state securities laws applicable to the Company in connection with any such registration and the Company will reimburse each such Holder, each of its officers, directors, members, managers, grantors to a trust
that is an Investor, advisors, partners and each person controlling such Holder, each such underwriter and each person who controls any such underwriter, for any legal and any other expenses reasonably incurred in connection with investigating,
preparing or defending any such claim, loss, damage, liability or action within a reasonable time of such expenses having been incurred, provided that the Company will not be liable in any such case to the extent that any such claim, loss, damage,
liability or expense arises out of or is based on any untrue statement or omission or alleged untrue statement or omission, made in reliance upon and in conformity with written information furnished to the Company by an instrument duly executed by
any Holder, controlling person or underwriter specifically for use therein, or the failure of any Holder to deliver a prospectus that was delivered to the Holder prior to a sale or sales by the Holder. 
  
 (b) Each Holder will, if Registrable Securities held by such Holder are
included in the securities as to which such registration is being effected, indemnify the Company, each of its directors and officers, each underwriter, if any, of the Company’s securities covered by such a registration statement, each person
who controls the Company or such underwriter within the meaning of Section 15 of the Securities Act, each other Holder selling securities covered by such registration statement, and each of the officers, directors, partners and each person
controlling such Holder within the meaning of Section 15 of the Securities Act, against all claims, losses, damages and liabilities (or actions in respect thereof), joint or several, arising out of or based on any untrue statement (or alleged untrue
statement) of a material fact contained in any such registration statement, prospectus, offering circular or other document, or any omission (or alleged omission) to state therein a material fact required to be stated therein or necessary to make
the statements therein not misleading, and will reimburse the Company, such Holders, such directors, officers, persons, underwriters or control persons for any legal or any other expenses reasonably incurred in connection with investigating or
defending any such claim, loss, damage, liability or action within a reasonable time of such expenses having been incurred, in each case to the extent, but only to the extent, that such untrue statement (or alleged untrue statement) or omission (or
alleged omission) is made in such registration statement, prospectus, offering circular or other document in reliance upon and in conformity with written information furnished to the Company by an instrument duly executed by such Holder specifically
for use therein. Notwithstanding the foregoing, the liability of each Holder under this subsection (b) shall be limited to the proportion of any such loss, claim, damage, liability or expense which is equal to the proportion that the public offering
price of the shares sold by such Holder under such registration statement bears to the total public offering price of all securities sold thereunder, but not to exceed the net proceeds received in the ordinary course by such Holder from the sale of
Registrable Securities covered by such registration statement unless such liability resulted from willful misconduct by such Holder. A Holder will not be required to enter into any agreement or undertaking in connection with any registration under
this Section 2 providing for any indemnification or contribution on the part of such Holder greater than the Holder’s obligations under this Section 2.10(b). 
  
 (c) Each party entitled to indemnification under this Section 2.10 (the “Indemnified Party”) shall give
notice to the party required to provide indemnification (the “Indemnifying Party”) promptly after such Indemnified Party has actual knowledge of any claim as to which indemnity may be sought, and shall permit the Indemnifying Party
to assume the defense of any such claim or any litigation resulting therefrom, 
  

 -12- 

 provided that counsel for the Indemnifying Party, who shall conduct the defense of such claim or litigation, shall be
approved by the Indemnified Party (whose approval shall not unreasonably be withheld), and the Indemnified Party may participate in such defense at such party’s expense, and provided further that the failure of any Indemnified Party to give
notice as provided herein shall not relieve the Indemnifying Party of its obligations under this Section 2 unless the failure to give such notice is materially prejudicial to an Indemnifying Party’s ability to defend such action and provided
further, that the Indemnifying Party shall not assume the defense for matters as to which there is a conflict of interest or separate and different defenses but shall bear the expense of such defense nevertheless, provided that the
Indemnifying Party shall not bear the expense of more than one separate counsel in such event. No Indemnifying Party, in the defense of any such claim or litigation, shall, except with the consent of each Indemnified Party, consent to entry of any
judgment or enter into any settlement which does not include as an unconditional term thereof the giving by the claimant or plaintiff to such Indemnified Party of a release from all liability in respect to such claim or litigation. 
  
 (d) If the indemnification provided for paragraphs (a) through (c) of this
Section 2.10 is unavailable to hold harmless an Indemnified Party under such paragraphs in respect of any losses, claims, damages or liabilities or actions in respect thereof referred to therein, then each Indemnifying Party shall in lieu of
indemnifying such Indemnified Party contribute to the amount paid or payable by such Indemnified Party as a result of such losses, claims, damages, liabilities or actions in such proportion as appropriate to reflect the relative fault of the
Company, on the one hand, and the underwriters and the Holder of such Registrable Securities, on the other, in connection with the statements or omissions which resulted in such losses, claims, damages, liabilities or actions as well as any other
relevant equitable considerations, including the failure to give any notice under paragraph (c). The relative fault shall be determined by reference to, among other things, whether the untrue or alleged untrue statement of a material fact relates to
information supplied by the Company, on the one hand, or the underwriters or the Holders of such Registrable Securities, on the other, and to the parties’ relative intent, knowledge, access to information and opportunity to correct or prevent
such statement or omission. The Company and each of the Holders agrees that it would not be just and equitable if contributions pursuant to this paragraph were determined by pro rata allocation (even if all of the Holders of such
Registrable Securities were treated as one entity for such purpose) or by any other method of allocation which did not take account of the equitable considerations referred to above in this paragraph. The amount paid or payable by an Indemnified
Party as a result of the losses, claims, damages, liabilities or action in respect thereof, referred to above in this paragraph, 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 paragraph, no Holder shall be required to contribute any amount in excess of the lesser of (i) the proportion that the public offering price of shares sold
by such Holder under such registration statement bears to the total public offering price of all securities sold thereunder, but not to exceed the net proceeds received in the ordinary course by such Holder for the sale of Registrable Securities
covered by such registration statement and (ii) the amount of any damages which they would have otherwise been required to pay by reason of such untrue or alleged untrue statement or omission. No person guilty of fraudulent misrepresentations
(within the meaning of Section 11(f) of the Securities Act), shall be entitled to contribution from any person who is not guilty of such fraudulent misrepresentation. 
  
 2.11 Information by Holder. The Holder or Holders of Registrable Securities included in any registration shall
furnish to the Company such information regarding such Holder or Holders, the Registrable Securities held by them, and the distribution proposed by such Holder or Holders as the Company may reasonably request in writing and as shall be required in
connection with any registration referred to in this Section 2. 
  
 2.12 Rule 144 Reporting. With a view to making available the benefits of certain rules and regulations of the Commission which may permit the sale of the Restricted Securities to the public 
  

 -13- 

 without registration or pursuant to a registration on Form S-3, after such time as a public market exists for the Common
Stock of the Company, the Company agrees to use its best efforts to: 
  
 (a) Make and keep public information available, as those terms are understood and defined in Rule 144 under the Securities Act, at all times after the effective date the Company becomes subject to the reporting requirements of the
Securities Act or the Exchange Act. 
  
 (b) Use its best efforts
to file with the Commission in a timely manner all reports and other documents required of the Company under the Securities Act and the Exchange Act (at any time after it has become subject to such reporting requirements); 
  
 (c) As long as a Holder owns any Restricted Securities, to furnish to the
Holder forthwith upon request a written statement by the Company as to its compliance with the reporting requirements of Rule 144 (at any time after 90 days after the effective date of the first registration statement filed by the Company for an
offering of its securities to the general public), and of the Securities Act and the Exchange Act (at any time after it has become subject to such reporting requirements) or that it qualifies as a registrant whose securities may be resold pursuant
to Form S-3 (at any time after it so qualifies), a copy of the most recent annual or quarterly report of the Company, and such other reports and documents of the Company and other information in the possession of or reasonably obtainable by the
Company as a Holder may reasonably request in availing itself of any rule or regulation of the Commission allowing a Holder to sell any such securities without registration or pursuant to such form. 
  
 2.13 Transfer of Registration Rights. The rights to cause the Company
to register securities granted Holders under Sections 2.5, 2.6 and 2.7 may be assigned to a transferee or assignee (a) in connection with any transfer or assignment by a Holder of more than 250,000 shares of Registrable Securities (as adjusted for
stock splits, stock dividends, subdivisions, combinations, recapitalizations and the like), or to any transferee or assignee who is (i) an “affiliate” (as defined in Rule 405 under the Securities Act) or a subsidiary, parent, general
partner, limited partner, retired partner, member or retired member of a Holder or (ii) a member of Holder’s immediate family or a trust for the benefit of a Holder who is an individual; provided that (b)(i) the Company is, within
a reasonable time after such transfer, furnished with written notice of the name and address of such transferee or assignee and the securities with respect to which such registration rights are being assigned, (ii) such assignment shall be effective
only if immediately following such transfer the further disposition of such securities by the transferee or assignee is restricted under the Securities Act and (iii) the assignee or transferee enters into a written agreement with the Company whereby
the assignee or transferee agrees to be bound by the terms of this Agreement including, but not limited to, the terms of Section 2.14 of this Agreement. For the purposes of determining the number of shares of Registrable Securities held by a
transferee or assignee, the holdings of transferees and assignees of a partnership who are partners or retired partners of such partnership (including spouses and ancestors, lineal descendants and siblings of such partners or spouses who acquire
Registrable Securities by gift, will or intestate succession) shall be aggregated together and with the partnership; provided that all assignees and transferees who would not qualify individually for assignment of registration rights shall
have a single attorney-in-fact for the purpose of exercising any rights, receiving notices or taking any action hereunder. 
  
 2.14 Standoff Agreement. Each Holder agrees, in connection with the Company’s Qualified IPO, not to sell, make any short sale of, loan, grant
any option for the purchase of, or otherwise dispose of any Registrable Securities (other than those included in the registration, if any), without the prior written consent of the underwriters, for one hundred eighty (180) days from the effective
date of such registration; provided, that such restrictions shall not apply to the sale of any shares to an underwriter pursuant to the underwriting agreement, and provided further that the officers and directors of the Company
who own stock of the Company and all greater than one percent (1%) stockholders of the Company, on a 
  

 -14- 

 Fully Diluted Basis, also agree to such restrictions. In order to enforce the foregoing covenant, the Company may impose
stop-transfer instructions with respect to the Registrable Securities of each Holder (and the shares or securities of every other person subject to the foregoing restriction) until the end of such restricted period, and each Holder hereby agrees
that, if so requested, such Holder will execute an agreement in the form provided by the managing underwriter containing terms which are essentially consistent with the provisions of this Section 2.14. 
  
 2.15 Termination of Registration Rights. The rights granted under this
Section 2 shall terminate on the earlier to occur of the following: (i) the fifth anniversary of the consummation of the Company’s Qualified IPO; or (ii) as to a particular Holder, when such Holder is eligible to sell all of its Registrable
Securities (together with any affiliate of the Holder with whom such Holder must aggregate its sales under Rule 144 under the Securities Act) within a 90 day period in reliance on Rule 144 under the Securities Act. 
  
 2.16 Limitations on Subsequent Registration Rights. From and after the
date of this Agreement, the Company shall not enter into any agreement granting any holder or prospective holder of any securities of the Company registration rights that are senior or pari passu to the registration rights granted to the Registrable
Securities hereunder, unless such holder derives its rights as an additional Holder hereunder pursuant to Section 5.2 below. 
  
 3. Investors’ Right of First Refusal. 
  
 3.1 Genentech Right of First Refusal Upon Issuances of Securities by the Company. Concurrent with the Second Closing of the Financing pursuant to
Section 2.3 of the Series A Purchase Agreement, the Company shall grant to Genentech specific rights of first refusal as set forth in the Genentech Investor Rights Agreement attached to the Series A Stock Purchase Agreement as Exhibit D-2.
Such rights of first refusal may not be amended or waived without the express written consent of Genentech. 
  
 3.2 Right of First Refusal Upon Issuances of Securities by the Company. 
  
 (a) The Company hereby grants, on the terms set forth in this Section 3.2, to each other Investor who holds more than
250,000 Shares or Conversion Stock (as adjusted for stock splits, stock dividends, subdivisions, combinations, recapitalizations and the like) the right of first refusal to purchase all or any part of such Investor’s pro rata share of any New
Securities (as defined in Section 3.2(b)) which the Company may, from time to time, propose to sell and issue. The Investors may purchase such New Securities on the same terms and at the same price at which the Company proposes to sell the New
Securities. The pro rata share of each Investor, for purposes of this right of first refusal, is the ratio of (x) the total number of shares of Common Stock held by such Investor (including any shares of Common Stock into which shares of Preferred
Stock held by such Investor are convertible) to (y) the Outstanding Capitalization of the Company, in each case, as of immediately prior to the issuance of the New Securities. 
  
 (b) “New Securities” shall mean any capital stock of the Company, whether now authorized or not, and any
rights, options or warrants to purchase such capital stock, and securities of any type whatsoever that are, or may become, convertible into such capital stock; provided that “New Securities” does not include (i) the Shares and the
Conversion Stock; (ii) securities offered pursuant to a bona fide, firmly underwritten public offering pursuant to a registration statement filed under the Securities Act; (iii) securities issued to officers, directors or employees of, or
consultants or advisors to, or placement agents or other service providers for the Company pursuant to plans, agreements or arrangements approved by the Board of Directors; (iv) securities issued pursuant to the conversion or exercise of the Series
A Warrants, the Common Stock Warrant or any other outstanding convertible or exercisable securities; (v) securities issued in connection with bona fide acquisitions, whether by merger, consolidation, sale of assets, sale or exchange of 

 

 -15- 

 stock or otherwise, as approved by the Board of Directors; (vi) securities issued to outside consultants or in
consideration of collaborations or agreements to license technology and/or provide sponsored research or other strategic partnership agreements, which agreements have been approved by the Board of Directors, (vii) securities issued in connection
with bona fide equipment leasing, real estate leases, commercial credit arrangements, debt financings, equipment or real estate financings or other loan arrangements approved by the Board of Directors; and (viii) securities issued in consideration
of obligations under the Genentech License Agreement. 
  
 (c) In
the event the Company proposes to undertake an issuance of New Securities, it shall deliver to the Investors written notice (the “Notice”) of its intention, describing the type of New Securities, the price, the terms upon which the
Company proposes to issue the same, and a statement as to the number of days from delivery of such Notice within which the Investors must respond to such Notice. The Investors shall have twenty (20) days from the delivery of the Notice to purchase
their pro rata portion (as defined in Section 3.2(a)) of the New Securities, for the price and upon the terms specified in the Notice, by giving written notice to the Company and stating therein the quantity of New Securities to be purchased (the
“Investor Notice”) and forwarding payment for such New Securities to the Company if immediate payment is required by such terms. 
  
 (d) In the event the Investors fail to exercise in full the right of first refusal within the twenty (20) or thirty (30) day period, as the case may be,
following delivery of the Notice, the Company shall have ninety (90) days thereafter to sell or enter into an agreement (pursuant to which the sale of New Securities covered thereby shall be closed, if at all, within thirty (30) days from the date
of such agreement) to sell the New Securities with respect to which the Investors’ rights were not exercised, at a price and upon general terms no more favorable to the purchasers thereof than specified in the Notice. In the event the Company
has not sold the New Securities within such ninety (90) day period (or sold and issued New Securities in accordance with the foregoing within thirty (30) days from the date of such agreement), the Company shall not thereafter issue or sell any New
Securities without first offering such securities to the Investors in the manner provided above. 
  
 (e) The Company shall, within twenty-five (25) days of delivery of the Notice pursuant to Section 3(d) above, inform, in writing, each Investor that
timely delivers an Investor Notice (defined below) and elects to purchase its entire pro rata share of the New Securities (each a “Fully-Exercising Investor”) of any other Investor’s failure to do likewise. Within thirty (30)
days of delivery of the Notice, each Fully-Exercising Investor may elect to purchase that portion of the New Securities for which other Investors were entitled to subscribe, pursuant to Section 3.2(a), but which were not subscribed for by such
Investors, that is equal to the ratio of (x) the total number of shares of Common Stock held by such Fully Exercising Investor (including any shares of Common Stock into which shares of Preferred Stock held by such Investor are convertible) to (y)
the total number of shares of Common Stock held by all Fully-Exercising Investors (including any shares of Common Stock into which shares of Preferred Stock held by such Investors are convertible). 
  
 (f) The right of first refusal granted under Section 3.2 shall expire upon
the first to occur of: 
  
 (i) The closing of the Company’s
Qualified IPO; or 
  
 (ii) For each Investor, the date on which
such Investor (and its affiliates) no longer holds a minimum of 250,000 Shares or Conversion Stock (as adjusted for stock splits, stock dividends, subdivisions, combinations, recapitalizations and the like). 
  

 -16- 

 (g) The right of an Investor to purchase any part of the New Securities may be assigned by such Investor
in whole or in part to any partner, subsidiary, member, affiliate or stockholder of such Investor. 
  
 4. Affirmative Covenants of the Company. The Company hereby covenants and agrees as follows: 
  
 4.1 Financial Information. As long as an Investor continues to hold
more than 250,000 Shares or Conversion Stock (as adjusted for stock splits, stock dividends, subdivisions, combinations, recapitalizations and the like), the Company will provide such Investor with the reports set forth below: 
  
 (a) As soon as practicable after the end of each fiscal year (beginning with
the fiscal year ending December 31, 2003), and in any event within one hundred twenty (120) days thereafter, consolidated balance sheets of the Company and its subsidiaries, if any, as of the end of such fiscal year, and consolidated statements of
income and consolidated statements of changes in financial position of the Company and its subsidiaries, if any, for such year, prepared in accordance with generally accepted accounting principles and setting forth in each case in comparative form
the Company’s fiscal budget proposed for such period and the figures for the previous fiscal year, all in reasonable detail and audited by independent public accountants of national standing selected by the Company. 
  
 (b) As soon as practicable after the end of each quarter, and in any event
within forty-five (45) days after each quarterly accounting period, an unaudited quarterly report including a balance sheet, profit and loss statement and cash flow analysis (prepared in accordance with generally accepted accounting principles other
than for accompanying notes and subject to changes resulting from year-end audit adjustments) and related variation analysis from the fiscal budget proposed for such period and prior quarterly periods since the end of the prior fiscal year.

  
 (c) Within thirty (30) days following a request by such
Investor, an unaudited income statement and statement of cash flows and balance sheet for and as of the end of such month, in reasonable detail. 
  
 (d) such other information relating to the financial condition, business or corporate affairs of the Company as such Investor may from time to time
reasonably request; provided, however, that the Company shall not be obligated under this subsection (d) or any other subsection of Section 4.1 to provide information that it deems in good faith to be a trade secret or similar
confidential information. 
  
 4.2 Board of Directors. All
members of the Board of Directors shall be furnished with (a) prior to each fiscal year-end, a business plan and projected financial statements for the next period; (b) notification of material litigation matters and (c) copies of all filings made
with the Commission, if any. 
  
 4.3 Assignment of Rights to
Financial Information. The rights granted pursuant to Section 4.1 may not be assigned or otherwise conveyed by any Investor or by any subsequent transferee of any such rights without the prior written consent of the Company. 
  
 4.4 Inspection. The Company shall permit each Investor, at such
Investor’s expense, to visit and inspect the Company’s properties, to examine its books of account and records and to discuss the Company’s affairs, finances and accounts with its officers, all at such reasonable times as may be
requested by the Investor; provided, however, that the Company shall not be obligated pursuant to this Section 4.3 to provide access to any information which it reasonably considers to be a trade secret or similar confidential
information. 
  

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 4.5 Termination of Covenants. The covenants set forth in Sections 4.1, 4.2 and 4.3 shall terminate
and be of no further force or effect upon the closing of the Company’s first firm commitment underwritten public offering pursuant to an effective registration statement filed by the Company under the Securities Act. 
  
 4.6 Stock Transfer Restrictions. The Company shall ensure that all
securities issued by the Company, including options and warrants, are subject to market stand-off provisions substantially similar to those provided in Section 2.14 of this Agreement. Unless otherwise approved by the Board of Directors, the Company
shall use its commercially reasonable efforts to cause each current and future employee of the Company, holding shares of Common Stock representing at least 0.25% of the then-outstanding capital stock of the Company on a Fully Diluted Basis, to sign
an agreement with the Company in which such employee agrees not to dispose of any shares of the Company’s Common Stock owned by him or her (unless the Board of Directors, including a majority of the Series A Directors and at least one Series B
Director (as defined in the Voting Agreement attached as Exhibit E to the Series B Purchase Agreement) consents to the proposed transfer), until the earliest to occur of the following: (a) there remain outstanding less than 10,000,000 shares
of the Preferred Stock purchased by the Investors in the Series A or Series B Financing; (b) the closing of the Company’s Qualified IPO; (c) the closing of any liquidation, dissolution, or winding up of the Company whether voluntary or
involuntary including any sale, exchange, conveyance or other disposition of the capital stock of the Company in a transaction or series of related transactions in which more than fifty percent (50%) of the voting power of the Company is disposed
of, or the sale of all or substantially all of the Company’s assets; and (d) the eighth anniversary of the Initial Closing (as defined in the Series A Purchase Agreement) of the Series A Financing. 
  
 Notwithstanding the foregoing, such agreement will contain standard
provisions permitting the transfer of the Company’s Common Stock by such employees without the approval of the Company’s Board of Directors: (a) in connection with repurchases by the Company; (b) for estate planning purposes or divorce
proceedings, or as otherwise required by law; (c) as a pledge in connection with a bona fide loan transaction which creates a mere security interest; and (d) in an amount not to exceed an aggregate of 5% of the Common Stock owned by such employee,
for any purpose. Such agreement shall also provide that these provisions (and the provisions set forth in the preceding paragraph) may not be amended or waived in any manner to the detriment of the employee without the express written consent of
such employee. 
  
 4.7 Indebtedness. The Company agrees
that it will not incur debt of an amount greater than (a) $1,000,000 individually in any transaction or series of related transactions, or (b) $2,500,000 in the aggregate within any twelve (12) month period, without the prior written consent of the
Board of Directors, including the consent of a majority of the Series A Directors and the Series B Directors, voting together as a group (in each case, as such terms are defined in the Amended and Restated Voting Agreement attached as Exhibit
E to the Series B Purchase Agreement). This covenant shall terminate effective as of immediately prior to the Company’s Qualified IPO. 
  
 4.8 Directors’ Liability and Indemnification; Reimbursement. The Company’s Amended and Restated Certificate of Incorporation and
Bylaws shall provide (a) for elimination of the liability of directors to the maximum extent permitted by law and (b) for indemnification of directors for acts on behalf of the Company to the maximum extent permitted by law for so long as any
representatives of the Investors shall serve on the Company’s Board of Directors. In addition, the Company shall enter into and use commercially reasonable efforts to at all times maintain indemnification agreements substantially in the form
previously provided to the Investors with each of its directors to indemnify such directors to the maximum extent permissible under applicable law. The Company shall maintain, to the extent commercially reasonable, directors’ and officers’
insurance with coverage levels substantially similar to those provided pursuant to the Company’s directors’ and officers’ insurance policy as currently in effect. The Company shall reimburse 
  

 -18- 

 directors for their reasonable expenses in connection with attendance at meetings of the Board of Directors of the
Company. 
  
 4.9 Proprietary Information Agreements. The
Company will cause each person now or hereafter employed by it or any subsidiary with access to confidential information to enter into an At-Will Employment, Confidential Information, Invention Assignment and Arbitration Agreement (a
“Proprietary Information Agreement”) substantially in the form approved by the Board of Directors. In addition, the Company will use its best efforts to cause each consultant now or hereinafter engaged by it or any subsidiary with
access to confidential information to enter into a written agreement with terms and conditions substantially similar to the terms and conditions of such form of Proprietary Information Agreement with respect to such consultant’s obligations to
maintain the confidentiality of information of the Company and obligations to convey and assign to the Company all of its development work performed for the Company. 
  
 4.10 Composition of Compensation Committee. The Company shall, at all times, maintain a compensation committee of the
Board of Directors of the Company and cause at least one Series B Director (as such term is defined in the Restated Certificate) to be a member of such committee. 
  
 5. Miscellaneous. 
  
 5.1 Amendments and Waivers. With the written consent of (i) the Company, (ii) the holders of a majority-in-interest of the then-outstanding
Registrable Securities (not including the Founder Shares) and (iii) the holders of at least sixty percent (60%) of the outstanding shares of Series B Preferred Stock, the obligations of the Company and the rights of the holders of the Registrable
Securities under this Agreement may be waived or amended (either generally or in a particular instance, either retroactively or prospectively and either for a specified period of time or indefinitely); provided that if such waiver or
amendment has the effect of affecting the Founder Shares in a manner adverse to the interests of the holders of the Founder Shares, then such amendment shall require the consent of the holder or holders of a majority of the Founder Shares. With the
same consent, the Company, when authorized by resolution of its Board of Directors, may enter into a supplementary agreement for the purpose of adding any provisions to or changing in any manner or eliminating any of the provisions of this
Agreement. Upon the effectuation of each such waiver, consent, agreement, amendment or modification, the Company shall promptly give written notice thereof to the holders of the Registrable Securities who have not previously consented thereto in
writing. Neither this Agreement nor any provisions hereof may be changed, waived, discharged or terminated orally, but only by a signed statement in writing. Notwithstanding anything to the contrary set forth herein, no waiver, amendment or
modification may be made to Section 3.1 of this Agreement without the express written consent of Genentech and the Company. Notwithstanding anything to the contrary set forth herein, no waiver, amendment or modification may be made to Sections 4.6
through 4.10 without the express written consent of (i) the holders of at least a majority of the outstanding shares of Preferred Stock and (ii) the holders of at least sixty percent (60%) of the outstanding shares of Series B Preferred Stock;
provided that with respect to Section 4.6, the provisions may not be amended or waived in any manner to the detriment of the employee subject thereto, without the express written consent of such employee. 
  
 5.2 Additional Parties. Subject to Section 2.16 above, the parties
hereto agree that additional holders of securities of the Company may, with the written consent of the Company and holders of a majority-in-interest of the Registrable Securities (not including the Founder Shares), be added as parties to this
Agreement with respect to any or all securities of the Company held by such additional holders, and shall thereupon be deemed for all purposes “Holders” hereunder. Any such additional party shall execute a counterpart of this Agreement,
and upon execution by such additional party and by the Company, shall be considered a Holder for purposes of this Agreement. 
  

 -19- 

 5.3 Genentech Investor Rights Agreement. By execution of this Agreement, each Investor hereby
severally agrees to the rights of first refusal granted to Genentech pursuant to the Genentech Rights Agreement. 
  
 5.4 Aggregation of Stock. All shares of Registrable Securities held or acquired by affiliated entities or persons shall be aggregated together for
the purpose of determining the availability of rights under this Agreement; provided that all such affiliated entities shall designate in writing a single attorney-in-fact for the purpose of exercising any rights, receiving notices or taking
any action hereunder, and shall provide notice of any such designation to the Company. 
  
 5.5 Stock Splits. All references to numbers of shares in this Agreement shall be appropriately adjusted to reflect any stock dividend, split, combination or other recapitalization of shares by the Company
occurring after the date of this Agreement. 
  
 5.6 Governing
Law. This Agreement shall be governed in all respects by the internal laws of the State of California as applied to agreements entered into among California residents to be performed entirely within California. 
  
 5.7 Successors and Assigns. Except as otherwise provided herein, this
Agreement is for the benefit of, and shall be binding upon, the parties hereto and their respective heirs, personal representatives, successors and assigns. Nothing in this Agreement, express or implied, is intended to confer upon any party other
than the parties hereto or their respective successors and assigns any rights, remedies, obligations, or liabilities under or by reason of this Agreement, except as expressly provided in this Agreement. 
  
 5.8 Entire Agreement. This Agreement and the Genentech Rights
Agreement constitute the full and entire understanding and agreement between the parties regarding the matters set forth herein and all other written or oral agreements existing between the parties hereto with respect to the matters set forth herein
(including the Investor Rights Agreement entered into in connection with the sale by the Company of its Series A Preferred Stock) are expressly cancelled. 
  
 5.9 Notices. All notices and other communications required or permitted hereunder shall be in writing and shall be mailed by registered mail,
certified mail (return receipt requested) or by internationally recognized express courier (e.g., Federal Express), postage prepaid, or sent by fax or electronic mail or otherwise delivered by hand or by messenger addressed: 
  
 (a) if to an Investor, at the Investor’s address, fax number or
electronic mail address set forth on Exhibit A, Exhibit B, Exhibit C-1 or Exhibit C-2 hereto, or at such other address as such Investor shall have furnished to the Company; 
  
 (b) if to the Company, one copy should be sent to its address or fax number
of record and addressed to the attention of the President, or at such other address or fax number as the Company shall have furnished to the parties hereto, with a copy to Selim Day, Wilson Sonsini Goodrich & Rosati, Professional Corporation,
650 Page Mill Road, Palo Alto, California 94304 (fax) 650-493-6811; or 
  
 (c) if to a Founder, at the Founder’s address, fax number or electronic mail address set forth on Exhibit D hereto, or at such other address as such Founder shall have furnished to the Company. 
  
 (d) Each such notice shall for all purposes of this Agreement be treated as
effective or having been given on the earliest to occur of the following: 
  
 (i) The date of personal delivery or delivery by messenger; 
  

 -20- 

 (ii) One (1) business day after transmission by facsimile or electronic mail, with confirmation of
transmission and copy by first class mail, postage prepaid; 
  
 (iii) One (1) business day after deposit with an internationally recognized express courier for United States deliveries, or three (3) business days after such deposit for deliveries outside of the United States; or 
  
 (iv) Three (3) business days after deposit in a regularly maintained
receptacle for the deposit of the United States mail by registered or certified mail (return receipt requested) for United States deliveries. 
  
 5.10 Titles and Subtitles. The titles of the paragraphs and subparagraphs of this Agreement are for convenience of reference only and are not to be
considered in construing this Agreement. 
  
 5.11
Severability. If one or more provisions of this Agreement are held to be unenforceable under applicable law, the parties agree to renegotiate such provision in good faith. In the event that the parties cannot reach a mutually agreeable and
enforceable replacement for such provision, then (a) such provision shall be excluded from this Agreement, (b) the balance of the Agreement shall be interpreted as if such provision were so excluded and (c) the balance of the Agreement shall be
enforceable in accordance with its terms. 
  
 5.12
Counterparts. This Agreement may be signed and delivered in two or more counterparts, each of which shall be deemed an original and all of which together will constitute one and the same instrument. 
  
 5.13 Founder Shares. The number of Founder Shares owned by the
Founders shall be updated from time to time and reflected on an addendum to Exhibit D hereto, a copy of which addendum shall be distributed to the Investors on a periodic basis, as appropriate. 
  
 [Remainder of page intentionally left blank] 
  
  

 -21- 

 IN WITNESS WHEREOF, the parties have executed this Amended and Restated Investors’ Rights Agreement as of the day
and year first set forth above. 
  

	 “COMPANY”
  
 TERCICA MEDICA, INC.,
 A Delaware Corporation

		
	By:	 	/s/    JOHN A. SCARLETT      
	 	

	 	 	 John A. Scarlett, M.D.
 President and Chief Executive Officer

  
 [SIGNATURE PAGE TO
AMENDED AND RESTATED INVESTORS’ RIGHTS AGREEMENT] 

 “INVESTORS” 
  

	 RHO VENTURES IV, L.P.
  
 By:   Rho Management Ventures IV, L.L.C.,
          General Partner
	 	 	 	 RHO VENTURES IV (QP), L.P.
  
 By:   Rho Management Ventures IV, L.L.C.,
          General Partner

					
	By:	 	 /s/    MARK
LESCHLY        

	 	 	 	By:	 	 /s/    MARK
LESCHLY        

	Name:	 	 Mark Leschly

	 	 	 	Name:	 	 Mark Leschly

	Title:	 	 Managing Member

	 	 	 	Title:	 	 Managing Member

	Address:	 	 152 W. 57th Street, 23rd Floor
 New York, New York 10019
	 	 	 	Address:	 	 152 W. 57th Street, 23rd Floor
 New York, New York 10019

  

	 RHO VENTURES IV GMBH & CO.
 BETILIGUNGS KG
  
 By:   Rho Capital Partners Verwaltungs GmbH,
          General Partner
	 	 	 	 RHO MANAGEMENT TRUST I
  
  
 By:   Rho Capital Partners, Inc., as Investment
          Adviser

					
	By:	 	 /s/    MARK
LESCHLY        

	 	 	 	By:	 	 /s/    MARK
LESCHLY        

	Name:	 	 Mark Leschly

	 	 	 	Name:	 	 Mark Leschly

	Title:	 	 Managing Director

	 	 	 	Title:	 	 Managing Partner

	Address:	 	 152 W. 57th Street, 23rd Floor
 New York, New York 10019
	 	 	 	Address:	 	 152 W. 57th Street, 23rd Floor
 New York, New York 10019

  
 [SIGNATURE PAGE TO
AMENDED AND RESTATED INVESTORS’ RIGHTS AGREEMENT] 

	 CARE CAPITAL INVESTMENTS II, LP
 By: Care Capital II, LLC,
 as General Partner Of Care
Capital Investments II, LP

		
	By:	 	 /s/    DAVID
RAMSAY        

	Name:	 	 David Ramsay

	Title	 	 Partner

  
 [SIGNATURE PAGE TO
AMENDED AND RESTATED INVESTORS’ RIGHTS AGREEMENT] 

	MEDIMMUNE VENTURES, INC.
		
	By:	 	/s/    WAYNE T. HOCKMEYER        
	 	

	 	 	 Wayne T. Hockmeyer, Ph.D.,
 President

  
 [SIGNATURE PAGE TO
AMENDED AND RESTATED INVESTORS’ RIGHTS AGREEMENT] 

	MPM BIOVENTURES III, LP	 	 	 	 MPM ASSET MANAGEMENT
INVESTORS
 2002 BVIII LLC

					
	By:	 	MPM BioVentures III GP, L.P., its General Partner	 	 	 	 	 	 
					
	By:	 	MPM BioVentures III LLC, its General Partner	 	 	 	By:	 	 /s/    DENNIS
HENNER        

 Dennis Henner
 Manager

					
	By:	 	 /s/    DENNIS
HENNER        

	 	 	 	 	 	 
	 	 	 Dennis Henner
 Series A Member
	 	 	 	 	 	 

  

	 MPM BIOVENTURES III-QP, LP
	 	 	 	 MPM BIOEQUITIES FUND GMBH & CO.
KG

					
	By:	 	MPM BioVentures III GP, L.P., its General Partner	 	 	 	By:	 	MPM BioEquities GP, L.P., in its capacity as the Managing Limited Partner
					
	By:	 	MPM BioVentures III LLC, its General Partner	 	 	 	By:	 	MPM BioEquities GP LLC, its General Partner
					
	By:	 	 /s/    DENNIS
HENNER        

	 	 	 	By:	 	 /s/    ROBERT
LIPTAK        

	 	 	 Dennis Henner
 Series A Member
	 	 	 	 	 	 Robert W. Liptak
 Manager

  

	 MPM BIOVENTURES III PARALLEL FUND, LP
	 	 	 	 MPM BIOEQUITIES MASTER FUND, LP

					
	By:	 	MPM BioVentures III GP, L.P., its General Partner	 	 	 	By:	 	MPM BioEquities GP, L.P., its General Partner
					
	By:	 	MPM BioVentures III LLC, its General Partner	 	 	 	By:	 	MPM BioEquities GP LLC, its General Partner
					
	By:	 	 /s/    DENNIS
HENNER        

	 	 	 	By:	 	 /s/    ROBERT
LIPTAK        

	 	 	 Dennis Henner
 Series A Member
	 	 	 	 	 	 Robert W. Liptak
 Manager

  

	 MPM BIOVENTURES III GMBH & CO.
PARALLEL-
 BETEILIGUNGS KG
	 	 	 	 
					
	 By:
	 	MPM BioVentures III GP, L.P., in its capacity as the Managing Limited Partner	 	 	 	 	 	 
					
	 By:
	 	MPM BioVentures III LLC, its General Partner	 	 	 	 	 	 
					
	 By:
	 	 /s/    DENNIS
HENNER        

	 	 	 	 	 	 
	 	 	 Dennis Henner
 Series A Member
	 	 	 	 	 	 

  
 [SIGNATURE PAGE TO
AMENDED AND RESTATED INVESTORS’ RIGHTS AGREEMENT] 

	PROSPECT VENTURE PARTNERS II, L.P.
		
	By:	 	Prospect Management Co. II, LLC, its General Partner
		
	By:	 	 /s/    ALEX
BARKAS        

	 	 	 Alex Barkas
 Managing Member

  

	PROSPECT ASSOCIATES II L.P.
		
	By:	 	Prospect Management Co. II, LLC, its General Partner
		
	By:	 	 /s/    ALEX
BARKAS        

	 	 	 Alex Barkas
 Managing Member

  
 [SIGNATURE PAGE TO
AMENDED AND RESTATED INVESTORS’ RIGHTS AGREEMENT] 

	T-BOLAGET AB
		
	By:	 	 /s/    PETTER
WINGSTRAND        

	 	 	 Petter Wingstrand
 Chairman

  
 [SIGNATURE PAGE TO
AMENDED AND RESTATED INVESTORS’ RIGHTS AGREEMENT] 

	TEXCEL INTERNATIONAL AB
		
	By:	 	 /s/    GREGER
ERICSSON        

	 	 	 Greger Ericsson
 Director

  
 [SIGNATURE PAGE TO
AMENDED AND RESTATED INVESTORS’ RIGHTS AGREEMENT] 

	 WS INVESTMENT COMPANY, LLC (2003A)
	 	 	 	 WS INVESTMENT COMPANY, LLC
 (2002A – MANDATORY FUND)

					
	By:	 	 /s/    JAMES
TERRANOVA        

	 	 	 	By:	 	 /s/    JAMES
TERRANOVA        

	Name:	 	
	 	 	 	Name:	 	

	Title:	 	
	 	 	 	Title:	 	

  
  

	 WS INVESTMENT COMPANY, LLC (2003C)
	 	 	 	 WS INVESTMENT COMPANY, LLC
 (2002C – VOLUNTARY FUND)

					
	By:	 	 /s/    JAMES
TERRANOVA        

	 	 	 	By:	 	 /s/    JAMES
TERRANOVA        

	Name:	 	
	 	 	 	Name:	 	

	Title:	 	
	 	 	 	Title:	 	

  
  

	 KEN CLARK
	 	 	 	 SELIM DAY

					
	 	 	 /s/    KEN
CLARK        

	 	 	 	 	 	 /s/    SELIM
DAY        

	 	 	 	 	 	 	 	 	 

  
 [SIGNATURE PAGE TO
AMENDED AND RESTATED INVESTORS’ RIGHTS AGREEMENT] 
  

 EXHIBIT A 
  
 NEW INVESTORS 
  
 (Purchasers of Series B Preferred Stock) 
  
 July 9, 2003 
  

	 Name

	  	Aggregate Number of Shares of
Series B Preferred Stock

	 Rho Ventures IV, L.P.
 152 W. 57th Street, 23rd Floor
 New York, NY 10019
 email: mleschly@rho.com
	  	1,001,683
		
	 Rho Ventures IV GmbH & Co. Betiligungs KG
 152 W. 57th Street, 23rd Floor
 New York, NY 10019
 email: mleschly@rho.com
	  	2,457,601
		
	 Rho Ventures IV (QP), L.P.
 152 W. 57th Street, 23rd Floor
 New York, NY 10019
 email: mleschly@rho.com
	  	2,358,211
		
	 Rho Management Trust I
 152 W. 57th Street, 23rd Floor
 New York, NY 10019
 email: mleschly@rho.com
	  	2,182,505
		
	 Care Capital Investments II, LP
 47 Hulfish Street, Ste 310
 Princeton, NJ 08542
 Fax: (609) 683-5787
 email: dancabo@carecapital.com
	  	4,000,000
		
	 MedImmune Ventures, Inc.
 35 West Watkins Mill Rd.
 Gaithersburg, MD 20878
 Attn: Legal Affairs
 Fax: (240) 632-4189
 email: sarana@medimmune.com
	  	4,000,000

  

	 Name

	  	Aggregate Number of Shares of
Series B Preferred Stock

	 MPM Asset Management Investors 2002 BVIII LLC
 111 Huntington Avenue, 31st Floor
 Boston, MA 02199
 Fax: (617) 425-9201
 email: dhenner@mpmcapital.com
	  	210,445
		
	 MPM BioVentures III Parallel Fund, LP
 111 Huntington Avenue, 31st Floor
 Boston, MA 02199
 Fax: (617) 425-9201
 email: dhenner@mpmcapital.com
	  	321,792
		
	 MPM BioEquities Master Fund, LP
 111 Huntington Avenue, 31st Floor
 Boston, MA 02199
 Fax: (617) 425-9201
 email: dhenner@mpmcapital.com
	  	1,183,321
		
	 MPM BioEquities Fund GmbH & Co. KG
 111 Huntington Avenue, 31st
 Floor Boston, MA 02199
 Fax: (617) 425-9201
 email: dhenner@mpmcapital.com
	  	16,679
		
	 MPM BioVentures III, LP
 111 Huntington Avenue, 31st Floor
 Boston, MA 02199
 Fax: (617) 425-9201
 email: dhenner@mpmcapital.com
	  	716,160
		
	 MPM BioVentures III-QP, LP
 111 Huntington Avenue, 31st Floor
 Boston, MA 02199
 Fax: (617) 425-9201
 email: dhenner@mpmcapital.com
	  	10,651,507
		
	 MPM BioVentures III GmbH & Co. Parallel-Beteiligungs KG
 111 Huntington Avenue, 31st Floor
 Boston, MA 02199
 Fax: (617) 425-9201
 email: dhenner@mpmcapital.com
	  	900,096

  

 A-2 

	 Name

	  	Aggregate Number
of Shares of Series
B Preferred Stock

	 Prospect Venture Partners II, L.P.
 435 Tasso
St. #200
 Palo Alto, CA 94301
 email:
chen@prospectventures.com
	  	4,728,000
		
	 Prospect Associates II L.P.
 435 Tasso St.
#200
 Palo Alto, CA 94301
 email:
chen@prospectventures.com
	  	72,000
		
	 T-Bolaget
 Box 110 28
 Sôdra Hamngatan 23
 SE-404 21
 Gôteborg Sweden
 email: petter@t-bolaget.se
	  	240,000
		
	 Texcel International AB
 P.O. Box
5712
 SE-114 87 Stockholm
 Sweden
 email: greger.ericsson@servisen.se
	  	240,000
		
	 WS Investment Company, LLC (2003A)
 650 Page
Mill Road
 Palo Alto, CA 94304
 email:
jterranova@wsgr.com
	  	10,800
		
	 WS Investment Company, LLC (2003C)
 650 Page
Mill Road
 Palo Alto, CA 94304
 email:
jterranova@wsgr.com
	  	23,800
		
	 Ken Clark
 c/o Wilson Sonsini Goodrich &
Rosati, P.C.
 650 Page Mill Road
 Palo Alto, CA
94304-1050
 Fax: (650) 493-6811
 email:
kclark@wsgr.com
	  	4,000

  

 A-3 

	 Name

	  	Aggregate Number
of Shares of Series
B Preferred Stock

	 Selim Day
 c/o Wilson Sonsini Goodrich &
Rosati, P.C.
 650 Page Mill Road
 Palo Alto, CA
94304-1050
 Fax: (650) 493-6811
 email:
sday@wsgr.com
	  	4,000

  
  

 A-4 

 EXHIBIT B 
  
 PRIOR INVESTORS 
  

	 Name

	  	Aggregate Number
of Shares of Series
A Preferred Stock

	 MPM BioVentures III, LP
 111 Huntington Avenue, 31st Floor
 Boston, MA 02199
 Fax: (617) 425-9201
 email: dhenner@mpmcapital.com
	  	1,103,895
		
	 MPM BioVentures III-QP, LP
 111 Huntington Avenue, 31st Floor
 Boston, MA 02199
 Fax: (617) 425-9201
 email: dhenner@mpmcapital.com
	  	10,219,763
		
	 MPM BioVentures III GmbH & Co. Parallel-Beteiligungs KG
 111 Huntington Avenue, 31st Floor
Boston, MA 02199
 Fax: (617) 425-9201
 email: dhenner@mpmcapital.com
	  	1,219,792
		
	 MPM Asset Management Investors 2002 BVIII LLC
 111 Huntington Avenue, 31st Floor
 Boston, MA 02199
 Fax: (617) 425-9201
 email: dhenner@mpmcapital.com
	  	206,550
		
	 Prospect Venture Partners II, L.P.
 435 Tasso St. #200
 Palo Alto, CA 94301
 email: chen@prospectventures.com
	  	8,126,250
		
	 Prospect Associates II, L.P.
 435 Tasso St. #200
 Palo Alto, CA 94301
 email: chen@prospectventures.com
	  	123,750
		
	 Genentech, Inc.
 1 DNA Way
 South San Francisco, CA 94080-4990
 Email: myoo@gene.com
	  	4,070,667

	 Name

	  	Aggregate Number
of Shares of Series
A Preferred Stock

	 T-Bolaget
 Box 110 28
 Sôdra Hamngatan 23
 SE-404 21
 Gôteborg
 Sweden
 email: petter@t-bolaget.se
	  	250,000
		
	 Texcel International AB
 P.O. Box 5712
 SE-114 87 Stockholm
 Sweden
 email: greger.ericsson@servisen.se
	  	250,000
		
	 WS Investment Company, LLC
 (2002A-Mandatory Fund)
 650 Page Mill Road
 Palo Alto, CA 94304
 email: jterranova@wsgr.com
	  	45,000
		
	 WS Investment Company, LLC
 (2002C-Voluntary Fund)
 650 Page Mill Road
 Palo Alto, CA 94304
 email: jterranova@wsgr.com
	  	42,500
		
	 Ken Clark
 c/o Wilson Sonsini Goodrich & Rosati, P.C.
 650 Page Mill Road
 Palo Alto, CA 94304-1050
 Fax: (650) 493-6811
 email: kclark@wsgr.com
	  	24,250
		
	 Selim Day
 c/o Wilson Sonsini Goodrich & Rosati, P.C.
 650 Page Mill Road
 Palo Alto, CA 94304-1050
 Fax: (650) 493-6811
 email: sday@wsgr.com
	  	24,250

  
  

 A-2 

 EXHIBIT C-1 
  

	Name

	  	 Warrants Exercisable for the Purchase of
 Series A Preferred Stock

	 T-Bolaget AB
 Box 110 28
 Sôdra Hamngatan 23
 SE-404 21
 Gôteborg
 Sweden
 petter@t-bolaget.se
	  	 (1)    Warrant to purchase 30,000 shares of Series A Preferred Stock dated
January 31, 2002.
  
 (2)    Warrant to purchase 50,000 shares of Series A Preferred Stock dated January 31, 2002.

		
	 Texcel International AB
 P.O. Box
5712
 SE-114 87 Stockholm
 Sweden
 email:greger.ericsson@servisen.se
	  	 (1)    Warrant to purchase 30,000 shares of Series A Preferred Stock dated
January 31, 2002.
  
 (2)    Warrant to purchase 50,000 shares of Series A Preferred Stock dated January 31, 2002.

 EXHIBIT C-2 
  

	 Name

	  	 Warrants Exercisable for the Purchase of
 Common Stock

	 Three Crowns Capital
 c/o Peter
Svennilson
 60 Rutland Gate
 London
 SW7 1PJ
 UK
 email: psvenn@attglobal.net
	  	Warrant to purchase 585,000 shares of Common Stock dated May 16, 2002.

  

 EXHIBIT D 
  
 FOUNDERS 
  

		
	 Name

	  	 Aggregate Number of Shares
 of Common Stock

		
	 The John A. Scarlett III, 1999 Trust
 515 Congress Avenue, Suite 2300
 Austin, TX 78701
 email: chip@id2.com
	  	619,605
		
	 The Susan E. Scarlett 1999 Trust
 515 Congress Avenue, Suite 2300
 Austin, TX 78701
 email: chip@id2.com
	  	619,605
		
	 John A. Scarlett III
 515 Congress Avenue, Suite 2300
 Austin, TX 78701
 email: chip@id2.com
	  	2,059,411
		
	 Boat Harbour Ltd., c/o Ross Clark
 25 Glen Road
 Devonport
 AUCKLAND
 email: rgclark@xtra.co.n2
	  	2,230,571
		
	 Olle Isaksson
 Sahlgrenska University Hospital
 RCEM / Medicinkliniken
 Grona Straket 8
 SE-413 45
 Goteborg
 SWEDEN
 Fax: 46 31 82 1524
 email: olle.isaksson@medic.gu.se
	  	821,045
		
	 The H.S. & G.P. Moore Trust No. 1
 6-8 Nugent St
 PO Box 8729
 Symonds St
 AUCKLAND
 email: howard.moore@tercica.com
	  	721,320<PAGE>

                                                                     Exhibit 4.3

                              SCHLUMBERGER LIMITED

                                                                       as Issuer

                                       and

                                 CITIBANK, N.A.

                                                                      as Trustee

                        ---------------------------------

                                    Indenture

                            Dated as of June 9, 2003

                        ---------------------------------

                                 Debt Securities

<PAGE>

                              SCHLUMBERGER LIMITED

           Reconciliation and tie between Trust Indenture Act of 1939
                     and Indenture, dated as of June 9, 2003

                              ____________________

<TABLE>
<CAPTION>
Section of
Trust Indenture                                                                           Section(s) of
Act of 1939                                                                               Indenture
-----------                                                                               ---------
<S>        <C>                                                                            <C>
(S) 310    (a)(1)....................................................................     7.10
           (a)(2)....................................................................     7.10
           (a)(3)....................................................................     Not Applicable
           (a)(4)....................................................................     Not Applicable
           (a)(5)....................................................................     7.10
           (b).......................................................................     7.08, 7.10
(S) 311    (a).......................................................................     7.11
           (b).......................................................................     7.11
           (c).......................................................................     Not Applicable
(S) 312    (a).......................................................................     2.07
           (b).......................................................................     10.03
           (c).......................................................................     10.03
(S) 313    (a).......................................................................     7.06
           (b).......................................................................     7.06
           (c).......................................................................     7.06
           (d).......................................................................     7.06
(S) 314    (a).......................................................................     4.03, 4.04
           (b).......................................................................     Not Applicable
           (c)(1)....................................................................     10.04
           (c)(2)....................................................................     10.04
           (c)(3)....................................................................     Not Applicable
           (d).......................................................................     Not Applicable
           (e).......................................................................     10.05
(S) 315    (a).......................................................................     7.01(b)
           (b).......................................................................     7.05
           (c).......................................................................     7.01(a)
           (d).......................................................................     7.01(c)
           (d)(1)....................................................................     7.01(c)(1)
           (d)(2)....................................................................     7.01(c)(2)
           (d)(3)....................................................................     7.01(c)(3)
           (e).......................................................................     6.11
(S) 316    (a)(1)(A).................................................................     6.05
           (a)(1)(B).................................................................     6.04
           (a)(2)....................................................................     Not Applicable
</TABLE>

<PAGE>

<TABLE>
<S>        <C>                                                                            <C>
           (a)(last sentence)........................................................     2.11
           (b).......................................................................     6.07
(S) 317    (a)(1)....................................................................     6.08
           (a)(2)....................................................................     6.09
           (b).......................................................................     2.06
(S) 318    (a).......................................................................     10.01
</TABLE>

____________

Note:  This reconciliation and tie shall not, for any purpose, be deemed to be
       a part of the Indenture.

<PAGE>

                                TABLE OF CONTENTS

<TABLE>
<CAPTION>
                                                                                                               Page
<S>              <C>                                                                                           <C>
ARTICLE I        DEFINITIONS AND INCORPORATION BY REFERENCE .................................................     1

   Section 1.01      Definitions ............................................................................     1
   Section 1.02      Other Definitions ......................................................................     7
   Section 1.03      Incorporation by Reference of Trust Indenture Act ......................................     7
   Section 1.04      Rules of Construction ..................................................................     8

ARTICLE II       THE SECURITIES .............................................................................     8

   Section 2.01      Amount Unlimited; Issuable in Series ...................................................     8
   Section 2.02      Denominations ..........................................................................    11
   Section 2.03      Forms Generally ........................................................................    11
   Section 2.04      Execution, Authentication, Delivery and Dating .........................................    12
   Section 2.05      Registrar and Paying Agent .............................................................    14
   Section 2.06      Paying Agent to Hold Money in Trust ....................................................    14
   Section 2.07      Holder Lists ...........................................................................    14
   Section 2.08      Transfer and Exchange ..................................................................    15
   Section 2.09      Replacement Securities .................................................................    15
   Section 2.10      Outstanding Securities .................................................................    16
   Section 2.11      Original Issue Discount, Foreign-Currency Denominated and Treasury Securities ..........    16
   Section 2.12      Temporary Securities ...................................................................    16
   Section 2.13      Cancellation ...........................................................................    17
   Section 2.14      Payments; Defaulted Interest ...........................................................    17
   Section 2.15      Persons Deemed Owners ..................................................................    17
   Section 2.16      Computation of Interest ................................................................    18
   Section 2.17      Global Securities; Book-Entry Provisions ...............................................    18
   Section 2.18      Form of Restricted Securities ..........................................................    20
   Section 2.19      Restrictive Legends for Restricted Securities ..........................................    21
   Section 2.20      Special Transfer Provisions of the Restricted Securities ...............................    24

ARTICLE III      REDEMPTION .................................................................................    27

   Section 3.01      Applicability of Article ...............................................................    27
   Section 3.02      Notice to the Trustee ..................................................................    27
   Section 3.03      Selection of Securities To Be Redeemed .................................................    28
   Section 3.04      Notice of Redemption ...................................................................    28
   Section 3.05      Effect of Notice of Redemption .........................................................    29
   Section 3.06      Deposit of Redemption Price ............................................................    29
   Section 3.07      Securities Redeemed or Purchased in Part ...............................................    30
   Section 3.08      Purchase of Securities .................................................................    30
   Section 3.09      Mandatory and Optional Sinking Funds ...................................................    30
   Section 3.10      Satisfaction of Sinking Fund Payments with Securities ..................................    30
   Section 3.11      Redemption of Securities for Sinking Fund ..............................................    31
</TABLE>

                                       -i-

<PAGE>

<TABLE>
<S>              <C>                                                                                           <C>
ARTICLE IV       COVENANTS ..................................................................................    31

   Section 4.01      Payment of Securities ..................................................................    31
   Section 4.02      Maintenance of Office or Agency ........................................................    32
   Section 4.03      SEC Reports; Financial Statements ......................................................    32
   Section 4.04      Compliance Certificate .................................................................    33
   Section 4.05      Existence ..............................................................................    33
   Section 4.06      Waiver of Stay, Extension or Usury Laws ................................................    33
   Section 4.07      Additional Amounts .....................................................................    34
   Section 4.08      Limitation on Liens ....................................................................    34
   Section 4.09      Limitation on Sale and Leaseback Transactions ..........................................    35

ARTICLE V        SUCCESSORS .................................................................................    36

   Section 5.01      Limitations on Mergers and Consolidations ..............................................    36
   Section 5.02      Successor Person Substituted ...........................................................    37

ARTICLE VI       DEFAULTS AND REMEDIES ......................................................................    37

   Section 6.01      Events of Default ......................................................................    37
   Section 6.02      Acceleration ...........................................................................    39
   Section 6.03      Other Remedies .........................................................................    40
   Section 6.04      Waiver of Defaults .....................................................................    40
   Section 6.05      Control by Majority ....................................................................    41
   Section 6.06      Limitations on Suits ...................................................................    41
   Section 6.07      Rights of Holders to Receive Payment ...................................................    41
   Section 6.08      Collection Suit by Trustee .............................................................    42
   Section 6.09      Trustee May File Proofs of Claim .......................................................    42
   Section 6.10      Priorities .............................................................................    43
   Section 6.11      Undertaking for Costs ..................................................................    43
   Section 6.12      Right to Pursue Remedy .................................................................    44

ARTICLE VII      TRUSTEE ....................................................................................    44

   Section 7.01      Duties of Trustee ......................................................................    44
   Section 7.02      Rights of Trustee ......................................................................    45
   Section 7.03      May Hold Securities ....................................................................    46
   Section 7.04      Trustee's Disclaimer ...................................................................    46
   Section 7.05      Notice of Defaults .....................................................................    46
   Section 7.06      Reports by Trustee to Holders ..........................................................    47
   Section 7.07      Compensation and Indemnity .............................................................    47
   Section 7.08      Replacement of Trustee .................................................................    48
   Section 7.09      Successor Trustee by Merger, etc. ......................................................    50
   Section 7.10      Eligibility; Disqualification ..........................................................    50
   Section 7.11      Preferential Collection of Claims Against Company ......................................    50

ARTICLE VIII     DISCHARGE OF INDENTURE .....................................................................    50

   Section 8.01      Termination of Company's Obligations ...................................................    50
   Section 8.02      Application of Trust Money .............................................................    54
   Section 8.03      Repayment to Company ...................................................................    54
   Section 8.04      Reinstatement ..........................................................................    55
</TABLE>

                                      -ii-

<PAGE>

<TABLE>
<S>               <C>                                                                                          <C>
ARTICLE IX        SUPPLEMENTAL INDENTURES AND AMENDMENTS ....................................................    55

   Section 9.01       Without Consent of Holders ............................................................    55
   Section 9.02       With Consent of Holders ...............................................................    56
   Section 9.03       Compliance with Trust Indenture Act ...................................................    58
   Section 9.04       Revocation and Effect of Consents .....................................................    58
   Section 9.05       Notation on or Exchange of Securities .................................................    59
   Section 9.06       Trustee to Sign Amendments, etc. ......................................................    59

ARTICLE X         MISCELLANEOUS .............................................................................    59

   Section 10.01      Trust Indenture Act Controls ..........................................................    59
   Section 10.02      Notices ...............................................................................    60
   Section 10.03      Communication by Holders with Other Holders ...........................................    61
   Section 10.04      Certificate and Opinion as to Conditions Precedent ....................................    61
   Section 10.05      Statements Required in Certificate or Opinion .........................................    61
   Section 10.06      Rules by Trustee and Agents ...........................................................    62
   Section 10.07      Legal Holidays ........................................................................    62
   Section 10.08      No Recourse Against Others ............................................................    62
   Section 10.09      Governing Law .........................................................................    62
   Section 10.10      No Adverse Interpretation of Other Agreements .........................................    62
   Section 10.11      Successors ............................................................................    62
   Section 10.12      Severability ..........................................................................    62
   Section 10.13      Counterpart Originals .................................................................    63
   Section 10.14      Table of Contents, Headings, etc. .....................................................    63
   Section 10.15      Jurisdiction; Waiver ..................................................................    63

ARTICLE XI        MEETINGS OF HOLDERS .......................................................................    63

   Section 11.01      Purposes for Which Meetings May Be Called .............................................    63
   Section 11.02      Call, Notice and Place of Meetings ....................................................    64
   Section 11.03      Persons Entitled to Vote at Meetings ..................................................    64
   Section 11.04      Quorum; Action ........................................................................    64
   Section 11.05      Determination of Voting Rights; Conduct and Adjournment of Meetings ...................    65
   Section 11.06      Counting Votes and Recording Action of Meetings .......................................    66
</TABLE>

                                      -iii-

<PAGE>

          INDENTURE dated as of June 9, 2003 between Schlumberger Limited
(Schlumberger N.V.), a Netherlands Antilles corporation established in Curacao
(the "Company"), and Citibank, N.A., a national banking association organized
under the laws of the United States of America, as trustee (the "Trustee").

          Each party agrees as follows for the benefit of the other party and
for the equal and ratable benefit of the Holders of the Company's unsecured
debentures, notes or other evidences of indebtedness (the "Securities") to be
issued from time to time in one or more series as provided in this Indenture:

                                   ARTICLE I

                   DEFINITIONS AND INCORPORATION BY REFERENCE

SECTION 1.01      Definitions.

          "Additional Amounts" means any additional amounts required by the
express terms of a Security or by or pursuant to a Board Resolution, under
circumstances specified therein or pursuant thereto, to be paid by the Company
with respect to certain taxes, assessments or other governmental charges imposed
on certain Holders and that are owing to such Holders.

          "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 purposes of this definition, "control"
of a Person shall mean 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" shall have meanings correlative to the foregoing.

          "Agent" means any Registrar or Paying Agent.

          "Attributable Debt" means, as to any particular lease under which any
Person is at the time liable, at any date as of which the amount thereof is to
be determined, the total net amount of rent (discounted from the respective due
dates thereof at the rate per annum set forth or implicit in the terms of such
lease compounded semi-annually) required to be paid by such Person under such
lease during the remaining term thereof. The net amount of rent required to be
paid under any such lease for any such period shall be the total amount of the
rent payable by the lessee with respect to such period, but may exclude amounts
required to be paid on account of maintenance and repairs, insurance, taxes,
assessments, water rates, utilities, operating and labor costs and similar
charges. In the case of any lease which is terminable by the lessee upon the
payment of a penalty, such net amount shall be the lesser of (i) the net amount
determined assuming termination on the date termination is permitted, including
the amount of such penalty, but no rent shall be considered as required to be
paid under such lease subsequent to the date upon which it may be so terminated,
and (ii) the net amount determined assuming no such termination.

          "Bankruptcy Law" means Title 11 of the United States Code or any
similar federal, state or foreign law for the relief of debtors.

                                      -1-

<PAGE>

          "Board of Directors" means the Board of Directors of the Company or
any committee thereof duly authorized, with respect to any particular matter, to
act by or on behalf of the Board of Directors of the Company.

          "Board Resolution" means a copy of a resolution 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, and delivered to the Trustee.

          "Business Day" means any day that is not a Legal Holiday.

          "Capital Lease Obligations" means any obligation under a lease that is
required to be capitalized for financial reporting purposes in accordance with
GAAP; and the amount of Indebtedness represented by such obligation shall be the
capitalized amount of such obligations determined in accordance with GAAP; and
the stated maturity thereof shall be the date of the last payment of rent or any
other amount due under such lease prior to the first date upon which such lease
may be terminated by the lessee without payment of a penalty.

          "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; provided, however, that for purposes
of any provision contained herein which is required by the TIA, "Company" shall
also mean each other obligor (if any) on the Securities of a series.

          "Company Order" and "Company Request" mean, respectively, a written
order or request signed in the name of the Company by two Officers of the
Company, and delivered to the Trustee.

          "Consolidated Net Assets" means the total amount of assets appearing
on the most recently prepared consolidated balance sheet of the Company and its
consolidated subsidiaries at the end of a fiscal quarter of the Company,
prepared in accordance with GAAP, after deducting therefrom (a) all current
liabilities (excluding notes and loans payable, the current portion of long-term
debt and capitalized lease obligations, any current liabilities which are by
their terms extendible or renewable at the option of the obligor thereon to a
time more than 12 months after the time as of which the amount thereof is being
computed) and (b) total prepaid expenses and deferred charges.

          "Corporate Trust Office" of the Trustee means the office of the
Trustee located at 111 Wall Street, 14th Floor, New York, New York 10005,
attention: Nancy Forte, and as may be located at such other address as the
Trustee may give notice to the Company.

          "Debt" means all notes, bonds, debentures or other similar evidences
of debt for money borrowed.

          "Default" means any event, act or condition that is, or after notice
or the passage of time or both would be, an Event of Default.

          "deliver" or "delivery" means, in the context of certificated
Securities, actual physical delivery of the certificate Securities to the
relevant Person required hereunder, together

                                      -2-

<PAGE>

with all endorsements, and in the context of Global Securities, the designation
on the records of the Depositary of a change in the interests of a holder in a
Debenture.

          "Depositary" means, with respect to the Securities of any series
issuable or issued in whole or in part in global form, the Person specified
pursuant to Section 2.01(3) hereof as the initial Depositary with respect to the
Securities of such series, until a successor shall have been appointed and
become such pursuant to the applicable provision of this Indenture, and
thereafter "Depositary" shall mean or include such successor.

          "Distribution Compliance Period" shall be determined in accordance
with Regulation S.

          "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 debt.

          "Exchange Act" means the Securities Exchange Act of 1934, as amended,
and any successor statute.

          "Funded Debt" means all Debt having a maturity of more than 12 months
from the date as of which the amount thereof is to be determined or having a
maturity of less than 12 months but by its terms being renewable or extendible
beyond 12 months from such date at the option of the obligor thereon.

          "GAAP" means generally accepted accounting principles in the United
States set forth in the opinions and pronouncements of the Accounting Principles
Board of the American Institute of Certified Public Accountants and statements
and pronouncements of the Financial Accounting Standards Board or in such other
statements by such other entity as may be approved by a significant segment of
the accounting profession of the United States, as in effect from time to time.

          "Global Security" means a Security that is issued in global form in
the name of the Depositary with respect thereto or its nominee.

          "Government Obligations" means, with respect to a series of
Securities, direct obligations of the government that issues the currency in
which the Securities of the series are payable for the payment of which the full
faith and credit of such government is pledged, or obligations of a Person
controlled or supervised by and acting as an agency or instrumentality of such
government, the payment of which is unconditionally guaranteed as a full faith
and credit obligation by such government.

          "Holder" means a Person in whose name a Security is registered.

          "Indebtedness" means (i) all obligations for borrowed money, (ii) all
obligations evidenced by debentures, notes or other similar instruments, (iii)
all obligations in respect of letters of credit or bankers acceptances or
similar instruments (or reimbursement obligations with respect thereto), (iv)
all obligations to pay the deferred purchase price of property or services,
except trade accounts payable arising in the ordinary course of business, (v)
Capital Lease Obligations and (vii) all Indebtedness of others guaranteed by the
Company or any of its

                                      -3-

<PAGE>

Significant Subsidiaries or for which the Company or any of its property, or
such Significant Subsidiary or any of its property, is legally responsible or
liable (whether by agreement to purchase indebtedness of, or to supply funds or
to invest in, others).

          "Indenture" means this Indenture as amended or supplemented from time
to time, and includes the terms of a particular series of Securities established
as contemplated by Section 2.01.

          "interest" means, with respect to an Original Issue Discount Security
that by its terms bears interest only after Maturity, interest payable after
Maturity.

          "Interest Payment Date," when used with respect to any Security, shall
have the meaning assigned to such term in the Security as contemplated by
Section 2.01.

          "Issue Date" means, with respect to Securities of a series, the date
on which the Securities of such series are originally issued under this
Indenture.

          "Legal Holiday" means a Saturday, a Sunday or a day on which banking
institutions in any of The City of New York, New York or a Place of Payment are
authorized or obligated by law, regulation or executive order to remain closed.

          "Maturity" means, with respect to any Security, the date on which the
principal of such Security or an installment of principal becomes due and
payable as therein or herein provided, whether at the Stated Maturity thereof,
or by declaration of acceleration, call for redemption or otherwise.

          "Mortgage" means any mortgage, pledge, lien, security interest,
conditional sale or other title retention agreement or other similar
encumbrance.

          "Non-U.S. Person" means any Person who is not a "U.S. person" as such
term is defined in Rule 902(k) of Regulation S under the Securities Act.

          "Officer" means the Chairman of the Board, the President, any Vice
Chairman of the Board, any Vice President, the Chief Financial Officer, Chief
Accounting Officer, the Treasurer, any Assistant Treasurer, the Controller, the
Secretary or any Assistant Secretary of a Person.

          "Officers' Certificate" means a certificate signed by two Officers of
a Person.

          "Opinion of Counsel" means a written opinion from legal counsel who is
acceptable to the Trustee. Such counsel may be an employee of or counsel to the
Company or the Trustee.

          "Original Issue Discount Security" means any Security that provides
for an amount less than the principal amount thereof to be due and payable upon
a declaration of acceleration of the Maturity thereof pursuant to Section 6.02.

                                      -4-

<PAGE>

          "Person" means any individual, corporation, partnership, limited
liability company, association, joint venture, trust, joint stock company or any
other entity or organization, including a government or political subdivision or
an agency or instrumentality thereof.

          "Place of Payment" means, with respect to the Securities of any
series, the place or places where the principal of, premium (if any) on and
interest on the Securities of that series are payable as specified in accordance
with Section 2.01 subject to the provisions of Section 4.02.

          "principal" of a Security means the principal of the Security plus,
when appropriate, the premium, if any, on the Security.

          "Private Placement Legend" means the legend initially set forth on the
Securities in the form set forth in Section 2.19.

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

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

          "Regulation S" means Regulation S under the Securities Act and any
successor rule or regulation.

          "Restricted Property" means any manufacturing plant or research
facility located in the United States, except any manufacturing plant or
research facility, or any portion thereof, which, in the opinion of the Board of
Directors, is not a principal plant or facility in relation to the activities of
the Company and its Restricted Subsidiaries as a whole.

          "Restricted Subsidiary" means any Subsidiary that owns a Restricted
Property if substantially all of the tangible property in which such Subsidiary
has an interest is located in the United States.

          "Restricted Securities" means Securities of a series designated
pursuant to Section 2.01 as subject to the provisions of Section 2.18, 2.19 and
2.20.

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

          "Rule 144A Securities" means Securities of a series designated
pursuant to Section 2.01 as entitled to the benefits of Section 4.03(b).

          "SEC" means the Securities and Exchange Commission.

          "Securities" has the meaning stated in the preamble of this Indenture
and more particularly means any Securities authenticated and delivered under
this Indenture.

                                      -5-

<PAGE>

         "Securities Act" means the Securities Act of 1933, as amended, and any
successor statute.

         "Security Custodian" means, with respect to Securities of a series, the
Trustee for Securities of such series, as custodian with respect to the
Securities of such series issued in global form, or any successor entity
thereto.

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

         "Significant Subsidiary" means any Subsidiary that would be a
"Significant Subsidiary" of the Company within the meaning of Rule 1-02 of
Regulation S-X under the Securities Act.

         "Subsidiary" means a corporation at least a majority 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
having voting power for the election of directors, whether at all times or only
so long as no senior class of stock has such voting power by reason of any
contingency.

         "surrender" shall have the same meaning as "deliver" in the context of
the surrender of a Debenture.

         "TIA" means the Trust Indenture Act of 1939, as amended (15 U.S.C.
(S)(S) 77aaa-77bbbb), as in effect on the date hereof.

         "Trust Officer" means any officer or assistant officer of the Trustee
assigned by the Trustee to administer its corporate trust matters.

         "Trustee" means the Person named as such above until a successor
replaces it in accordance with the applicable provisions of this Indenture, and
thereafter "Trustee" means each Person who is then a Trustee hereunder, and if
at any time there is more than one such Person, "Trustee" as used with respect
to the Securities of any series means the Trustee with respect to Securities of
that series.

         "United States" means the United States of America (including the
States and the District of Columbia) and its "possessions," which include Puerto
Rico, the U.S. Virgin Islands, Guam, American Samoa, Wake Island and the
Northern Mariana Islands.

         "U.S. Government Obligations" means Government Obligations with respect
to Securities payable in Dollars.

                                      -6-

<PAGE>

SECTION 1.02   Other Definitions.

                                                                       Defined
     Term                                                             in Section
    ------                                                            ----------
"Agent Member"......................................................    2.17
"Bankruptcy Custodian"..............................................    6.01
"Conversion Event"..................................................    6.01
"covenant defeasance"...............................................    8.01
"Event of Default"..................................................    6.01
"Exchange Rate".....................................................    2.11
"IAI"...............................................................    2.18
"IAI Certificate"...................................................    2.20
"Judgment Currency".................................................    6.10
"legal defeasance"..................................................    8.01
"mandatory sinking fund payment"....................................    3.09
"Net Proceeds"......................................................    4.09
"Offshore Certificate"..............................................    2.18
"Offshore Global Securities"........................................    2.18
"Offshore Physical Securities"......................................    2.18
"optional sinking fund payment".....................................    3.09
"Paying Agent"......................................................    2.05
"Permanent Offshore Global Securities"..............................    2.18
"Physical Securities"...............................................    2.18
"QIB"...............................................................    2.18
"Registrar".........................................................    2.05
"Regulation S Certificate"..........................................    2.20
"Regulation S Securities"...........................................    2.18
"Required Currency".................................................    6.10
"Sale and Leaseback Transaction"....................................    4.09
"Successor".........................................................    5.01
"Temporary Offshore Global Securities"..............................    2.18
"U.S. Global Securities"............................................    2.18
"U.S. Physical Securities"..........................................    2.18

SECTION 1.03   Incorporation by Reference of Trust Indenture Act.

         Whenever this Indenture refers to a provision of the TIA, the provision
is incorporated by reference in and made a part of this Indenture (and if the
Indenture is not qualified under the TIA at the time, as if it were so qualified
unless otherwise provided). The following TIA terms used in this Indenture have
the following meanings:

         "Commission" means the SEC.

         "indenture securities" means the Securities.

         "indenture security holder" means a Holder.

                                      -7-

<PAGE>

         "indenture to be qualified" means this Indenture.

         "indenture trustee" or "institutional trustee" means the Trustee.

         "obligor" on the indenture securities means the Company or any other
obligor on the Securities.

         All terms used in this Indenture that are defined by the TIA, defined
by a TIA reference to another statute or defined by an SEC rule under the TIA
have the meanings so assigned to them.

SECTION 1.04   Rules of Construction.

         Unless the context otherwise requires:

         (1) a term has the meaning assigned to it;

         (2) an accounting term not otherwise defined has the meaning assigned
             to it in accordance with GAAP;

         (3) "or" is not exclusive;

         (4) words in the singular include the plural, and in the plural include
             the singular;

         (5) provisions apply to successive events and transactions; and

         (6) all references in this instrument to Articles and Sections are
             references to the corresponding Articles and Sections in and of
             this instrument.

                                   ARTICLE II

                                 THE SECURITIES

SECTION 2.01   Amount Unlimited; Issuable in Series.

         The aggregate principal amount of Securities that may be authenticated
and delivered under this Indenture is unlimited.

         The Securities may be issued in one or more series. There shall be
established in or pursuant to a Board Resolution, and set forth, or determined
in the manner provided, in an Officers' Certificate or in a Company Order, or
established in one or more indentures supplemental hereto, prior to the issuance
of Securities of any series:

         (1) the title of the Securities of the series (which shall distinguish
      the Securities of the series from the Securities of all other series);

         (2) if there is to be a limit, the limit upon the aggregate principal
      amount of the Securities of the series that may be authenticated and
      delivered under this Indenture

                                      -8-

<PAGE>

          (except for Securities authenticated and delivered upon registration
          of transfer of, or in exchange for, or in lieu of, other Securities of
          the series pursuant to Section 2.08, 2.09, 2.12, 2.17, 3.07 or 9.05
          and except for any Securities that, pursuant to Section 2.04 or 2.17,
          are deemed never to have been authenticated and delivered hereunder);
          provided, however, that unless otherwise provided in the terms of the
          series, the authorized aggregate principal amount of such series may
          be increased before or after the issuance of any Securities of the
          series by a Board Resolution (or action pursuant to a Board
          Resolution) to such effect;

               (3) whether any Securities of the series are to be issuable
          initially in temporary global form and whether any Securities of the
          series are to be issuable in permanent global form, as Global
          Securities or otherwise, and, if so, whether beneficial owners of
          interests in any such Global Security may exchange such interests for
          Securities of such series and of like tenor of any authorized form and
          denomination and the circumstances under which any such exchanges may
          occur, if other than in the manner provided in Section 2.17, and the
          initial Depositary and Security Custodian, if any, for any Global
          Security or Securities of such series;

               (4) the manner in which any interest payable on a temporary
          Global Security on any Interest Payment Date will be paid if other
          than in the manner provided in Section 2.14;

               (5) the date or dates on which the principal of (and premium, if
          any, on) the Securities of the series is payable or the method of
          determination thereof;

               (6) the rate or rates, or the method of determination thereof, at
          which the Securities of the series shall bear interest, if any,
          whether and under what circumstances Additional Amounts with respect
          to such Securities shall be payable, the date or dates from which such
          interest shall accrue, the Interest Payment Dates on which such
          interest shall be payable and the record date for the interest payable
          on any Securities on any Interest Payment Date, or if other than
          provided herein, the Person to whom any interest on Securities of the
          series shall be payable;

               (7) the place or places where, subject to the provisions of
          Section 4.02, the principal, premium (if any), interest and any
          Additional Amounts with respect to the Securities of the series shall
          be payable;

               (8) the period or periods within which, the price or prices
          (whether denominated in cash, securities or otherwise) at which and
          the terms and conditions upon which Securities of the series may be
          redeemed, in whole or in part, at the option of the Company, if the
          Company is to have that option, and the manner in which the Company
          must exercise any such option, if different from those set forth
          herein;

               (9) the obligation, if any, of the Company to redeem, purchase or
          repay Securities of the series pursuant to any sinking fund or
          analogous provisions or at the option of a Holder thereof and the
          period or periods within which, the price or prices (whether
          denominated in cash, securities or otherwise) at which and the terms
          and

                                      -9-

<PAGE>

          conditions upon which Securities of the series shall be redeemed,
          purchased or repaid in whole or in part pursuant to such obligation;

               (10) if other than denominations of $1,000 and any integral
          multiple thereof, the denomination in which any Securities of that
          series shall be issuable;

               (11) if other than Dollars, the currency or currencies (including
          composite currencies) or the form, including equity securities, other
          debt securities (including Securities), warrants or any other
          securities or property of the Company or any other Person, in which
          payment of the principal, premium (if any), interest and any
          Additional Amounts with respect to the Securities of the series shall
          be payable;

               (12) if the principal of, premium (if any) or interest on or any
          Additional Amounts with respect to the Securities of the series are to
          be payable, at the election of the Company or a Holder thereof, in a
          currency or currencies (including composite currencies) other than
          that in which the Securities are stated to be payable, the currency or
          currencies (including composite currencies) in which payment of the
          principal, premium (if any), interest and any Additional Amounts with
          respect to Securities of such series as to which such election is made
          shall be payable, and the periods within which and the terms and
          conditions upon which such election is to be made;

               (13) if the amount of payments of principal, premium (if any),
          interest and any Additional Amounts with respect to the Securities of
          the series may be determined with reference to any commodities,
          currencies or indices, values, rates or prices or any other index or
          formula, the manner in which such amounts shall be determined;

               (14) if other than the entire principal amount thereof, the
          portion of the principal amount of Securities of the series that shall
          be payable upon declaration of acceleration of the Maturity thereof
          pursuant to Section 6.02;

               (15) any additional means of satisfaction and discharge of this
          Indenture and any additional conditions or limitations to discharge
          with respect to Securities of the series pursuant to Article VIII or
          any modifications of or deletions from such conditions or limitations;

               (16) any deletions or modifications of or additions to the Events
          of Default set forth in Section 6.01 or covenants of the Company set
          forth in Article IV pertaining to the Securities of the series;

               (17) any restrictions or other provisions with respect to the
          transfer or exchange of Securities of the series, which may amend,
          supplement, modify or supersede those contained in this Article II;

               (18) if the Securities of the series are to be convertible into
          or exchangeable for capital stock, other debt securities (including
          Securities), warrants, other equity securities or any other securities
          or property of the Company or any other Person, at the option of the
          Company or the Holder or upon the occurrence of any condition or
          event, the terms and conditions for such conversion or exchange;

                                      -10-

<PAGE>

          (19) whether the Securities of the series are to be entitled to the
     benefit of Section 4.03(b) and accordingly constitute Rule 144A Securities
     for the purposes of such Section;

          (20) whether the Securities of the series are to be subject to the
     provisions of Sections 2.18, 2.19 and 2.20, and if so, any deletions or
     modification of, or additions to, such Sections and the forms of the
     Offshore Certificate, the IAI Certificate and the Regulation S Certificate;
     and

          (21) any other terms of the series (which terms shall not be
     prohibited by the provisions of this Indenture).

          All Securities of any one series shall be substantially identical
except as to denomination and except as may otherwise be provided in or pursuant
to the Board Resolution referred to above and (subject to Section 2.03) set
forth, or determined in the manner provided, in the Officers' Certificate or
Company Order referred to above or in any such indenture supplemental hereto.

          If any of the terms of the series are established by action taken
pursuant to a Board Resolution, a copy of an appropriate record of such action,
together with such Board Resolution, shall be set forth in an Officers'
Certificate or certified by the Secretary or an Assistant Secretary of the
Company and delivered to the Trustee at or prior to the delivery of the
Officers' Certificate or Company Order setting forth the terms of the series.

SECTION 2.02    Denominations.

          The Securities of each series shall be issuable in such denominations
as shall be specified as contemplated by Section 2.01. In the absence of any
such provisions with respect to the Securities of any series, the Securities of
such series denominated in Dollars shall be issuable in denominations of $1,000
and any integral multiples thereof.

SECTION 2.03    Forms Generally.

          The Securities of each series shall be in fully registered form and in
substantially such form or forms (including temporary or permanent global form)
established by or pursuant to a Board Resolution or in one or more indentures
supplemental hereto. The Securities may have notations, legends or endorsements
required by law, securities exchange rule, the Company's articles of
incorporation, bylaws or other similar governing documents, agreements to which
the Company is subject, if any, or usage (provided that any such notation,
legend or endorsement is in a form acceptable to the Company). A copy of the
Board Resolution establishing the form or forms of Securities of any series
shall be delivered to the Trustee at or prior to the delivery of the Company
Order contemplated by Section 2.04 for the authentication and delivery of such
Securities.

          The definitive Securities of each series shall be printed,
lithographed or engraved on steel engraved borders or may be produced in any
other manner, all as determined by the Officers executing such Securities, as
evidenced by their execution thereof.

                                      -11-

<PAGE>

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

          "This is one of the Securities of the series designated therein
     referred to in the within-mentioned Indenture.

                                       CITIBANK, N.A., as Trustee

                                       By: _____________________________________
                                                   Authorized Officer".

SECTION 2.04    Execution, Authentication, Delivery and Dating.

          Two Officers of the Company shall sign the Securities on behalf of the
Company by manual or facsimile signature. The Company's seal, if any, shall be
impressed, affixed, imprinted or reproduced on the Securities and may be in
facsimile form.

          If an Officer of the Company whose signature is on a Security no
longer holds that office at the time the Security is authenticated, the Security
shall be valid nevertheless.

          A Security shall not be entitled to any benefit under this Indenture
or be valid or obligatory for any purpose until authenticated by the manual
signature of an authorized signatory of the Trustee, which signature shall be
conclusive evidence that the Security has been authenticated under this
Indenture. Notwithstanding the foregoing, if any Security has been authenticated
and delivered hereunder but never issued and sold by the Company, and the
Company delivers such Security to the Trustee for cancellation as provided in
Section 2.13, together with a written statement from an Officer of the Company
(which need not comply with Section 10.05 and need not be accompanied by an
Opinion of Counsel) stating that such Security has never been issued and sold by
the Company, for all purposes of this Indenture such Security shall be deemed
never to have been authenticated and delivered hereunder and shall never be
entitled to the benefits of this Indenture.

          At any time and from time to time after the execution and delivery of
this Indenture, the Company may deliver Securities of any series executed by the
Company to the Trustee for authentication, and the Trustee shall authenticate
and deliver such Securities for original issue upon a Company Order for the
authentication and delivery of such Securities or pursuant to such procedures
acceptable to the Trustee as may be specified from time to time by Company
Order. Such order shall specify the amount of the Securities to be
authenticated, the date on which the original issue of Securities is to be
authenticated, the name or names of the initial Holder or Holders and any other
terms of the Securities of such series not otherwise determined. If provided for
in such procedures, such Company Order may authorize (1) authentication and
delivery of Securities of such series for original issue from time to time, with
certain terms (including, without limitation, the Maturity dates or dates,
original issue date or dates and interest rate or rates) that differ from
Security to Security and (2) if acceptable to the Trustee, may authorize
authentication and delivery pursuant to oral or electronic instructions from the
Company or its duly authorized agent, which instructions shall be promptly
confirmed in writing.

                                      -12-

<PAGE>

          If the form or terms of the Securities of the series have been
established in or pursuant to one or more Board Resolutions as permitted by
Section 2.01, in authenticating such Securities, and accepting the additional
responsibilities under this Indenture in relation to such Securities, the
Trustee shall be entitled to receive (in addition to the Company Order referred
to above and the other documents required by Section 10.04), and (subject to
Section 7.01) shall be fully protected in relying upon,

          (a) an Officers' Certificate setting forth the Board Resolution and,
     if applicable, an appropriate record of any action taken pursuant thereto,
     as contemplated by the last paragraph of Section 2.01; or

          (b) an Opinion of Counsel to the effect that:

              (i) the form of such Securities has been established in conformity
          with the provisions of this Indenture;

              (ii) the terms of such Securities have been established in
          conformity with the provisions of this Indenture; and

              (iii) that such Securities, when authenticated and delivered by
          the Trustee and issued by the Company in the manner and subject to any
          conditions specified in such Opinion of Counsel, will constitute valid
          and binding obligations of the Company, enforceable against the
          Company in accordance with their terms, except as the enforceability
          thereof may be limited by applicable bankruptcy, insolvency,
          reorganization, moratorium, fraudulent conveyance or other similar
          laws in effect from time to time affecting the rights of creditors
          generally, and the application of general principles of equity
          (regardless of whether such enforceability is considered in a
          proceeding in equity or at law).

          If all the Securities of any series are not to be issued at one time,
it shall not be necessary to deliver an Officers' Certificate and Opinion of
Counsel at the time of issuance of each such Security, but such Officers'
Certificate and Opinion of Counsel shall be delivered at or before the time of
issuance of the first Security of the series to be issued.

          The Trustee shall not be required to authenticate such Securities if
the issuance of such Securities pursuant to this Indenture would affect the
Trustee's own rights, duties or immunities under the Securities and this
Indenture or otherwise in a manner not reasonably acceptable to the Trustee.

          The Trustee may appoint an authenticating agent reasonably acceptable
to the Company to authenticate Securities. Unless limited by the terms of such
appointment, an authenticating agent may authenticate Securities whenever the
Trustee may do so. Each reference in this Indenture to authentication by the
Trustee includes authentication by such agent. An authenticating agent has the
same rights as an Agent to deal with the Company or an Affiliate of the Company.

          Each Security shall be dated the date of its authentication.

                                      -13-

<PAGE>

SECTION 2.05    Registrar and Paying Agent.

          The Company shall maintain an office or agency for each series of
Securities where Securities of such series may be presented for registration of
transfer or exchange ("Registrar") and an office or agency where Securities of
such series may be presented for payment ("Paying Agent"). The Registrar shall
keep a register of the Securities of such series and of their transfer and
exchange. The Company may appoint one or more co-registrars and one or more
additional paying agents. The term "Registrar" includes any co-registrar and the
term "Paying Agent" includes any additional paying agent.

          The Company shall enter into an appropriate agency agreement with any
Registrar or Paying Agent not a party to this Indenture. The agreement shall
implement the provisions of this Indenture that relate to such Agent. The
Company shall notify the Trustee of the name and address of any Agent not a
party to this Indenture. The Company may change any Paying Agent or Registrar
without notice to any Holder. If the Company fails to appoint or maintain
another entity as Registrar or Paying Agent, the Trustee shall act as such. The
Company or any of its Subsidiaries may act as Paying Agent or Registrar.

          The Company initially appoints the Trustee as Registrar and Paying
Agent.

SECTION 2.06    Paying Agent to Hold Money in Trust.

          The Company shall require each Paying Agent other than the Trustee to
agree in writing that the Paying Agent will hold in trust for the benefit of
Holders or the Trustee all money held by the Paying Agent for the payment of
principal of, premium, if any, or interest on or any Additional Amounts with
respect to Securities and will notify the Trustee of any default by the Company
in making any such payment. While any such default continues, the Trustee may
require a Paying Agent to pay all money held by it to the Trustee and to account
for any funds disbursed. The Company at any time may require a Paying Agent to
pay all money held by it to the Trustee and to account for any funds disbursed.
Upon payment over to the Trustee and upon accounting for any funds disbursed,
the Paying Agent (if other than the Company or a Subsidiary of the Company)
shall have no further liability for the money. If the Company or a Subsidiary of
the Company acts as Paying Agent, it shall segregate and hold in a separate
trust fund for the benefit of the Holders all money held by it as Paying Agent.
Each Paying Agent shall otherwise comply with TIA (S) 317(b).

SECTION 2.07    Holder Lists.

          The Trustee shall preserve in as current a form as is reasonably
practicable the most recent list available to it of the names and addresses of
Holders and shall otherwise comply with TIA (S) 312(a). If the Trustee is not
the Registrar with respect to a series of Securities, the Company shall furnish
to the Trustee at least five Business Days before each Interest Payment Date
with respect to such series of Securities, and at such other times as the
Trustee may request in writing, a list in such form and as of such date as the
Trustee may reasonably require of the names and addresses of Holders of such
series, and the Company shall otherwise comply with TIA (S) 312(a).

                                      -14-

<PAGE>

SECTION 2.08    Transfer and Exchange.

          Except as set forth in Section 2.17 or as may be provided pursuant to
Section 2.01:

          When Securities of any series are presented to the Registrar with the
request to register the transfer of such Securities or to exchange such
Securities for an equal principal amount of Securities of the same series of
like tenor and of other authorized denominations, the Registrar shall register
the transfer or make the exchange as requested if its requirements and the
requirements of this Indenture for such transactions are met; provided, however,
that the Securities presented or surrendered for registration of transfer or
exchange shall be duly endorsed or accompanied by a written instruction of
transfer in form reasonably satisfactory to the Registrar duly executed by the
Holder thereof or by his attorney, duly authorized in writing, on which
instruction the Registrar can rely.

          To permit registrations of transfers and exchanges, the Company shall
execute and the Trustee shall authenticate Securities at the Registrar's written
request and submission of the Securities. No service charge shall be made to a
Holder for any registration of transfer or exchange (except as otherwise
expressly permitted herein), but the Company may require payment of a sum
sufficient to cover any transfer tax or similar governmental charge payable in
connection therewith (other than such transfer tax or similar governmental
charge payable upon exchanges pursuant to Section 2.12, 3.07 or 9.05). The
Trustee shall authenticate Securities in accordance with the provisions of
Section 2.04. Notwithstanding any other provisions of this Indenture to the
contrary, the Company shall not be required to register the transfer or exchange
of (a) any Security selected for redemption in whole or in part pursuant to
Article III, except the unredeemed portion of any Security being redeemed in
part, or (b) any Security during the period beginning 15 Business Days before
the mailing of notice of any offer to repurchase Securities of the series
required pursuant to the terms thereof or of redemption of Securities of a
series to be redeemed and ending at the close of business on the date of
mailing.

SECTION 2.09    Replacement Securities.

          If any mutilated Security is surrendered to the Trustee, or if the
Holder of a Security claims that the Security has been destroyed, lost or stolen
and the Company and the Trustee receive evidence to their satisfaction of the
destruction, loss or theft of such Security, the Company shall issue and the
Trustee shall authenticate a replacement Security of the same series if the
Trustee's requirements are met. If any such mutilated, destroyed, lost or stolen
Security has become or is about to become due and payable, the Company in its
discretion may, instead of issuing a new Security, pay such Security. If
required by the Trustee or the Company, such Holder must furnish an indemnity
bond that is sufficient in the judgment of the Trustee and the Company to
protect the Company, the Trustee, any Agent or any authenticating agent from any
loss that any of them may suffer if a Security is replaced. The Company and the
Trustee may charge a Holder for their expenses in replacing a Security.

          Every replacement Security is an additional obligation of the Company.

                                      -15-

<PAGE>

SECTION 2.10    Outstanding Securities.

          The Securities outstanding at any time are all the Securities
authenticated by the Trustee except for those canceled by it, those delivered to
it for cancellation, those reductions in the interest in a Global Security
effected by the Trustee hereunder and those described in this Section 2.10 as
not outstanding.

          If a Security is replaced pursuant to Section 2.09, it ceases to be
outstanding unless the Trustee receives proof satisfactory to it that the
replaced Security is held by a bona fide purchaser.

          If the principal amount of any Security is considered paid under
Section 4.01, it ceases to be outstanding and interest on it ceases to accrue.

          A Security does not cease to be outstanding because the Company or an
Affiliate of the Company holds the Security.

SECTION 2.11    Original Issue Discount, Foreign-Currency Denominated and
                Treasury Securities.

          In determining whether the Holders of the required principal amount of
Securities have concurred in any direction, amendment, supplement, waiver or
consent, (a) the principal amount of an Original Issue Discount Security shall
be the principal amount thereof that would be due and payable as of the date of
such determination upon acceleration of the Maturity thereof pursuant to Section
6.02, (b) the principal amount of a Security denominated in a foreign currency
shall be the Dollar equivalent, as determined by the Company by reference to the
noon buying rate in The City of New York, New York for cable transfers for such
currency, as such rate is certified for customs purposes by the Federal Reserve
Bank of New York (the "Exchange Rate") on the date of original issuance of such
Security, of the principal amount (or, in the case of an Original Issue Discount
Security, the Dollar equivalent, as determined by the Company by reference to
the Exchange Rate on the date of original issuance of such Security, of the
amount determined as provided in (a) above), of such Security and (c) Securities
owned by the Company or any other obligor upon the Securities or any Affiliate
of the Company or of such other obligor shall be disregarded, except that, for
the purpose of determining whether the Trustee shall be protected in relying
upon any such direction, amendment, supplement, waiver or consent, only
Securities that the Trustee actually knows are so owned shall be so disregarded.

SECTION 2.12    Temporary Securities.

          Until definitive Securities of any series are ready for delivery, the
Company may prepare and the Trustee shall authenticate temporary Securities.
Temporary Securities shall be substantially in the form of definitive
Securities, but may have variations that the Company considers appropriate for
temporary Securities. Without unreasonable delay, the Company shall prepare and
the Trustee shall authenticate definitive Securities in exchange for temporary
Securities. Until so exchanged, the temporary Securities shall in all respects
be entitled to the same benefits under this Indenture as definitive Securities.

                                      -16-

<PAGE>

SECTION 2.13    Cancellation.

          The Company at any time may deliver Securities to the Trustee for
cancellation. The Registrar and the Paying Agent shall forward to the Trustee
any Securities surrendered to them for registration of transfer, exchange,
payment or redemption or for credit against any sinking fund payment. The
Trustee shall cancel all Securities properly surrendered for registration of
transfer, exchange, payment, redemption, replacement or cancellation or for
credit against any sinking fund. Unless the Company shall direct in writing that
canceled Securities be returned to it, all canceled Securities held by the
Trustee shall be disposed of in accordance with the usual disposal procedures of
the Trustee, and the Trustee shall maintain a record of their disposal. The
Company may not issue new Securities to replace Securities that have been paid
or that have been delivered to the Trustee for cancellation.

SECTION 2.14    Payments; Defaulted Interest.

          Unless otherwise provided as contemplated by Section 2.01, interest
(except defaulted interest) on any Security that is payable, and is punctually
paid or duly provided for, on any Interest Payment Date shall be paid to the
Persons who are registered Holders of that Security at the close of business on
the record date next preceding such Interest Payment Date, even if such
Securities are canceled after such record date and on or before such Interest
Payment Date. If certificated, the Holder must surrender the Security to a
Paying Agent to collect principal payments. Unless otherwise provided with
respect to the Securities of any series, the Company will pay the principal of,
premium (if any) and interest on and any Additional Amounts with respect to the
Securities in Dollars. Such amounts shall be payable at the offices of the
Trustee, provided that at the option of the Company, the Company may pay such
amounts (1) by wire transfer with respect to Global Securities or (2) by check
payable in such money mailed to a Holder's registered address with respect to
any Securities. The Trustee shall not be bound to make payment until it is
satisfied that full payment has been received from the Company.

          If the Company defaults in a payment of interest on the Securities, it
shall pay the defaulted interest in any lawful manner plus, to the extent
lawful, interest on the defaulted interest, in each case at the rate provided in
the Securities and in Section 4.01. The Company may pay the defaulted interest
to the Persons who are Holders on a subsequent special record date. At least 15
days before any special record date selected by the Company, the Company (or the
Trustee, in the name of and at the expense of the Company upon 20 days' prior
written notice from the Company setting forth such special record date and the
interest amount to be paid) shall mail to Holders a notice that states the
special record date, the related payment date and the amount of such interest to
be paid.

SECTION 2.15    Persons Deemed Owners.

          The Company, the Trustee, any Agent and any authenticating agent may
treat the Person in whose name any Security is registered as the owner of such
Security for the purpose of receiving payments of principal of, premium (if any)
or interest on or any Additional Amounts with respect to such Security and for
all other purposes. None of the Company, the Trustee, any Agent or any
authenticating agent shall be affected by any notice to the contrary.

                                      -17-

<PAGE>

SECTION 2.16    Computation of Interest.

          Except as otherwise specified as contemplated by Section 2.01 for
Securities of any series, interest on the Securities of each series shall be
computed on the basis of a year comprising twelve 30-day months.

SECTION 2.17    Global Securities; Book-Entry Provisions.

          If Securities of a series are issuable in global form as a Global
Security, as contemplated by Section 2.01, then, notwithstanding clause (10) of
Section 2.01 and the provisions of Section 2.02, any such Global Security shall
represent such of the outstanding Securities of such series as shall be
specified therein and may provide that it shall represent the aggregate amount
of outstanding Securities from time to time endorsed thereon and that the
aggregate amount of outstanding Securities represented thereby may from time to
time be reduced or increased, as appropriate, to reflect exchanges or
redemptions. Any endorsement of a Global Security to reflect the amount, or any
increase or decrease in the amount, of outstanding Securities represented
thereby shall be made by the Trustee (i) in such manner and upon instructions
given by such Person or Persons as shall be specified in such Security or in a
Company Order to be delivered to the Trustee pursuant to Section 2.04 or (ii)
otherwise in accordance with written instructions or such other written form of
instructions as is customary for the Depositary for such Security, from such
Depositary or its nominee on behalf of any Person having a beneficial interest
in such Global Security. Subject to the provisions of Section 2.04 and, if
applicable, Section 2.12, the Trustee shall deliver and redeliver any Security
in permanent global form in the manner and upon instructions given by the Person
or Persons specified in such Security or in the applicable Company Order. With
respect to the Securities of any series that are represented by a Global
Security, the Company authorizes the execution and delivery by the Trustee of a
letter of representations or other similar agreement or instrument in the form
customarily provided for by the Depositary appointed with respect to such Global
Security. Any Global Security may be deposited with the Depositary or its
nominee, or may remain in the custody of the Trustee or the Security Custodian
therefor pursuant to a FAST Balance Certificate Agreement or similar agreement
between the Trustee and the Depositary. If a Company Order has been, or
simultaneously is, delivered, any instructions by the Company with respect to
endorsement or delivery or redelivery of a Security in global form shall be in
writing but need not comply with Section 10.05 and need not be accompanied by an
Opinion of Counsel.

          Members of, or participants in, the Depositary ("Agent Members") shall
have no rights under this Indenture with respect to any Global Security held on
their behalf by the Depositary, or the Trustee or the Security Custodian as its
custodian, or under such Global Security and the Depositary may be treated by
the Company, the Trustee or the Security Custodian and any agent of the Company,
the Trustee or the Security Custodian as the absolute owner of such Global
Security for all purposes whatsoever. Notwithstanding the foregoing, (i) the
registered holder of a Global Security may grant proxies and otherwise authorize
any Person, including Agent Members and Persons that may hold interests through
Agent Members, to take any action that a Holder is entitled to take under this
Indenture or the Securities and (ii) nothing herein shall prevent the Company,
the Trustee or the Security Custodian, or any agent of the Company, the Trustee
or the Security Custodian, from giving effect to any written certification,

                                      -18-

<PAGE>

proxy or other authorization furnished by the Depositary or shall impair, as
between the Depositary and its Agent Members, the operation of customary
practices governing the exercise of the rights of a beneficial owner of any
Security.

          Notwithstanding Section 2.08, and except as otherwise provided
pursuant to Section 2.01: Transfers of a Global Security shall be limited to
transfers of such Global Security in whole, but not in part, to the Depositary,
its successors or their respective nominees. Interests of beneficial owners in a
Global Security may be transferred in accordance with the rules and procedures
of the Depositary. Securities shall be transferred to all beneficial owners in
exchange for their beneficial interests in a Global Security if, and only if,
either (1) the Depositary notifies the Company that it is unwilling or unable to
continue as Depositary for the Global Security and a successor Depositary is not
appointed by the Company within 90 days of such notice, (2) an Event of Default
has occurred with respect to such series and is continuing and the Registrar has
received a request from the Depositary to issue Securities in lieu of all or a
portion of the Global Security (in which case the Company shall deliver
Securities within 30 days of such request) or (3) the Company determines not to
have the Securities represented by a Global Security.

          In connection with any transfer of a portion of the beneficial
interest in a Global Security to beneficial owners pursuant to this Section
2.17, the Registrar shall reflect on its books and records the date and a
decrease in the principal amount of the Global Security in an amount equal to
the principal amount of the beneficial interest in the Global Security to be
transferred, and the Company shall execute, and the Trustee upon receipt of a
Company Order for the authentication and delivery of Securities shall
authenticate and deliver, one or more Securities of the same series of like
tenor and amount.

          In connection with the transfer of all the beneficial interest in a
Global Security to beneficial owners pursuant to this Section 2.17, the Global
Security shall be deemed to be surrendered to the Trustee for cancellation, and
the Company shall execute, and the Trustee shall, upon receipt of a Company
Order, authenticate and deliver, to each beneficial owner identified by the
Depositary in exchange for its beneficial interest in the Global Security, an
equal aggregate principal amount of Securities of authorized denominations.

          Neither the Company nor the Trustee will have any responsibility or
liability for any aspect of the records relating to, or payments made on account
of, Securities by the Depositary, or for maintaining, supervising or reviewing
any records of the Depositary relating to such Securities. Neither the Company
nor the Trustee shall be liable for any delay by the related Global Security
Holder or the Depositary in identifying the beneficial owners, and each such
Person may conclusively rely on, and shall be protected in relying on,
instructions from such Global Security Holder or the Depositary for all purposes
(including with respect to the registration and delivery, and the respective
principal amounts, of the Securities to be issued).

          The provisions of the last sentence of the third paragraph of Section
2.04 shall apply to any Global Security if such Global Security was never issued
and sold by the Company and the Company delivers to the Trustee the Global
Security together with written instructions (which need not comply with Section
10.05 and need not be accompanied by an Opinion of Counsel) with regard to the
cancellation or reduction in the principal amount of Securities

                                      -19-

<PAGE>

represented thereby, together with the written statement contemplated by the
last sentence of the third paragraph of Section 2.04.

          Notwithstanding the provisions of Sections 2.03 and 2.17, unless
otherwise specified as contemplated by Section 2.01, payment of principal of,
premium (if any) and interest on and any Additional Amounts with respect to any
Global Security shall be made to the Depositary.

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

          Notwithstanding anything herein to the contrary, delivery or surrender
of a Security shall not be required in the case of Global Securities in order to
obtain the rights or benefits provided hereunder upon the delivery or surrender
of a Security.

SECTION 2.18    Form of Restricted Securities.

          Unless otherwise provided in an Officers' Certificate or in a Company
Order establishing the terms of the Securities pursuant to Section 2.01, or
established in one or more indentures supplemental hereto, Restricted Securities
may be resold initially only (A) to "qualified institutional buyers", as defined
in Rule 144A ("QIBs"), (B) to a limited number of other institutional
"accredited investors", as defined in Rule 501(a)(1), (2), (3) and (7) of
Regulation D under the Securities Act ("IAIs") and (C) in offshore transactions
to Non-U.S. Persons in reliance on Regulation S under the Securities Act. Such
Securities may thereafter be transferred to, among others, QIBs pursuant to Rule
144A, Non-U.S. Persons in reliance on Regulation S and pursuant to other
exemptions from, or in transactions not subject to, the registration
requirements of the Securities Act, including sales to IAIs that are not QIBs,
in accordance with the procedure described herein.

          Each Rule 144A Security offered and sold to QIBs will be issued on the
Issue Date in the form of a permanent Global Security, without interest coupons,
substantially in the form specified pursuant to Section 2.01, including
appropriate legends as set forth in Section 2.19(a) and (c) (the "U.S. Global
Securities"), registered in the name of the nominee of the Depositary, deposited
with the Trustee, as custodian for the Depositary, duly executed by the Company
and authenticated by the Trustee as hereinafter provided. The U.S. Global
Securities may be represented by more than one certificate, if so required by
the Depositary's rules regarding the maximum principal amount to be represented
by a single certificate. The aggregate principal amount of the U.S. Global
Securities may from time to time be increased or decreased by adjustments made
on the records of the Trustee, as custodian for the Depositary or its nominee,
as hereinafter provided.

                                      -20-

<PAGE>

         Each series of Securities offered and sold in offshore transactions in
reliance on Regulation S ("Regulation S Securities") shall be issued initially
in the form of one or more temporary Global Securities in registered form,
without interest coupons, substantially in the form specified pursuant to
Section 2.01, including appropriate legends as set forth in Section 2.19(b) and
(c) (the "Temporary Offshore Global Securities"), registered in the name of the
nominee of the Depositary, deposited with the Trustee, as custodian for the
Depositary, duly executed by the Company and authenticated by the Trustee as
hereinafter provided. The aggregate principal amount of the Offshore Global
Securities (as defined below) may from time to time be increased or decreased by
adjustments made on the records of the Trustee, as custodian for the Depositary
or its nominee, as hereinafter provided. At any time after the termination of
the Distribution Compliance Period, upon receipt by the Trustee and the Company
of a certificate (the "Offshore Certificate") substantially in the form
specified pursuant to Section 2.01, one or more permanent Global Securities in
registered form substantially in the form specified pursuant to Section 2.01,
including appropriate legends as set forth in Section 2.19(c) (the "Permanent
Offshore Global Securities"; and together with the Temporary Offshore Global
Securities, the "Offshore Global Securities") duly executed by the Company and
authenticated by the Trustee as hereinafter provided shall be deposited with the
Trustee, as custodian for the Depositary or its nominee, and the Registrar shall
reflect on its books and records the date and a decrease in the principal amount
of the applicable Temporary Offshore Global Security in an amount equal to the
principal amount of the beneficial interest in the applicable Temporary Offshore
Global Security transferred in exchange for a beneficial interest in the
applicable Permanent Offshore Global Security and a corresponding increase in
the principal amount of the corresponding Permanent Offshore Global Security.

         Securities offered and sold to IAIs and Securities issued pursuant to
Section 2.17 in exchange for interests in the U.S. Global Securities shall be
issued in the form of permanent certificated Securities in registered form,
without interest coupons, in substantially the form specified pursuant to
Section 2.01, including appropriate legends as set forth in Section 2.19(a) (the
"U.S. Physical Securities").

         Securities issued pursuant to Section 2.17 in exchange for interests in
the Permanent Offshore Global Securities shall be in the form of permanent
certificated Securities in registered form substantially in the form specified
pursuant to Section 2.01 (the "Offshore Physical Securities").

         The Offshore Physical Securities and U.S. Physical Securities are
sometimes collectively herein referred to as the "Physical Securities."

SECTION 2.19   Restrictive Legends for Restricted Securities.

         Unless otherwise provided in an Officers' Certificate or in a Company
Order establishing the terms of the Securities pursuant to Section 2.01, or
established in one or more indentures supplemental hereto, and unless and until
a Restricted Security is sold in connection with an effective registration
statement under the Securities Act or the Company determines to eliminate the
use of any or all of the legends provided below, (A) the U.S. Global Securities
shall bear the legends set forth in subparagraphs (a) and (c) below on the face
thereof, (B) the U.S. Physical Securities shall bear the applicable legend set
forth in subparagraph (a) below on the

                                      -21-

<PAGE>

face thereof, and (C) the Temporary Offshore Global Security shall bear the
legends set forth in subparagraphs (b) and (c) below on the face thereof.

         (a) THIS SECURITY HAS NOT BEEN REGISTERED UNDER THE U.S. SECURITIES ACT
OF 1933, AS AMENDED (THE "SECURITIES ACT"), OR ANY STATE SECURITIES LAWS, AND,
ACCORDINGLY, MAY NOT BE OFFERED OR SOLD WITHIN THE UNITED STATES OR TO, OR FOR
THE ACCOUNT OR BENEFIT OF, U.S. PERSONS EXCEPT AS SET FORTH IN THE FOLLOWING
SENTENCE. BY ITS ACQUISITION HEREOF, THE HOLDER (1) REPRESENTS THAT (A) IT IS A
"QUALIFIED INSTITUTIONAL BUYER" (AS DEFINED IN RULE 144A UNDER THE SECURITIES
ACT), (B) IT IS AN INSTITUTIONAL "ACCREDITED INVESTOR" (AS DEFINED IN RULE
501(a)(1), (2), (3) OR (7) UNDER THE SECURITIES ACT) ("INSTITUTIONAL ACCREDITED
INVESTOR") OR (C) IT IS NOT A U.S. PERSON AND IS ACQUIRING THIS SECURITY IN AN
OFFSHORE TRANSACTION IN COMPLIANCE WITH REGULATION S UNDER THE SECURITIES ACT;
(2) AGREES THAT IT WILL NOT, PRIOR TO EXPIRATION OF THE HOLDING PERIOD
APPLICABLE TO SALES OF THIS SECURITY UNDER RULE 144(k) UNDER THE SECURITIES ACT
(OR ANY SUCCESSOR PROVISION), RESELL OR OTHERWISE TRANSFER THIS SECURITY EXCEPT
(A) TO THE COMPANY OR ONE OF ITS SUBSIDIARIES, (B) TO A QUALIFIED INSTITUTIONAL
BUYER IN COMPLIANCE WITH RULE 144A UNDER THE SECURITIES ACT, (C) INSIDE THE
UNITED STATES TO AN INSTITUTIONAL ACCREDITED INVESTOR THAT, PRIOR TO SUCH
TRANSFER, FURNISHES TO THE TRUSTEE A SIGNED LETTER CONTAINING CERTAIN
REPRESENTATIONS AND AGREEMENTS RELATING TO THE RESTRICTIONS ON TRANSFER OF THIS
SECURITY (THE FORM OF WHICH LETTER CAN BE OBTAINED FROM THE TRUSTEE), (D)
PURSUANT TO THE EXEMPTION FROM REGISTRATION PROVIDED BY RULE 144 UNDER THE
SECURITIES ACT (IF AVAILABLE), (E) PURSUANT TO A REGISTRATION STATEMENT WHICH
HAS BEEN DECLARED EFFECTIVE UNDER THE SECURITIES ACT (AND WHICH CONTINUES TO BE
EFFECTIVE AT THE TIME OF SUCH TRANSFER) OR (F) OUTSIDE THE UNITED STATES IN
COMPLIANCE WITH RULE 904 UNDER THE SECURITIES ACT AND (3) AGREES THAT IT WILL
DELIVER TO EACH PERSON TO WHOM THIS SECURITY IS TRANSFERRED A NOTICE
SUBSTANTIALLY TO THE EFFECT OF THIS LEGEND. IN CONNECTION WITH ANY TRANSFER OF
THIS SECURITY PRIOR TO THE EXPIRATION OF THE HOLDING PERIOD APPLICABLE TO SALES
OF THIS SECURITY UNDER RULE 144(k) UNDER THE SECURITIES ACT (OR ANY SUCCESSOR
PROVISION), THE HOLDER MUST CHECK THE APPROPRIATE BOX SET FORTH ON THE REVERSE
HEREOF RELATING TO THE MANNER OF SUCH TRANSFER AND SUBMIT THIS CERTIFICATE TO
THE TRUSTEE. IF THE PROPOSED TRANSFEREE IS AN INSTITUTIONAL ACCREDITED INVESTOR
OR IS A PURCHASER WHO IS NOT A U.S. PERSON, THE HOLDER MUST, PRIOR TO SUCH
TRANSFER, FURNISH TO THE TRUSTEE SUCH CERTIFICATIONS, LEGAL OPINIONS OR OTHER
INFORMATION AS IT 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. THIS LEGEND WILL BE REMOVED
UPON THE EARLIER OF THE TRANSFER OF THIS SECURITY PURSUANT TO CLAUSE 2(E) ABOVE
OR UPON ANY TRANSFER OF THIS SECURITY UNDER RULE 144(k)

                                      -22-

<PAGE>

UNDER THE SECURITIES ACT (OR ANY SUCCESSOR PROVISION). AS USED HEREIN, THE TERMS
"OFFSHORE TRANSACTION," "UNITED STATES" AND "U.S. PERSON" HAVE THE MEANINGS
GIVEN TO THEM BY REGULATION S UNDER THE SECURITIES ACT. NO REPRESENTATION IS
MADE AS TO THE AVAILABILITY OF ANY EXEMPTION PROVIDED BY RULE 144(k) UNDER THE
SECURITIES ACT.

         (b) THIS SECURITY HAS NOT BEEN REGISTERED UNDER THE U. S. SECURITIES
ACT OF 1933, AS AMENDED (THE "SECURITIES ACT"), OR ANY STATE SECURITIES LAWS,
AND, ACCORDINGLY, PRIOR TO THE EXPIRATION OF THE DISTRIBUTION COMPLIANCE PERIOD,
THIS SECURITY MAY NOT BE OFFERED, SOLD, PLEDGED OR OTHERWISE TRANSFERRED TO ANY
U.S. PERSON OUTSIDE THE UNITED STATES OR ANY PERSON IN THE UNITED STATES. EACH
HOLDER AND BENEFICIAL OWNER, BY ITS ACCEPTANCE OF THIS SECURITY, REPRESENTS THAT
IT UNDERSTANDS AND AGREES TO THE FOREGOING AND FOLLOWING RESTRICTIONS. THIS
LEGEND WILL BE REMOVED AFTER THE END OF THE DISTRIBUTION COMPLIANCE PERIOD,
AFTER WHICH THIS SECURITY SHALL NO LONGER BE SUBJECT TO THE RESTRICTIONS
PROVIDED IN THIS LEGEND, PROVIDED THAT AT SUCH TIME AND THEREAFTER THE OFFER OR
SALE OF THIS SECURITY WOULD NOT BE RESTRICTED UNDER ANY APPLICABLE SECURITIES
LAWS OF THE UNITED STATES OR OF THE STATES OR TERRITORIES OF THE UNITED STATES.
AS USED HEREIN, THE TERMS "DISTRIBUTION COMPLIANCE PERIOD," "UNITED STATES" AND
"U.S. PERSON" HAVE THE MEANINGS GIVEN TO THEM BY REGULATION S UNDER THE
SECURITIES ACT.

         (c) Each Global Security shall bear the following legend on the face
thereof:

     "UNLESS THIS CERTIFICATE IS PRESENTED BY AN AUTHORIZED REPRESENTATIVE OF
THE DEPOSITORY TRUST COMPANY, A NEW YORK CORPORATION ("DTC"), NEW YORK, NEW
YORK, 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.

     TRANSFERS OF THIS GLOBAL SECURITY SHALL BE LIMITED TO TRANSFERS IN WHOLE,
BUT NOT IN PART, TO NOMINEES OF DTC OR TO A SUCCESSOR THEREOF OR SUCH
SUCCESSOR'S NOMINEE AND TRANSFERS OF PORTIONS OF THIS GLOBAL SECURITY SHALL BE
LIMITED TO TRANSFERS MADE IN ACCORDANCE WITH THE RESTRICTIONS SET FORTH IN THE
INDENTURE REFERRED TO ON THE REVERSE HEREOF."

                                      -23-

<PAGE>

SECTION 2.20   Special Transfer Provisions of the Restricted Securities.

         Unless otherwise provided in an Officers' Certificate or in a Company
Order establishing the terms of the Securities pursuant to Section 2.01, or
established in one or more indentures supplemental hereto, and unless and until
a Restricted Security is sold in connection with an effective registration
statement under the Securities Act or the Company determines to terminate the
applicability of any of the following provisions, the following provisions shall
apply:

         (a)   Transfers to Non-QIB IAIs. The following provisions shall apply
with respect to the registration of any proposed transfer of a Security or any
beneficial interest therein to any IAI which is not a QIB (excluding Non-U.S.
Persons):

         (1)   The Registrar shall register the transfer of any Security or
     beneficial interest therein, whether or not such Security bears the Private
     Placement Legend, if (x) the requested transfer is after the time period
     referred to in Rule 144(k) under the Securities Act or (y) the proposed
     transferee has delivered to the Registrar a certificate (the "IAI
     Certificate") substantially in the form specified pursuant to Section 2.01
     and an Opinion of Counsel as to compliance with the Securities Act.

         (2)   If the proposed transferor is an Agent Member holding a
     beneficial interest in the U.S. Global Securities, upon receipt by the
     Registrar of (x) the documents, if any, required by paragraph (1) above and
     (y) instructions given in accordance with the Depositary's and the
     Registrar's procedures, the Registrar shall reflect on its books and
     records the date and a decrease in the principal amount of the U.S. Global
     Securities in an amount equal to the principal amount of the beneficial
     interest in the U.S. Global Securities to be transferred, and the Company
     shall execute, and the Trustee shall authenticate and deliver, one or more
     U.S. Physical Securities of like tenor and amount.

         (b)   Transfers to QIBs. The following provisions shall apply with
respect to the registration of any proposed transfer of a Security or beneficial
interest therein to a QIB (excluding Non-U.S. Persons):

         (1)   If the Security to be transferred consists of (x) U.S. Physical
     Securities, the Registrar shall register the transfer if such transfer is
     being made by a proposed transferor who has checked the box provided for on
     the form of Security stating, or has otherwise advised the Company and the
     Registrar in writing, that the sale has been made in compliance with the
     provisions of Rule 144A to a transferee who has signed the certification
     provided for on the form of Security stating, or has otherwise advised the
     Company and the Registrar in writing, that it is purchasing the Security
     for its own account or an account with respect to which it exercises sole
     investment discretion and that it and any such account is a QIB within the
     meaning of Rule 144A and is aware that the sale to it is being made in
     reliance on Rule 144A and acknowledges that it has received such
     information regarding the Company as it has requested pursuant to Rule 144A
     or has determined not to request such information and that it is aware that
     the transferor is relying upon its foregoing representations in order to
     claim the exemption from registration provided by Rule 144A or (y) an
     interest in the U.S. Global Securities,

                                      -24-

<PAGE>

     the transfer of such interest may be effected only through the book entry
     system maintained by the Depositary.

         (2)   If the proposed transferee is an Agent Member, and the Security
     to be transferred consists of U.S. Physical Securities, upon receipt by the
     Registrar of the documents referred to in paragraph (1) above and
     instructions given in accordance with the Depositary's and the Registrar's
     procedures, the Registrar shall reflect on its books and records the date
     and an increase in the principal amount of U.S. Global Securities in an
     amount equal to the principal amount of the U.S. Physical Securities to be
     transferred, and the Trustee shall cancel the U.S. Physical Securities so
     transferred.

         (c)   Transfers of Interests in the Temporary Offshore Global
Securities. The following provisions shall apply with respect to registration of
any proposed transfer of an interest in a Temporary Offshore Global Security:

         (1)   The transfer of such interest may be effected only through the
     book entry system maintained by the appropriate Depositary and only if (x)
     the proposed transferee is a Non-U.S. Person and the proposed transferor
     has delivered to the Registrar a certificate (the "Regulation S
     Certificate") substantially in the form specified pursuant to Section 2.01
     or (y) the proposed transferee is a QIB and the proposed transferor has
     checked the box provided for on the form of Security stating, or has
     otherwise advised the Company and the Registrar in writing, that the sale
     has been made in compliance with the provisions of Rule 144A to a
     transferee who has signed the certification provided for on the form of
     Security stating, or has otherwise advised the Company and the Registrar in
     writing, that it is purchasing the Security for its own account or an
     account with respect to which it exercises sole investment discretion and
     that it and any such account is a QIB within the meaning of Rule 144A, and
     is aware that the sale to it is being made in reliance on Rule 144A and
     acknowledges that it has received such information regarding the Company as
     it has requested pursuant to Rule 144A or has determined not to request
     such information and that it is aware that the transferor is relying upon
     its foregoing representations in order to claim the exemption from
     registration provided by Rule 144A.

         (2)   If the proposed transferee is an Agent Member, upon receipt by
     the Registrar of the documents referred to in clause (1)(y) above and
     instructions given in accordance with the Depositary's and the Registrar's
     procedures, the Registrar shall reflect on its books and records the date
     and an increase in the principal amount of the U.S. Global Securities in an
     amount equal to the principal amount of the Temporary Offshore Global
     Securities to be transferred, and the Trustee shall decrease the amount of
     the Temporary Offshore Global Securities.

         (d)   Transfers of Interests in the Permanent Offshore Global
Securities or Offshore Physical Securities. The following provisions shall apply
with respect to any transfer of interests in Permanent Offshore Global
Securities or Offshore Physical Securities. The Registrar shall register the
transfer of any such Security without requiring any additional certification.
The transfer of interests in the Permanent Offshore Global Securities may be
effected only through the book entry system maintained by the appropriate
Depositary. The Registrar shall reflect on its books and records the date and a
decrease in the principal amount of

                                      -25-

<PAGE>

the Permanent Offshore Global Securities in an amount equal to the principal
amount of the beneficial interest in such Security to be transferred, and, if
the proposed transferee is an Agent Member that will take delivery in the form
of a beneficial interest in a Global Security, upon receipt by the Registrar of
instructions given in accordance with the Depositary's and the Registrar's
procedures, the Registrar shall reflect on its books and records the date and an
increase in the principal amount of such new Global Securities in an amount
equal to the principal amount of the applicable Securities to be transferred and
will simultaneously cancel a like principal amount of physical Securities being
surrendered for transfer or exchange, or simultaneously record a decrease in
like principal amount of the Global Security the beneficial interest in which is
being surrendered for transfer or exchange, as applicable.

          (e)  Transfers to Non-U.S. Persons at Any Time. The following
provisions shall apply with respect to any transfer of a Security or a
beneficial interest therein to a Non-U.S. Person:

          (1)  Prior to the termination of the Distribution Compliance Period,
     the Registrar shall register any proposed transfer of a Security to a
     Non-U.S. Person upon receipt of a certificate substantially in the form of
     the Regulation S Certificate from the proposed transferor.

          (2)  On and after the termination of the Distribution Compliance
     Period, the Registrar shall register any proposed transfer to any Non-U.S.
     Person if the Security to be transferred is a U.S. Physical Security or an
     interest in U.S. Global Securities, upon receipt of a certificate
     substantially in the form of the Regulation S Certificate from the proposed
     transferor. If the Security to be transferred is a U.S. Physical Security,
     the Company shall execute, and the Trustee shall authenticate and deliver,
     one or more Offshore Physical Securities of like tenor and amount, or, if
     the proposed transferee is an Agent Member, upon receipt by the Registrar
     of instructions given in accordance with the Depositary's and the
     Registrar's procedures, the Registrar shall reflect on its books and
     records the date and an increase in the principal amount of the Offshore
     Global Securities in an amount equal to the principal amount of the U.S.
     Physical Securities to be transferred, and the Trustee shall cancel the
     U.S. Physical Securities so transferred.

          (3)  (a) If the proposed transferor is an Agent Member holding a
     beneficial interest in the U.S. Global Securities, upon receipt by the
     Registrar of (x) the documents, if any, required by paragraph (2) and (y)
     instructions in accordance with the Depositary's and the Registrar's
     procedures, the Registrar shall reflect on its books and records the date
     and a decrease in the principal amount of the U.S. Global Securities in an
     amount equal to the principal amount of the beneficial interest in the U.S.
     Global Securities to be transferred, and (b) if the proposed transferee is
     an Agent Member, upon receipt by the Registrar of instructions given in
     accordance with the Depositary's and the Registrar's procedures, the
     Registrar shall reflect on its books and records the date and an increase
     in the principal amount of the Offshore Global Securities in an amount
     equal to the principal amount of the U.S. Global Securities to be
     transferred, and the Trustee shall decrease the principal amount of the
     U.S. Global Securities.

                                      -26-

<PAGE>

          (f)  Private Placement Legend. Upon the transfer, exchange or
     replacement of Securities not bearing the Private Placement Legend, the
     Registrar shall deliver Securities that do not bear the Private Placement
     Legend. Upon the transfer, exchange or replacement of Securities bearing
     the Private Placement Legend, the Registrar shall deliver only Securities
     that bear the Private Placement Legend unless either (i) the circumstances
     contemplated by paragraph (a)(1)(x) or (e)(2) of this Section 2.20 exist or
     (ii) there is delivered to the Registrar an Opinion of Counsel reasonably
     satisfactory to the Company to the effect that neither such legend nor the
     related restrictions on transfer are required in order to maintain
     compliance with the provisions of the Securities Act.

          (g)  General. By its acceptance of any Security bearing the Private
     Placement Legend, each Holder of such a Security acknowledges the
     restrictions on transfer of such Security set forth in this Indenture and
     in the Private Placement Legend and agrees that it will transfer such
     Security only as provided in this Indenture. The Registrar shall be
     entitled to receive and rely on written instructions from the Company
     verifying that such transfer complies with such restrictions on transfer.
     In connection with any transfer of Securities, each Holder agrees by its
     acceptance of the Securities to furnish the Registrar or the Company such
     certifications, legal opinions or other information as either of them may
     reasonably require to confirm that such transfer is being made pursuant to
     an exemption from, or a transaction not subject to, the registration
     requirements of the Securities Act; provided that the Registrar shall not
     be required to determine (but may rely on a determination made by the
     Company with respect to) the sufficiency of any such certifications, legal
     opinions or other information.

          The Registrar shall retain copies of all letters, notices and other
written communications received pursuant to Section 2.08 or this Section 2.20.
The Company shall have the right to inspect and make copies of all such letters,
notices or other written communications at any reasonable time upon the giving
of reasonable written notice to the Registrar.

                                  ARTICLE III

                                   REDEMPTION

SECTION 3.01   Applicability of Article.

          Securities of any series that are redeemable before their Stated
Maturity shall be redeemable in accordance with their terms and (except as
otherwise specified as contemplated by Section 2.01 for Securities of any
series) in accordance with this Article III.

SECTION 3.02   Notice to the Trustee.

          If the Company elects to redeem Securities of any series pursuant to
this Indenture, it shall notify the Trustee of the Redemption Date and principal
amount of Securities of such series to be redeemed. The Company shall so notify
the Trustee at least 45 days before the Redemption Date (unless a shorter notice
shall be satisfactory to the Trustee) by delivering to the Trustee an Officers'
Certificate stating that such redemption will comply with the provisions of this
Indenture and of the Securities of such series. Any such notice may be canceled
at any

                                      -27-

<PAGE>

time prior to the mailing of such notice of such redemption to any Holder and
shall thereupon be void and of no effect.

SECTION 3.03   Selection of Securities To Be Redeemed.

          If less than all the Securities of any series are to be redeemed
(unless all of the Securities of such series of a specified tenor are to be
redeemed), the particular Securities to be redeemed shall be selected not more
than 60 days prior to the Redemption Date by the Trustee, from the outstanding
Securities of such series (and tenor) not previously called for redemption,
either pro rata, by lot or by such other method as the Trustee shall deem
appropriate in accordance with industry standards at the time of such redemption
and that may provide for the selection for redemption of portions (equal to the
minimum authorized denomination for Securities of that series or any integral
multiple thereof) of the principal amount of Securities of such series of a
denomination larger than the minimum authorized denomination for Securities of
that series or of the principal amount of Global Securities of such series;
provided, that if at the time of redemption such Securities are registered as a
Global Security, the Depositary shall determine, in accordance with its
procedures, the principal amount of such Securities held by each beneficial
owner of Securities to be redeemed.

          The Trustee shall promptly notify the Company and the 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 purposes of this Indenture, unless the context otherwise requires,
all provisions relating to redemption of Securities shall relate, in the case of
any of the Securities redeemed or to be redeemed only in part, to the portion of
the principal amount thereof which has been or is to be redeemed.

SECTION 3.04   Notice of Redemption.

          Notice of redemption shall be given by first-class mail, postage
prepaid, mailed not less than 20 nor more than 60 days prior to the Redemption
Date, to each Holder of Securities to be redeemed, at the address of such Holder
appearing in the register of Securities maintained by the Registrar.

          All notices of redemption shall identify the Securities to be redeemed
and shall state:

          (1)  the Redemption Date;

          (2)  the Redemption Price;

          (3)  that, unless the Company defaults in making the redemption
     payment, interest on Securities called for redemption ceases to accrue on
     and after the Redemption Date, and the only remaining right of the Holders
     of such Securities is to receive payment of the Redemption Price upon
     surrender to the Paying Agent of the Securities redeemed;

                                      -28-

<PAGE>

          (4)  if any Security is to be redeemed in part, the portion of the
     principal amount thereof to be redeemed and that on and after the
     Redemption Date, upon surrender for cancellation of such Security to the
     Paying Agent, a new Security or Securities in the aggregate principal
     amount equal to the unredeemed portion thereof will be issued without
     charge to the Holder;

          (5)  that Securities called for redemption must be surrendered to the
     Paying Agent to collect the Redemption Price and the name and address of
     the Paying Agent;

          (6)  that the redemption is for a sinking or analogous fund, if such
     is the case;

          (7)  the CUSIP number, if any, relating to such Securities; and

          (8)  if applicable, the date on which the right to convert is
     terminated.

          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 and at the expense of the Company.

SECTION 3.05   Effect of Notice of Redemption.

          Once notice of redemption is mailed, Securities called for redemption
become due and payable on the Redemption Date and at the Redemption Price. Such
Securities called for redemption shall be paid at the Redemption Price, but
interest installments whose maturity is on or prior to such Redemption Date will
be payable on the relevant Interest Payment Dates to the Holders of record at
the close of business on the relevant record dates specified pursuant to Section
2.01. In the case of certificated Securities, such payments shall be made only
upon surrender of the certificate to the Paying Agent.

SECTION 3.06   Deposit of Redemption Price.

          On or prior to any Redemption Date, the Company shall deposit with the
Trustee or the Paying Agent (or, if the Company is acting as its own Paying
Agent, segregate and hold in trust as provided in Section 2.06) an amount of
money in same day funds sufficient to pay the Redemption Price of, and (except
if the Redemption Date shall be an Interest Payment Date) accrued interest on
and any Additional Amounts with respect to, the Securities or portions thereof
which are to be redeemed on that date, other than Securities or portions thereof
called for redemption on that date which have been delivered by the Company to
the Trustee for cancellation. The Trustee shall not be bound to make payment
until it is satisfied that full payment has been received from the Company.

          If the Company complies with the preceding paragraph, then, unless the
Company defaults in the payment of such Redemption Price, interest on the
Securities to be redeemed will cease to accrue on and after the applicable
Redemption Date, whether or not such Securities are presented for payment, and
the Holders of such Securities shall have no further rights with respect to such
Securities except for the right to receive the Redemption Price upon surrender
of such Securities, if certificated. If any Security called for redemption shall
not be so paid upon surrender thereof for redemption, the principal, premium, if
any, any Additional Amounts, and,

                                      -29-

<PAGE>

to the extent lawful, accrued interest thereon shall, until paid, bear interest
from the Redemption Date at the rate specified pursuant to Section 2.01 or
provided in the Securities or, in the case of Original Issue Discount
Securities, such Securities' yield to maturity.

SECTION 3.07   Securities Redeemed or Purchased in Part.

          Upon surrender to the Paying Agent of a Security to be redeemed in
part, the Company shall execute and the Trustee shall authenticate and deliver
to the Holder of such Security without service charge a new Security or
Securities, of the same series and 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 that is not
redeemed.

SECTION 3.08   Purchase of Securities.

          Unless otherwise specified as contemplated by Section 2.01, the
Company and any Affiliate of the Company may at any time purchase or otherwise
acquire Securities in the open market or by private agreement. Such acquisition
shall not operate as or be deemed for any purpose to be a redemption of the
indebtedness represented by such Securities. Any Securities purchased or
acquired by the Company may be delivered to the Trustee and, upon such delivery,
the indebtedness represented thereby shall be deemed to be satisfied. Section
2.13 shall apply to all Securities so delivered.

SECTION 3.09   Mandatory and Optional Sinking Funds.

          The minimum amount of any sinking fund payment provided for by the
terms of Securities of any series is herein referred to as a "mandatory sinking
fund payment," and any payment in excess of such minimum amount provided for by
the terms of Securities of any series is herein referred to as an "optional
sinking fund payment." Unless otherwise provided by the terms of Securities of
any series, the cash amount of any sinking fund payment may be subject to
reduction as provided in Section 3.10. Each sinking fund payment shall be
applied to the redemption of Securities of any series as provided for by the
terms of Securities of such series and by this Article III.

SECTION 3.10   Satisfaction of Sinking Fund Payments with Securities.

          The Company may deliver outstanding Securities of a series (other than
any previously called for redemption) and may apply as a credit Securities of a
series that have been redeemed either at the election of the Company pursuant to
the terms of such Securities or through the application of permitted optional
sinking fund payments pursuant to the terms of such Securities, in each case in
satisfaction of all or any part of any sinking fund payment with respect to the
Securities of such series required to be made pursuant to the terms of such
series of Securities; provided that such Securities have not been previously so
credited. Such Securities shall be received and credited for such purpose by the
Trustee at the Redemption Price specified in such Securities for redemption
through operation of the sinking fund and the amount of such sinking fund
payment shall be reduced accordingly.

                                      -30-

<PAGE>

SECTION 3.11   Redemption of Securities for Sinking Fund.

          Not less than 45 days prior (unless a shorter period shall be
satisfactory to the Trustee) to each sinking fund payment date for any series of
Securities, the Company will deliver to the Trustee an Officers' Certificate
specifying the amount of the next ensuing sinking fund payment for that series
pursuant to the terms of that series, the portion thereof, if any, which is to
be satisfied by payment of cash and the portion thereof, if any, which is to be
satisfied by delivery of or by crediting Securities of that series pursuant to
Section 3.10 and will also deliver to the Trustee any Securities to be so
delivered. Failure of the Company to timely deliver such Officers' Certificate
and Securities specified in this paragraph, if any, shall not constitute a
default but shall constitute the election of the Company (i) that the mandatory
sinking fund payment for such series due on the next succeeding sinking fund
payment date shall be paid entirely in cash without the option to deliver or
credit Securities of such series in respect thereof and (ii) that the Company
will make no optional sinking fund payment with respect to such series as
provided in this Section.

          If the sinking fund payment or payments (mandatory or optional or
both) to be made in cash on the next succeeding sinking fund payment date plus
any unused balance of any preceding sinking fund payments made in cash shall
exceed $100,000 (or the Dollar equivalent thereof based on the applicable
Exchange Rate on the date of original issue of the applicable Securities) or a
lesser sum if the Company shall so request with respect to the Securities of any
particular series, such cash shall be applied on the next succeeding sinking
fund payment date to the redemption of Securities of such series at the sinking
fund redemption price together with accrued interest to the date fixed for
redemption. If such amount shall be $100,000 (or the Dollar equivalent thereof
as aforesaid) or less and the Company makes no such request then it shall be
carried over until a sum in excess of $100,000 (or the Dollar equivalent thereof
as aforesaid) is available. Not less than 30 days before each such sinking fund
payment date, the Trustee shall select the Securities to be redeemed upon such
sinking fund payment date in the manner specified in Section 3.03 and cause
notice of the redemption thereof to be given in the name of and at the expense
of the Company in the manner provided in Section 3.04. Such notice having been
duly given, the redemption of such Securities shall be made upon the terms and
in the manner stated in Sections 3.05, 3.06 and 3.07.

                                   ARTICLE IV

                                    COVENANTS

SECTION 4.01   Payment of Securities.

          The Company shall pay the principal of, premium (if any) and interest
on and any Additional Amounts with respect to the Securities of each series on
the dates and in the manner provided in the Securities of such series and in
this Indenture. Principal, premium, interest and any Additional Amounts shall be
considered paid on the date due if the Paying Agent, other than the Company or a
Subsidiary of the Company, holds on that date money deposited by the Company
designated for and sufficient to pay all principal, premium (if any), interest
and any Additional Amounts then due.

                                      -31-

<PAGE>

          The Company shall pay interest (including post-petition interest in
any proceeding under any Bankruptcy Law) on overdue principal and premium (if
any), at a rate equal to the then applicable interest rate on the Securities to
the extent lawful; and it shall pay interest (including post-petition interest
in any proceeding under any Bankruptcy Law) on overdue installments of interest
and any Additional Amount (without regard to any applicable grace period) at the
same rate to the extent lawful.

SECTION 4.02   Maintenance of Office or Agency.

          The Company will maintain in each Place of Payment for any series of
Securities an office or agency (which may be an office of the Trustee, the
Registrar or the Paying Agent) where Securities of that series may be presented
for registration of transfer or exchange, where Securities of that series may be
presented for payment and where notices and demands to or upon the Company in
respect of the Securities of that series and this Indenture may be served.
Unless otherwise designated by the Company by written notice to the Trustee,
such office or agency shall be the office of the Trustee, which on the date
hereof is located at 111 Wall Street, 14th Floor, New York, New York 10005. The
Company will give prompt written notice to the Trustee of the location, and any
change in the location, of such office or agency. 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 of the
Trustee.

          The Company may also from time to time designate one or more other
offices or agencies where the Securities of one or more series may be presented
or surrendered for any or all such purposes and may from time to time rescind
such designations; provided, however, that no such designation or rescission
shall in any manner relieve the Company of its obligation to maintain an office
or agency in each Place of Payment for Securities of any series for such
purposes. The Company will give prompt written notice to the Trustee of any such
designation or rescission and of any change in the location of any such other
office or agency.

SECTION 4.03   SEC Reports; Financial Statements.

          (a)  If the Company is subject to Section 13 or 15(d) of the Exchange
Act, the Company shall file with the Trustee, within 15 days after it files the
same with the SEC, copies of the annual reports and the information, documents
and other reports (or copies of such portions of any of the foregoing as the SEC
may by rules and regulations prescribe) that the Company is required to file
with the SEC pursuant to Section 13 or 15(d) of the Exchange Act. If this
Indenture is qualified under the TIA, but not otherwise, the Company shall also
comply with the provisions of TIA (S) 314(a).

          (b)  If the Company is not subject to the requirements of Section 13
or 15(d) of the Exchange Act, the Company shall furnish to the Trustee and all
Holders of Rule 144A Securities and prospective purchasers of Rule 144A
Securities designated by the Holders of Rule 144A Securities, promptly upon
their request, the information required to be delivered pursuant to Rule
144A(d)(4) promulgated under the Securities Act.

                                      -32-

<PAGE>

SECTION 4.04   Compliance Certificate.

          (a)  The Company shall deliver to the Trustee, within 120 days after
the end of each fiscal year of the Company, a statement, signed by the principal
executive officer, principal financial officer or principal accounting officer
of the Company, which need not constitute an Officers' Certificate, complying
with TIA (S) 314(a)(4) and stating that in the course of performance by the
signing Officer of the Company of his duties as such Officer of the Company he
would normally obtain knowledge of the keeping, observing, performing and
fulfilling by the Company of its obligations under this Indenture, and further
stating that to the best of his knowledge the Company has kept, observed,
performed and fulfilled each and every covenant contained in this Indenture and
is not in default in the performance or observance of any of the terms,
provisions and conditions hereof (or, if a Default or Event of Default shall
have occurred, describing all such Defaults or Events of Default of which such
Officer may have knowledge and what action the Company is taking or proposes to
take with respect thereto).

          (b)  The Company shall, so long as Securities of any series are
outstanding, deliver to the Trustee, as soon as practicable, but in no event
more than 5 Business Days after, any Officer of the Company becoming aware of
any Default or Event of Default under this Indenture, an Officers' Certificate
specifying such Default or Event of Default and what action the Company is
taking or proposes to take with respect thereto.

SECTION 4.05   Existence.

          Subject to Article V hereof, the Company shall do or cause to be done
all things necessary to preserve and keep in full force and effect its existence
and the existence of each of its Subsidiaries and all rights (charter and
statutory) and franchises of the Company and its Subsidiaries, provided that the
Company shall not be required to preserve the existence of any Subsidiary of the
Company or any such right or franchise if the Company shall determine that the
preservation thereof is no longer desirable in the conduct of the business of
the Company and its Subsidiaries taken as a whole and that the loss thereof
would not have a material adverse effect on the business, prospects, assets or
financial condition of the Company and its Subsidiaries taken as a whole and
would not have any material adverse effect on the payment and performance of the
obligations of the Company under the Securities and this Indenture.

SECTION 4.06   Waiver of Stay, Extension or Usury 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 or extension law or any usury law
or other law that would prohibit or forgive the Company from paying all or any
portion of the principal of or interest on the Securities as contemplated
herein, wherever enacted, now or at any time hereafter in force, or which may
affect the covenants or the performance of this Indenture; and (to the extent
that it may lawfully do so) the Company hereby expressly waives all benefit or
advantage of any such law, and covenants that it will not hinder, delay or
impede 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.

                                      -33-

<PAGE>

SECTION 4.07   Additional Amounts.

          If the Securities of a series expressly provide for the payment of
Additional Amounts, the Company will pay to the Holder of any Security of such
series Additional Amounts as expressly provided therein. Whenever in this
Indenture there is mentioned, in any context, the payment of the principal of or
any premium or interest on, or in respect of, any Security of any series or the
net proceeds received from the sale or exchange of any Security of any series,
such mention shall be deemed to include mention of the payment of Additional
Amounts provided for in this Section 4.07 to the extent that, in such context,
Additional Amounts are, were or would be payable in respect thereof pursuant to
the provisions of this Section 4.07 and express mention of the payment of
Additional Amounts (if applicable) in any provisions hereof shall not be
construed as excluding Additional Amounts in those provisions hereof where such
express mention is not made.

          Unless otherwise provided pursuant to Section 2.01 with respect to
Securities of any series: If the Securities of a series provide for the payment
of Additional Amounts, at least ten days prior to the first Interest Payment
Date with respect to that series of Securities (or if the Securities of that
series will not bear interest prior to Maturity, the first day on which a
payment of principal and any premium is made), and at least ten days prior to
each date of payment of principal and any premium or interest if there has been
any change with respect to the matters set forth in the below-mentioned
Officers' Certificate, the Company shall furnish the Trustee and the Company's
principal Paying Agent or Paying Agents, if other than the Trustee, with an
Officers' Certificate instructing the Trustee and such Paying Agent or Paying
Agents whether such payment of principal of and any premium or interest on the
Securities of that series shall be made to Holders of Securities of that series
without withholding for or on account of any tax, assessment or other
governmental charge described in the Securities of that series. If any such
withholding shall be required, then such Officers' Certificate shall specify by
country the amount, if any, required to be withheld on such payments to such
Holders of Securities and the Company will pay to such Paying Agent the
Additional Amounts required by this Section. The Company covenants to indemnify
the Trustee and any Paying Agent for and to hold them harmless against any loss,
liability or expense reasonably incurred without negligence or willful
misconduct on their part arising out of or in connection with actions taken or
omitted by any of them in reliance on any Officers' Certificate furnished
pursuant to this Section 4.07.

SECTION 4.08   Limitation on Liens.

          The Company will not itself, and will not permit any Restricted
Subsidiary to, incur, issue, assume or guarantee any Debt secured by a Mortgage,
on any Restricted Property, or on any shares of stock, ownership interests in,
or indebtedness of a Restricted Subsidiary, without effectively providing
concurrently with the incurrence, issuance, assumption or guarantee of such
secured Debt that the Securities (together with, if the Company shall so
determine, any other indebtedness or other obligation of the Company or such
Restricted Subsidiary then existing or thereafter created ranking on a parity
with the Securities) shall be secured equally and ratably with (or prior to)
such secured Debt, so long as such secured Debt shall be so secured, unless,
after giving effect thereto, the aggregate amount of all such secured Debt
(excluding any Debt secured by Mortgages of the types referred to in clauses (a)
through (e) below) plus all Attributable Debt of the Company and its Restricted
Subsidiaries in respect

                                      -34-

<PAGE>

of Sale and Leaseback Transactions (as defined in Section 4.09) involving
Restricted Property, but excluding any Attributable Debt in respect of any such
Sale and Leaseback Transactions, the proceeds of which have been applied to the
retirement of Funded Debt pursuant to clause (c) of Section 4.09, would not
exceed 10% of Consolidated Net Assets; provided, however, that this Section 4.08
shall not apply to:

          (a)  Mortgages existing on the date of first issuance of a series of
Securities;

          (b)  Mortgages on property of, or on any shares of stock, ownership
interests in or indebtedness of, any Person existing at the time such Person
becomes a Subsidiary or a Restricted Subsidiary;

          (c)  Mortgages on property existing at the time of acquisition thereof
(including acquisition through merger or consolidation) or to secure the payment
of all or any part of the purchase price or cost of construction, development,
expansion or improvement thereof or to secure any indebtedness incurred prior
to, at the time of, or within 12 months after, the acquisition or completion of
construction, development, expansion or improvement of such property or its
commencement of commercial operations for the purpose of financing all or any
part of the purchase price or cost of construction, development, expansion or
improvement thereof;

          (d)  Mortgages in favor of the Company or any Restricted Subsidiary;
and

          (e)  any extension, renewal or replacement (or successive extensions,
renewals or replacements), as a whole or in part, of any Mortgage referred to in
the foregoing clauses (a) to (d), inclusive; provided, that such extension,
renewal or replacement Mortgage shall be limited to all or a part of the same
property that secured the Mortgage extended, renewed or replaced (plus
improvements on such property).

          The following types of transactions shall not be deemed to create Debt
secured by a Mortgage within the meaning of the foregoing paragraph: the
Mortgage of any property of the Company or any Subsidiary in favor of the United
States, or any state, or any entity, department, agency, instrumentality or
political subdivision of either, to secure partial, progress, advance or other
payments to the Company or any Subsidiary pursuant to the provisions of any
contract or statute, or the Mortgage of any property to secure indebtedness of
the pollution control, industrial revenue or other revenue bond type.

SECTION 4.09   Limitation on Sale and Leaseback Transactions.

          The Company will not itself, and will not permit any Restricted
Subsidiary to, enter into any arrangement with any bank, insurance company or
other lender or investor (not including the Company or any Restricted
Subsidiary), or to which any such lender or investor is a party, providing for
the leasing by the Company or such Restricted Subsidiary for a period, including
renewals, in excess of three years of any Restricted Property that has been
owned and operated by the Company or such Restricted Subsidiary for more than 12
months and which has been or is to be sold or transferred by the Company or such
Restricted Subsidiary to such lender or investor or to any Person to whom funds
have been or are to be advanced by such lender or

                                      -35-

<PAGE>

investor on the security of such Restricted Property (herein referred to as a
"Sale and Leaseback Transaction") unless either:

          (a) the Company or such Restricted Subsidiary could create Debt
secured by a Mortgage pursuant to Section 4.08 on the Restricted Property to be
leased, in an amount equal to the Attributable Debt with respect to such Sale
and Leaseback Transaction, without equally and ratably securing the Securities;

          (b) since the Issue Date and within a period commencing 12 months
prior to the consummation of the Sale and Leaseback Transaction and ending 12
months after the consummation of such Sale and Leaseback Transaction, the
Company or any Restricted Subsidiary has expended or will expend for the
purchase, construction, development, expansion or improvement of any Restricted
Property an amount equal to (i) the greater of (x) the net proceeds of such Sale
and Leaseback Transaction and (y) the fair market value of the Restricted
Property so leased at the time of entering into such transaction, as determined
by the Company (the greater of the sums specified in clauses (x) and (y) being
referred to herein as the "Net Proceeds" of such transaction), and the Company
elects to designate such amount as satisfying any obligation it would otherwise
have under clause (c) of this Section 4.09 or (ii) a part of the Net Proceeds of
such transaction and the Company elects to designate such amount as satisfying
part of the obligation it would otherwise have under clause (c) of this Section
4.09 and applies an amount equal to the remainder of such Net Proceeds as
provided in clause (c) of this Section 4.09; or

          (c) the Company within 12 months of the consummation of any such Sale
and Leaseback Transaction, applies an amount equal to the Net Proceeds of such
transaction (less any amount elected under clause (b) of this Section 4.09) to
the retirement of Funded Debt of the Company ranking on a parity with the
Securities. No retirement referred to in this clause (c) may be effected by
payment at maturity or pursuant to any mandatory sinking fund or prepayment
provision.

                                   ARTICLE V

                                   SUCCESSORS

SECTION 5.01  Limitations on Mergers and Consolidations.

          The Company shall not (a) consolidate or amalgamate with or merge into
any Person, or sell, convey, lease or transfer its properties or assets
substantially as an entirety to any other Person in any one transaction or
series of related transactions, or (b) permit any Person to consolidate or
amalgamate with or merge into the Company, unless:

          (1) either (a) the Company shall be the continuing Person or (b) the
     Person (if other than the Company) formed by such consolidation or
     amalgamation or into which the Company is merged, or the Person to which
     the Company's properties or assets are so transferred (collectively, the
     "Successor"), executes and delivers to the Trustee a supplemental indenture
     expressly assuming the payment when due of the principal of (and premium,
     if any) and interest on and Additional Amounts with respect to all the

                                      -36-

<PAGE>

     Securities and the performance of the Company's covenants and obligations
     under this Indenture and the Securities;

          (2) immediately after giving effect to such transaction or series of
     transactions, no Default or Event of Default shall have occurred and be
     continuing or would result therefrom; and

          (3) the Company delivers to the Trustee an Officers' Certificate and
     an Opinion of Counsel, each stating that the transaction and any such
     supplemental indenture (if required) comply with this Indenture.

SECTION 5.02  Successor Person Substituted.

          Upon any consolidation, amalgamation or merger of the Company or any
sale, conveyance, lease or other transfer of all or substantially all of the
assets of the Company in accordance with Section 5.01, the Successor formed by
such consolidation or into or with which the Company is merged or to which such
sale, conveyance, lease or other transfer is made shall succeed to, and be
substituted for, and may exercise every right and power of the Company under
this Indenture and the Securities with the same effect as if such Successor had
been named as the Company herein and the predecessor Company, in the case of a
sale, conveyance, lease or other transfer, shall be released from all
obligations under this Indenture and the Securities.

                                   ARTICLE VI

                              DEFAULTS AND REMEDIES

SECTION 6.01  Events of Default.

          Unless either inapplicable to a particular series or specifically
deleted or modified in or pursuant to the supplemental indenture or Board
Resolution establishing such series of Securities or in the form of Security for
such series, an "Event of Default," wherever used herein with respect to
Securities of any series, occurs if:

              (1) the Company defaults in the payment of interest on or any
     Additional Amounts with respect to any Security of that series when the
     same becomes due and payable and such default continues for a period of 30
     days;

              (2) the Company defaults in the payment of (A) the principal of
     and accrued interest on any Security of that series at its Maturity or (B)
     premium (if any) on any Security of that series, when the same becomes due
     and payable;

              (3) the Company or any Significant Subsidiary defaults under any
     instrument or instruments evidencing Indebtedness (other than any Security)
     having an outstanding principal amount of $125,000,000 (or its equivalent
     in any foreign currency or currencies) or more that has caused the holders
     thereof to declare such Indebtedness to be due and payable prior to the
     stated maturity of such Indebtedness unless such declaration has been
     rescinded within 30 days;

                                      -37-

<PAGE>

              (4) the Company or any Significant Subsidiary defaults in the
     payment of any Indebtedness for money borrowed in an aggregate principal
     amount exceeding $125,000,000 (or its equivalent in any foreign currency or
     currencies) when such Indebtedness becomes due and payable at final
     maturity and such default continues unwaived or unremedied for more than 30
     Business Days after the expiration of any grace period or extension of the
     time for payment applicable thereto;

              (5) the Company defaults in the deposit of any sinking fund
     payment, when and as due by the terms of a Security of that series, and
     such default continues for a period of 30 days;

              (6) the Company fails to comply with any of its other covenants or
     agreements in, or provisions of, the Securities of such series or this
     Indenture (other than an agreement, covenant or provision that has
     expressly been included in this Indenture solely for the benefit of one or
     more series of Securities other than that series) which shall not have been
     remedied within the specified period after written notice, as specified in
     the last paragraph of this Section 6.01;

              (7) the Company or any Significant Subsidiary pursuant to or
     within the meaning of any Bankruptcy Law:

              (A) commences a voluntary case,

              (B) consents to the entry of an order for relief against it in an
          involuntary case,

              (C) consents to the appointment of a Bankruptcy Custodian of it
          or for all or substantially all of its property, or

              (D) makes a general assignment for the benefit of its creditors;

              (8) a court of competent jurisdiction enters an order or decree
     under any Bankruptcy Law that remains unstayed and in effect for 90 days
     and that:

              (A) is for relief against the Company or any Significant
          Subsidiary as debtor in an involuntary case,

              (B) appoints a Bankruptcy Custodian of the Company or any
          Significant Subsidiary or a Bankruptcy Custodian for all or
          substantially all of the property of the Company or any Significant
          Subsidiary, or

              (C) orders the liquidation of the Company or any Significant
          Subsidiary; or

              (9) any other Event of Default provided with respect to Securities
     of that series occurs.

                                      -38-

<PAGE>

          The term "Bankruptcy Custodian" means any receiver, trustee, assignee,
liquidator or similar official under any Bankruptcy Law.

          The Trustee shall not be deemed to know or have notice of a Default
unless a Trust Officer at the Corporate Trust Office of the Trustee responsible
for the administration of this Indenture receives written notice at the
Corporate Trust Office of the Trustee of such Default with specific reference to
such Default.

          When a Default is cured, it ceases.

          Notwithstanding the foregoing provisions of this Section 6.01, if the
principal of, premium (if any) or interest on or Additional Amounts with respect
to any Security is payable in a currency or currencies (including a composite
currency) other than Dollars and such currency or currencies are not available
to the Company for making payment thereof due to the imposition of exchange
controls or other circumstances beyond the control of the Company (a "Conversion
Event"), the Company will be entitled to satisfy its obligations to Holders of
the Securities by making such payment in Dollars in an amount equal to the
Dollar equivalent of the amount payable in such other currency, as determined by
the Company by reference to the Exchange Rate on the date of such payment, or,
if such rate is not then available, on the basis of the most recently available
Exchange Rate. Notwithstanding the foregoing provisions of this Section 6.01,
any payment made under such circumstances in Dollars where the required payment
is in a currency other than Dollars will not constitute an Event of Default
under this Indenture.

          Promptly after the occurrence of a Conversion Event, the Company shall
give written notice thereof to the Trustee; and the Trustee, promptly after
receipt of such notice, shall give notice thereof in the manner provided in
Section 10.02 to the Holders. Promptly after the making of any payment in
Dollars as a result of a Conversion Event, the Company shall give notice in the
manner provided in Section 10.02 to the Holders, setting forth the applicable
Exchange Rate and describing the calculation of such payments.

          A Default under clause (6) or (9) of this Section 6.01 is not an Event
of Default until the Trustee notifies the Company, or the Holders of at least
25% in principal amount of the then outstanding Securities of the series
affected by such Default (or, in the case of a Default relating to the Company's
failure to comply with the covenants in Sections 4.07 or 4.08, if outstanding
Securities of other series are affected by such Default, then at least 25% in
principal amount of the then outstanding Securities so affected) notify the
Company and the Trustee, of the Default, and the Company fails to cure the
Default within 60 days after receipt of the notice. The notice must specify the
Default, demand that it be remedied and state that the notice is a "Notice of
Default."

SECTION 6.02  Acceleration.

          If an Event of Default with respect to any Securities of any series at
the time outstanding (other than an Event of Default specified in clause (7) or
(8) of Section 6.01 with respect to the Company) occurs and is continuing, the
Trustee by notice to the Company, or the Holders of at least 25% in principal
amount of the then outstanding Securities of the series affected by such Event
of Default (or, in the case of an Event of Default relating to the

                                      -39-

<PAGE>

Company's failure to comply with the covenants in Sections 4.07 or 4.08, if
outstanding Securities of other series are affected by such Event of Default,
then at least 25% in principal amount of the then outstanding Securities so
affected) by notice to the Company and the Trustee, may declare the principal of
(or, if any such Securities are Original Issue Discount Securities, such portion
of the principal amount as may be specified in the terms of that series) and all
accrued and unpaid interest on all then outstanding Securities of such series or
of all series, as the case may be, to be due and payable. Upon any such
declaration the amounts due and payable on the Securities shall be due and
payable immediately. If an Event of Default specified in clause (7) or (8) of
Section 6.01 hereof occurs with respect to the Company, such amounts shall ipso
facto become and be immediately due and payable without any declaration, notice
or other act on the part of the Trustee or any Holder. The Holders of a majority
in principal amount of the then outstanding Securities of the series affected by
such Event of Default or all series so affected, as the case may be, by written
notice to the Trustee may rescind an acceleration and its consequences (other
than nonpayment of principal of or premium or interest on or any Additional
Amounts with respect to the Securities) if the rescission would not conflict
with any judgment or decree and if all existing Events of Default with respect
to Securities of that series (or of all series, as the case may be) have been
cured or waived, except nonpayment of principal, premium, interest or any
Additional Amounts that has become due solely because of the acceleration.

SECTION 6.03  Other Remedies.

          If an Event of Default occurs and is continuing, the Trustee may
pursue any available remedy to collect the payment of principal of, or premium,
if any, or interest on the Securities or to enforce the performance of any
provision of the Securities or this Indenture.

          The Trustee may maintain a proceeding even if it does not possess any
of the Securities or does not produce any of them in the proceeding. A delay or
omission by the Trustee or any Holder in exercising any right or remedy accruing
upon an Event of Default shall not impair the right or remedy or constitute a
waiver of or acquiescence in the Event of Default. All remedies are cumulative
to the extent permitted by law.

SECTION 6.04  Waiver of Defaults.

          Subject to Sections 6.07 and 9.02, the Holders of a majority in
principal amount of the then outstanding Securities of any series (or of all
series affected thereby, acting as one class in the case of the Company's
failure to comply with the covenants in Sections 4.08 and 4.09) by notice to the
Trustee may waive an existing or past Default or Event of Default with respect
to such series or all series, as the case may be, and its consequences
(including waivers obtained in connection with a tender offer or exchange offer
for Securities of such series or all series or a solicitation of consents in
respect of Securities of such series or all series, provided that in each case
such offer or solicitation is made to all Holders of then outstanding Securities
of such series or all series (but the terms of such offer or solicitation may
vary from series to series)), except (1) a continuing Default or Event of
Default in the payment of the principal of, or premium, if any, or interest on
or any Additional Amounts with respect to any Security or (2) a continued
Default in respect of a provision that under Section 9.02 cannot be amended or
supplemented without the consent of each Holder affected. Upon any such waiver,
such Default

                                      -40-

<PAGE>

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 6.05  Control by Majority.

         With respect to Securities of any series, the Holders of a majority in
principal amount of the then outstanding Securities of such series may direct in
writing the time, method and place of conducting any proceeding for any remedy
available to the Trustee or exercising any trust or power conferred on it
relating to or arising under an Event of Default described in clause (1) through
(6) (other than Events of Default resulting from failures to comply with the
covenants in Section 4.08 or 4.09) or (9) of Section 6.01, and with respect to
all Securities, the Holders of a majority in principal amount of all the then
outstanding Securities affected may direct in writing the time, method and place
of conducting any proceeding for any remedy available to the Trustee or
exercising any trust or power conferred on it not relating to or arising under
such an Event of Default. However, the Trustee may refuse to follow any
direction that conflicts with applicable law or this Indenture that the Trustee
determines may be unduly prejudicial to the rights of other Holders, or that may
involve the Trustee in personal liability; provided, however, that the Trustee
may take any other action deemed proper by the Trustee that is not inconsistent
with such direction. Prior to taking any action hereunder, the Trustee shall be
entitled to indemnification satisfactory to it in its sole discretion from
Holders directing the Trustee against all losses and expenses caused by taking
or not taking such action.

SECTION 6.06  Limitations on Suits.

         Subject to Section 6.07 hereof, a Holder of a Security of any series
may pursue a remedy with respect to this Indenture or the Securities of such
series only if:

         (1)  the Holder gives to the Trustee written notice of a continuing
     Event of Default with respect to such series;

         (2)  the Holders of at least 25% in principal amount of the then
     outstanding Securities of such series make a written request to the Trustee
     to pursue the remedy;

         (3)  the Trustee does not comply with the request within 60 days after
     receipt of the request; and

         (4)  during such 60-day period the Holders of a majority in principal
     amount of the Securities of that series do not give the Trustee a direction
     inconsistent with the request.

         A Holder may not use this Indenture to unduly prejudice the rights of
another Holder or to obtain a preference or priority over another Holder.

SECTION 6.07  Rights of Holders to Receive Payment.

         Notwithstanding any other provision of this Indenture (including,
without limitation, Section 6.06), the right of any Holder of a Security to
receive payment of principal of

                                      -41-

<PAGE>

and premium, if any, and interest on and any Additional Amounts with respect to
the Security, on or after the respective due dates expressed in the Security, or
to bring suit for the enforcement of any such payment on or after such
respective dates, is absolute and unconditional and shall not be impaired or
affected without the consent of the Holder.

         Notwithstanding any other provision of this Indenture (including,
without limitation, Section 6.06), the right of any Holder to bring suit for the
enforcement of the right to convert a convertible Security shall not be impaired
or affected without the consent of such Holder.

SECTION 6.08  Collection Suit by Trustee.

         If an Event of Default specified in clause (1) or (2) of Section 6.01
hereof occurs and is continuing, the Trustee is authorized to recover judgment
in its own name and as trustee of an express trust against the Company for the
amount of principal, premium (if any), interest and any Additional Amounts
remaining unpaid on the Securities of the series affected by the Event of
Default, and interest on overdue principal and premium, if any, and, to the
extent lawful, interest on overdue interest, and such further amount as shall be
sufficient to cover the costs and expenses of collection, including the
reasonable compensation, expenses, disbursements and advances of the Trustee,
its agents and counsel.

SECTION 6.09  Trustee May File Proofs of Claim.

         The Trustee is authorized to file such proofs of claim and other papers
or documents and to take such actions, including participating as a member,
voting or otherwise, of any committee of creditors, as may be necessary or
advisable 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 the Holders allowed in any judicial proceedings
relative to the Company or its creditors or properties and shall be entitled and
empowered to collect, receive and distribute any money or other property payable
or deliverable on any such claims and any Bankruptcy Custodian in any such
judicial proceeding is hereby authorized by each Holder 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, 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 7.07. To the extent that the payment of any such compensation, expenses,
disbursements and advances of the Trustee, its agents and counsel, and any other
amounts due the Trustee under Section 7.07 out of the estate in any such
proceeding, shall be denied for any reason, payment of the same shall be secured
by a lien on, and shall be paid out of, any and all distributions, dividends,
money, securities and other properties which the Holders of the Securities may
be entitled to receive in such proceeding whether in liquidation or under any
plan of reorganization or arrangement or otherwise. Nothing herein contained
shall be deemed to authorize the Trustee to authorize or consent to or accept or
adopt on behalf of any Holder 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 in any such proceeding.

                                      -42-

<PAGE>

SECTION 6.10  Priorities.

          If the Trustee collects any money pursuant to this Article VI, it
shall pay out the money in the following order:

          First: to the Trustee for amounts due under Section 7.07;

          Second: to Holders for amounts due and unpaid on the Securities in
     respect of which or for the benefit of which such money has been collected,
     for principal, premium (if any), interest and any Additional Amounts
     ratably, without preference or priority of any kind, according to the
     amounts due and payable on such Securities for principal, premium (if any),
     interest and any Additional Amounts, respectively; and

          Third: to the Company.

          The Trustee, upon prior written notice to the Company, may fix record
dates and payment dates for any payment to Holders pursuant to this Article VI.

          To the fullest extent allowed under applicable law, if for the purpose
of obtaining a judgment against the Company in any court it is necessary to
convert the sum due in respect of the principal of, premium (if any) or interest
on or Additional Amounts with respect to the Securities of any series (the
"Required Currency") into a currency in which a judgment will be rendered (the
"Judgment Currency"), the rate of exchange used for purposes of rendering the
judgment shall be the rate at which in accordance with normal banking procedures
the Trustee could purchase in The City of New York, New York the Required
Currency with the Judgment Currency on the Business Day in The City of New York,
New York next preceding that on which final judgment is given. Neither the
Company nor the Trustee shall be liable for any shortfall nor shall it benefit
from any windfall in payments to Holders of Securities under this Section 6.10
caused by a change in exchange rates between the time the amount of a judgment
against it is calculated as above and the time the Trustee converts the Judgment
Currency into the Required Currency to make payments under this Section to
Holders of Securities, but payment of such judgment shall discharge all amounts
owed by the Company on the claim or claims underlying such judgment.

SECTION 6.11  Undertaking for Costs.

          In any suit for the enforcement of any right or remedy under this
Indenture or in any suit against the Trustee for any action taken or omitted by
it as a trustee, a court in its discretion may require the filing by any party
litigant in the suit of an undertaking to pay the costs of the suit, and the
court in its discretion may assess reasonable costs, including reasonable
attorneys' fees, against any party litigant in the suit, having due regard to
the merits and good faith of the claims or defenses made by the party litigant.
This Section 6.11 does not apply to a suit by the Trustee a suit by a Holder
pursuant to Section 6.07, or a suit by a Holder or Holders of more than 10% in
principal amount of the then outstanding Securities of any series.

                                      -43-

<PAGE>

SECTION 6.12  Right to Pursue Remedy.

          With respect to the right of any Holder to pursue a remedy pursuant to
Section 6.06 or 6.07 hereof, the Company expressly acknowledges the right of any
beneficial holder of Securities to pursue such remedy jointly with the
registered holder of such Securities, in addition to any other right such
beneficial holder might have thereunder.

                                  ARTICLE VII

                                     TRUSTEE

SECTION 7.01  Duties of Trustee.

          (a) If 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 such exercise, as a prudent man would
exercise or use under the circumstances in the conduct of his own affairs.

          (b) Except during the continuance of an Event of Default with respect
to Securities of any series:

          (1) the Trustee need perform only those duties that are specifically
     set forth in this Indenture and no others, and no implied covenants or
     obligations shall be read into this Indenture against the Trustee; and

          (2) 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. However,
     in the case of any such certificate or opinion which by any provision of
     this Indenture is specifically required to be furnished to the Trustee, the
     Trustee shall examine such certificates and opinions to determine whether,
     on their face, they appear to conform to the requirements of this Indenture
     (but not to confirm or investigate the accuracy of mathematical
     calculations or other facts or opinions stated therein).

          (c) The Trustee may not be relieved from liabilities for its own
negligent action, its own negligent failure to act or its own willful misconduct
as adjudicated by a court of competent jurisdiction, except that:

          (1) this paragraph does not limit the effect of Section 7.01(b);

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

          (3) the Trustee shall not be liable with respect to any action it
     takes or omits to take in good faith in accordance with a direction
     received by it pursuant to Section 6.05; and

                                      -44-

<PAGE>

          (4) the Trustee shall not be liable for any incidental, indirect,
     special, consequential or punitive damages.

          (d) Whether or not therein expressly so provided, every provision of
this Indenture that in any way relates to the Trustee is subject to the
provisions of this Section 7.01. The permissive right of the Trustee to take or
refrain from taking any action enumerated in this Indenture shall not be
construed as a duty.

          (e) No provision of this Indenture shall require the Trustee to expend
or risk its own funds or incur any liability. The Trustee may refuse to perform
any duty or exercise any right or power unless it receives indemnity reasonably
satisfactory to it against any loss, liability or expense.

          (f) The Trustee shall not be liable for interest on any money received
by it except as the Trustee may agree in writing with the Company. Money held in
trust by the Trustee need not be segregated from other funds except to the
extent required by law. All money received by the Trustee shall, until applied
as herein provided, be held in trust for the payment of the principal of,
premium (if any) and interest on and Additional Amounts with respect to the
Securities.

          (g) The Trustee shall not have any responsibility for making or
verifying the accuracy of any calculations made hereunder.

SECTION 7.02  Rights of Trustee.

          (a) The Trustee may conclusively rely and shall be protected in acting
or refraining from acting on any document believed by it to be genuine and to
have been signed or presented by the proper Person. 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, securities, bond, debenture, Security, note,
other evidence of indebtedness or other paper or document, but the Trustee, in
its discretion, may make such further inquiry or investigation into such facts
or matters as it may see fit.

          (b) Before the Trustee acts or refrains from acting, it may require
instruction, an Officers' Certificate or an Opinion of Counsel or both to be
provided. The Trustee shall not be liable for any action it takes or omits to
take in good faith in reliance on such instruction, Officers' Certificate or
Opinion of Counsel. The Trustee may consult at the Company's expense with
counsel or other professional advisors of its selection and the advice of such
counsel, other professional advisors 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.

          (c) The Trustee may act through agents, at the cost of the Company,
and shall not be responsible for the actions or omissions of any agent appointed
with due care.

          (d) The Trustee shall not be liable for any action it takes or omits
to take in good faith which it believes to be authorized or within its rights or
powers conferred upon it by this Indenture.

                                      -45-

<PAGE>

          (e) Unless otherwise specifically provided in this Indenture, any
demand, request, direction or notice from the Company shall be sufficient if
signed by an Officer of the Company and any resolution of the Board of Directors
may be sufficiently evidenced by a Board Resolution.

          (f) Upon an Event of Default, the Trustee shall be entitled to require
all agents to act solely in accordance with its directions.

          (g) In all instances in which the Trustee is called upon to exercise
its discretion, such discretion shall be absolute.

          (h) In connection with the exercise of its trusts, powers, authorities
or discretions (including but not limited to those in relation to any proposed
modification, authorization or waiver), the Trustee shall have regard to the
interests of the Holders as a class and shall not have regard to the
consequences of such exercise for individual Holders (whatever their number) and
in particular but without limitation, shall not have regard for the consequences
of the exercise of its trusts, powers, authorities or discretions for individual
Holders resulting from their being, for any purpose, domiciled or resident in,
or otherwise connected with, or subject to the jurisdiction of any particular
territory and the Trustee shall not be entitled to require, nor shall any Holder
be entitled to claim, from the Company or the Trustee any indemnification or
payment in respect of any tax consequences of any such exercise upon individual
Holders.

SECTION 7.03  May Hold Securities.

          The Trustee in its individual or any other capacity may become the
owner or pledgee of Securities and it and its Affiliates may otherwise deal with
the Company or any of its Affiliates with the same rights it would have if it
were not Trustee and without being obliged to account for any profits from such
dealings. Any Agent may do the same with like rights and duties. However, the
Trustee is subject to Sections 7.10 and 7.11.

SECTION 7.04  Trustee's Disclaimer.

          The Trustee makes no representation as to the validity or adequacy of
this Indenture or the Securities, it shall not be accountable for the Company's
use of the proceeds from the Securities or any money paid to the Company or upon
the Company's direction under any provision hereof, it shall not be responsible
for the use or application of any money received by any Paying Agent other than
the Trustee and it shall not be responsible for any statement or recital herein
or any statement in the Securities other than its certificate of authentication.

SECTION 7.05  Notice of Defaults.

          If a Default or Event of Default with respect to the Securities of any
series occurs and is continuing and a Trust Officer of the Trustee responsible
for the administration of this Indenture has received written notice thereof
pursuant to the terms of this Indenture, the Trustee shall mail to Holders of
Securities of such series a notice of the Default or Event of Default within 90
days after receipt of such written notice. Except in the case of a Default or
Event of Default in payment of principal of, premium (if any) and interest on
and Additional Amounts or

                                      -46-

<PAGE>

any sinking fund installment with respect to the Securities of such series, the
Trustee may withhold the notice if and so long as a committee of its Trust
Officers in good faith determines that withholding the notice is in the
interests of Holders of Securities of such series.

SECTION 7.06  Reports by Trustee to Holders.

          Within 60 days after each May 15 of each year after the execution of
this Indenture, the Trustee shall mail to Holders of a series and the Company a
brief report dated as of such reporting date that complies with TIA ss. 313(a);
provided, however, that if no event described in TIA ss. 313(a) has occurred
within the twelve months preceding the reporting date with respect to a series,
no report need be transmitted to Holders of such series. The Trustee also shall
comply with TIA ss. 313(b). The Trustee shall also transmit by mail all reports
if and as required by TIA ss.ss. 313(c) and 313(d).

          A copy of each report at the time of its mailing to Holders of a
series of Securities shall be filed by the Company with the SEC and each
securities exchange, if any, on which the Securities of such series are listed.
The Company shall notify the Trustee if and when any series of Securities is
listed on any securities exchange.

SECTION 7.07  Compensation and Indemnity.

          The Company agrees to pay to the Trustee for its acceptance of this
Indenture and services hereunder such compensation as the Company and the
Trustee shall from time to time agree in writing. The Trustee's compensation
shall not be limited by any law on compensation of a trustee of an express
trust. The Company agrees to reimburse the Trustee upon request for all
reasonable disbursements, advances and expenses incurred by it. Such expenses
shall include the reasonable compensation, disbursements and expenses of the
Trustee's agents and counsel.

          The Company hereby indemnifies the Trustee and any predecessor
Trustee, their officers, directors, employees and agents for, and to hold them
harmless against, any loss, liability, cost, claim or expense incurred without
negligence or willful misconduct on its part, arising out of or in connection
with the acceptance or administration of the trust or trusts hereunder,
including the costs and expenses of defending themselves against any claim or
liability (whether asserted by the Company, any Holder or any other person) in
connection with the exercise or performance of any of their powers or duties
hereunder. The Trustee shall notify the Company promptly of any claim for which
it may seek indemnity. The Company shall defend the claim and the Trustee shall
cooperate in the defense. The Trustee may have separate counsel and the Company
shall pay the reasonable fees and expenses of such counsel. The Company need not
pay for any settlement made without its consent, which consent shall not be
unreasonably withheld.

          The Company shall not be obligated to reimburse any expense or
indemnify against any loss or liability incurred by the Trustee through the
Trustee's negligence or willful misconduct.

          To secure the payment obligations of the Company in this Section 7.07,
the Trustee shall have a lien prior to the Securities on all money or property
held or collected by the Trustee, except that held in trust to pay principal of,
premium (if any) and interest on and any

                                      -47-

<PAGE>

Additional Amounts with respect to Securities of any series. Such lien and the
indemnity obligation under this Section 7.07 shall survive the satisfaction and
discharge of this Indenture.

          When the Trustee incurs expenses or renders services after an Event of
Default specified in Section 6.01(7) or (8) occurs with respect to the Company,
the expenses and the compensation for the services are intended to constitute
expenses of administration under any Bankruptcy Law.

          Each and every remedy, power, right, claim, demand, cause of action,
and immunity intended by this Indenture to be exercised by or vested in the
Trustee shall be exercisable by and vested in any other role the Trustee may
serve under this Indenture.

SECTION 7.08  Replacement of Trustee.

          A resignation or removal of the Trustee and appointment of a successor
Trustee shall become effective only upon the successor Trustee's acceptance of
appointment as provided in this Section 7.08.

          The Trustee may resign and be discharged at any time with respect to
the Securities of one or more series by so notifying the Company. The Holders of
a majority in principal amount of the then outstanding Securities of any series
may remove the Trustee with respect to the Securities of such series by so
notifying the Trustee and the Company. The Company may remove the Trustee if:

          (1) the Trustee fails to comply with Section 7.10;

          (2) the Trustee is adjudged a bankrupt or an insolvent or an order for
     relief is entered with respect to the Trustee under any Bankruptcy Law;

          (3) a Bankruptcy Custodian or public officer takes charge of the
     Trustee or its property; or

          (4) the Trustee otherwise becomes incapable of acting.

          If the Trustee resigns or is removed or if a vacancy exists in the
office of Trustee for any reason, with respect to the Securities of one or more
series, the Company shall promptly appoint a successor Trustee or Trustees with
respect to the Securities of that or those series (it being understood that any
such successor Trustee may be appointed with respect to the Securities of one or
more or all of such series and that at any time there shall be only one Trustee
with respect to the Securities of any particular series). Within one year after
the successor Trustee with respect to the Securities of any series takes office,
the Holders of a majority in principal amount of the Securities of such series
then outstanding may appoint a successor Trustee to replace a successor Trustee
appointed by the Company.

          If a successor Trustee with respect to the Securities of any series
does not take office within 30 days after the retiring Trustee resigns or is
removed, the retiring Trustee, the Company or the Holders of at least 10% in
principal amount of the then outstanding Securities of

                                      -48-

<PAGE>

such series may petition any court of competent jurisdiction for the appointment
of a successor Trustee with respect to the Securities of such series.

          If the Trustee with respect to the Securities of a series fails to
comply with Section 7.10, any Holder of Securities of such series may petition
any court of competent jurisdiction for the removal of the Trustee and the
appointment of a successor Trustee with respect to the Securities of such
series.

          In case of the appointment of a successor Trustee with respect to all
Securities, each such successor Trustee shall deliver a written acceptance of
its appointment to the retiring Trustee and to the Company. Thereupon the
resignation or removal of the retiring Trustee shall become effective, and the
successor Trustee shall have all the rights, powers and duties of the retiring
Trustee under this Indenture. The successor Trustee shall mail a notice of its
succession to Holders. The retiring Trustee shall promptly transfer all property
held by it as Trustee to the successor Trustee, subject to the right to deduct
its unpaid fees and expenses and shall have no further duties or obligations
hereunder.

          In case of the appointment of a successor Trustee with respect to the
Securities of one or more (but not all) series, the Company, the retiring
Trustee and each successor Trustee with respect to the Securities of one or more
(but not all) series shall execute and deliver an indenture supplemental hereto
in which each successor Trustee shall accept such appointment and that (1) shall
confer to each successor Trustee all the rights, powers and duties of the
retiring Trustee with respect to the Securities of that or those series to which
the appointment of such successor Trustee relates, (2) if the retiring Trustee
is not retiring with respect to all Securities, shall confirm that all the
rights, powers and duties of the retiring Trustee with respect to the Securities
of that or those series as to which the retiring Trustee is not retiring shall
continue to be vested in the retiring Trustee and (3) shall add to or change any
of the provisions of this Indenture as shall be necessary to provide for or
facilitate the administration of the trusts hereunder by more than one Trustee.
Nothing herein or in such supplemental indenture shall constitute such Trustees
co-trustees of the same trust, and each such Trustee shall be trustee of a trust
or trusts hereunder separate and apart from any trust or trusts hereunder
administered by any other such Trustee. Upon the execution and delivery of such
supplemental indenture, the resignation or removal of the retiring Trustee shall
become effective to the extent provided therein and each such successor Trustee
shall have all the rights, powers and duties of the retiring Trustee with
respect to the Securities of that or those series to which the appointment of
such successor Trustee relates. On request of the Company or any successor
Trustee, such retiring Trustee shall transfer to such successor Trustee all
property held by such retiring Trustee as Trustee with respect to the Securities
of that or those series to which the appointment of such successor Trustee
relates. Such retiring Trustee shall, however, have the right to deduct its
unpaid fees and expenses, including attorneys' fees.

          Notwithstanding replacement of the Trustee or Trustees pursuant to
this Section 7.08, the obligations of the Company under Section 7.07 shall
continue for the benefit of the retiring Trustee or Trustees.

                                      -49-

<PAGE>

SECTION 7.09  Successor Trustee by Merger, etc.

          Subject to Section 7.10, if the Trustee consolidates, merges or
converts into, or transfers all or substantially all of its corporate trust
business to, another corporation, the successor corporation without any further
act shall be the successor Trustee; provided, however, that in the case of a
transfer of all or substantially all of its corporate trust business to another
corporation, the transferee corporation expressly assumes all of the Trustee's
liabilities hereunder.

          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; and in case at that time any of the
Securities shall not have been authenticated, any successor to the Trustee may
authenticate such Securities either in the name of any predecessor hereunder or
in the name of the successor to the Trustee; and in all such cases such
certificates shall have the full force which it is anywhere in the Securities or
in this Indenture provided that the certificate of the Trustee shall have.

SECTION 7.10  Eligibility; Disqualification.

          There shall at all times be a Trustee hereunder which shall be a
corporation organized and doing business under the laws of the United States,
any State thereof or the District of Columbia and authorized under such laws to
exercise corporate trust power, shall be subject to supervision or examination
by United States Federal or State (or the District of Columbia) authority and
shall have, or be a subsidiary of a bank or bank holding company having, a
combined capital and surplus of at least $50 million as set forth in its most
recent published annual report of condition.

          The Indenture shall always have a Trustee who satisfies the
requirements of TIA ss.ss. 310(a)(1), 310(a)(2) and 310(a)(5). The Trustee is
subject to and shall comply with the provisions of TIA ss. 310(b) during the
period of time required by this Indenture. Nothing in this Indenture shall
prevent the Trustee from filing with the SEC the application referred to in the
penultimate paragraph of TIA ss. 310(b).

SECTION 7.11  Preferential Collection of Claims Against Company.

          The Trustee is subject to and shall comply with the provisions of TIA
ss. 311(a), excluding any creditor relationship listed in TIA ss. 311(b). A
Trustee who has resigned or been removed shall be subject to TIA ss. 311(a) to
the extent indicated therein.

                                  ARTICLE VIII

                             DISCHARGE OF INDENTURE

SECTION 8.01  Termination of Company's Obligations.

          (a) This Indenture shall cease to be of further effect with respect to
the Securities of a series (except that the Company's obligations under Section
7.07, the Trustee's

                                      -50-

<PAGE>

and Paying Agent's obligations under Section 8.03 and the rights, powers,
protections and privileges accorded the Trustee under Article VII shall
survive), and the Trustee, on demand of the Company, shall execute proper
instruments acknowledging the satisfaction and discharge of this Indenture with
respect to the Securities of such series, when:

          (1)  either

               (A) all outstanding Securities of such series theretofore
          authenticated and issued (other than destroyed, lost or stolen
          Securities that have been replaced or paid) have been delivered to the
          Trustee for cancellation; or

               (B) all outstanding Securities of such series not theretofore
          delivered to the Trustee for cancellation:

                   (i)   have become due and payable, or

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

                   (iii) 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, in the case of clause (i), (ii) or (iii) above, the Company has
          irrevocably deposited or caused to be deposited with the Trustee as
          funds (immediately available to the Holders in the case of clause (i))
          in trust for such purpose (x) cash in an amount, or (y) Government
          Obligations, maturing as to principal and interest at such times and
          in such amounts as will ensure the availability of cash in an amount
          or (z) a combination thereof, which will be sufficient, in the opinion
          of a nationally recognized firm of independent public accountants
          expressed in a written certification thereof delivered to the Trustee,
          to pay and discharge the entire indebtedness on the Securities of such
          series for principal and interest to the date of such deposit (in the
          case of Securities which have become due and payable) or for
          principal, premium, if any, and interest to the Stated Maturity or
          Redemption Date, as the case may be; or

               (C) the Company has properly fulfilled such other means of
          satisfaction and discharge as is specified, as contemplated by Section
          2.01, to be applicable to the Securities of such series;

          (2)  the Company has paid or caused to be paid all other sums payable
     by it hereunder with respect to the Securities of such series;

          (3)  the Company has delivered to the Trustee an Officers' Certificate
     stating that all conditions precedent to satisfaction and discharge of this
     Indenture with respect to the Securities of such series have been complied
     with, together with an Opinion of Counsel to the same effect; and

                                      -51-

<PAGE>

         (4) the Company has delivered irrevocable instructions to the Trustee
     to apply the deposited money toward the payment of such Securities at the
     date of Maturity or the Redemption Date, as the case may be.

         (b) Unless this Section 8.01(b) is specified as not being applicable to
Securities of a series as contemplated by Section 2.01, the Company may
terminate certain of its obligations under this Indenture ("covenant
defeasance") with respect to the Securities of a series if:

         (1) the Company has irrevocably deposited or caused to be irrevocably
     deposited with the Trustee as trust funds in trust for the purpose of
     making the following payments, specifically pledged as security for and
     dedicated solely to the benefit of the Holders of Securities of such
     series, (i) money in the currency in which payment of the Securities of
     such series is to be made in an amount, or (ii) Government Obligations with
     respect to such series, maturing as to principal and interest at such times
     and in such amounts as will ensure the availability of money in the
     currency in which payment of the Securities of such series is to be made in
     an amount or (iii) a combination thereof, that is sufficient, in the
     opinion (in the case of (ii) and (iii)) of a nationally recognized firm of
     independent public accountants expressed in a written certification thereof
     delivered to the Trustee, to pay the principal of and premium (if any) and
     interest on all Securities of such series on each date that such principal,
     premium (if any) or interest is due and payable and (at the Stated Maturity
     thereof or upon redemption as provided in Section 8.01(e)) to pay all other
     sums payable by it hereunder; provided that the Trustee shall have been
     irrevocably instructed to apply such money and/or the proceeds of such
     Government Obligations to the payment of said principal, premium (if any)
     and interest with respect to the Securities of such series as the same
     shall become due;

         (2) the Company has delivered to the Trustee an Officers' Certificate
     stating that all conditions precedent to satisfaction and discharge of this
     Indenture with respect to the Securities of such series have been complied
     with, and an Opinion of Counsel to the same effect;

         (3) no Default or Event of Default with respect to the Securities of
     such series shall have occurred and be continuing on the date of such
     deposit;

         (4) the Company shall have delivered to the Trustee an Opinion of
     Counsel from a nationally recognized counsel acceptable to the Trustee or a
     private letter ruling issued by the United States Internal Revenue Service
     to the effect that the Holders will not recognize income, gain or loss for
     United States Federal income tax purposes as a result of the Company's
     exercise of its option under this Section 8.01(b) and will be subject to
     United States Federal income tax on the same amount and in the same manner
     and at the same times as would have been the case if such option had not
     been exercised;

         (5) the Company has complied with any additional conditions specified
     pursuant to Section 2.01 to be applicable to the discharge of Securities of
     such series pursuant to this Section 8.01; and

                                      -52-

<PAGE>

         (6) such deposit and discharge shall not cause the Trustee to have a
     conflicting interest as defined in TIAss.310(b).

         In such event, this Indenture shall cease to be of further effect
(except as set forth in this paragraph), and the Trustee, on demand of the
Company, shall execute proper instruments acknowledging satisfaction and
discharge under this Indenture. However, the Company's obligations in Sections
2.05, 2.06, 2.07, 2.08, 2.09, 4.01, 4.02, 5.01, 7.07, 7.08 and 8.04, the
Trustee's and Paying Agent's obligations in Section 8.03 and the rights, powers,
protections and privileges accorded the Trustee under Article VII shall survive
until all Securities of such series are no longer outstanding. Thereafter, only
the Company's obligations in Section 7.07 and the Trustee's and Paying Agent's
obligations in Section 8.03 shall survive with respect to Securities of such
series.

         After such irrevocable deposit made pursuant to this Section 8.01(b)
and satisfaction of the other conditions set forth herein, the Trustee upon
request shall acknowledge in writing the discharge of the Company's obligations
under this Indenture with respect to the Securities of such series except for
those surviving obligations specified above.

         In order to have money available on a payment date to pay principal of
or premium (if any) or interest on the Securities, the Government Obligations
shall be payable as to principal or interest on or before such payment date in
such amounts as will provide the necessary money. Government Obligations shall
not be callable at the issuer's option.

         (c) If the Company has previously complied or is concurrently complying
with Section 8.01(b) (other than any additional conditions specified pursuant to
Section 2.01 that are expressly applicable only to covenant defeasance) with
respect to Securities of a series, then, unless this Section 8.01(c) is
specified as not being applicable to Securities of such series as contemplated
by Section 2.01, the Company may elect to be discharged ("legal defeasance")
from its obligations to make payments with respect to Securities of such series,
if:

         (1) no Default or Event of Default under clauses (7) and (8) of Section
     6.01 hereof shall have occurred with respect to the Company at any time
     during the period ending on the 91st day after the date of deposit
     contemplated by Section 8.01(b) (it being understood that this condition
     shall not be deemed satisfied until the expiration of such period);

         (2) unless otherwise specified with respect to Securities of such
     series as contemplated by Section 2.01, the Company has delivered to the
     Trustee an Opinion of Counsel from a nationally recognized counsel
     acceptable to the Trustee to the effect referred to in Section 8.01(b)(4)
     with respect to such legal defeasance, which opinion is based on (i) a
     private ruling of the United States Internal Revenue Service addressed to
     the Company, (ii) a published ruling of the United States Internal Revenue
     Service or (iii) a change in the applicable United States Federal income
     tax law (including regulations) after the date of this Indenture;

                                      -53-

<PAGE>

         (3) the Company has complied with any other conditions specified
     pursuant to Section 2.01 to be applicable to the legal defeasance of
     Securities of such series pursuant to this Section 8.01(c); and

         (4) the Company has delivered to the Trustee a Company Request
     requesting such legal defeasance of the Securities of such series and an
     Officers' Certificate stating that all conditions precedent with respect to
     such legal defeasance of the Securities of such series have been complied
     with, together with an Opinion of Counsel to the same effect.

         In such event, the Company will be discharged from its obligations
under this Indenture and the Securities of such series to pay principal of,
premium (if any) and interest on, and any Additional Amounts with respect to,
Securities of such series, the Company's obligations under Sections 4.01, 4.02
and 5.01 shall terminate with respect to such Securities, and the entire
indebtedness of the Company evidenced by such Securities shall be deemed paid
and discharged.

         (d) If and to the extent additional or alternative means of
satisfaction, discharge or defeasance of Securities of a series are specified to
be applicable to such series as contemplated by Section 2.01, the Company may
terminate any or all of its obligations under this Indenture with respect to
Securities of a series and any or all of its obligations under the Securities of
such series if it fulfills such other means of satisfaction and discharge as may
be so specified, as contemplated by Section 2.01, to be applicable to the
Securities of such series.

         (e) If Securities of any series subject to subsections (a), (b), (c) or
(d) of this Section 8.01 are to be redeemed prior to their Stated Maturity,
whether pursuant to any optional redemption provisions or in accordance with any
mandatory or optional sinking fund provisions, the terms of the applicable trust
arrangement shall provide for such redemption, and the Company shall make such
arrangements as are reasonably satisfactory to the Trustee for the giving of
notice of redemption by the Trustee in the name, and at the expense, of the
Company.

SECTION 8.02   Application of Trust Money.

         The Trustee or a trustee satisfactory to the Trustee and the Company
shall hold in trust money or Government Obligations deposited with it pursuant
to Section 8.01 hereof. It shall apply the deposited money and the money from
Government Obligations through the Paying Agent and in accordance with this
Indenture to the payment of principal of, premium (if any) and interest on and
any Additional Amounts with respect to the Securities of the series with respect
to which the deposit was made.

SECTION 8.03   Repayment to Company.

         The Trustee and the Paying Agent shall promptly pay to the Company upon
written request any excess money or Government Obligations (or proceeds
therefrom) held by them at any time upon the written request of the Company.

         Subject to the requirements of any applicable abandoned property laws,
the Trustee and the Paying Agent shall pay to the Company upon written request
any money held by

                                      -54-

<PAGE>

them for the payment of principal, premium (if any), interest or any Additional
Amounts that remains unclaimed for two years after the date upon which such
payment shall have become due. After payment to the Company, Holders entitled to
the money must look to the Company for payment as general creditors unless an
applicable abandoned property law designates another Person, and all liability
of the Trustee and the Paying Agent with respect to such money shall cease.

SECTION 8.04   Reinstatement.

         If the Trustee or the Paying Agent is unable to apply any money or
Government Obligations deposited with respect to Securities of any series in
accordance with Section 8.01 by reason of any legal proceeding or by reason of
any order or judgment of any court or governmental authority enjoining,
restraining or otherwise prohibiting such application, the obligations of the
Company under this Indenture with respect to the Securities of such series and
under the Securities of such series shall be revived and reinstated as though no
deposit had occurred pursuant to Section 8.01 until such time as the Trustee or
the Paying Agent is permitted to apply all such money or Government Obligations
in accordance with Section 8.01; provided, however, that if the Company has made
any payment of principal of, premium (if any) or interest on or any Additional
Amounts with respect to any Securities because of the reinstatement of its
obligations, the Company shall be subrogated to the rights of the Holders of
such Securities to receive such payment from the money or Government Obligations
held by the Trustee or the Paying Agent.

                                   ARTICLE IX

                     SUPPLEMENTAL INDENTURES AND AMENDMENTS

SECTION 9.01   Without Consent of Holders.

         The Company and the Trustee may amend or supplement this Indenture or
the Securities or waive any provision hereof or thereof without the consent of
any Holder:

         (1) to cure any ambiguity, omission, defect or inconsistency;

         (2) to comply with Section 5.01;

         (3) to provide for uncertificated Securities in addition to or in place
     of certificated Securities, or to provide for the issuance of bearer
     Securities (with or without coupons);

         (4) to provide any security for any series of Securities, to add
     guarantees of any series of Securities or to add one or more additional
     obligors of any series of Securities;

         (5) to comply with any requirement in order to effect or maintain the
     qualification of this Indenture under the TIA;

                                      -55-

<PAGE>

         (6) to add to the covenants of the Company for the benefit of the
     Holders of all or any series of Securities (and if such covenants are to be
     for the benefit of less than all series of Securities, stating that such
     covenants are expressly being included solely for the benefit of such
     series), or to surrender any right or power herein conferred upon the
     Company;

         (7) to add any additional Events of Default with respect to all or any
     series of the Securities (and, if any such Event of Default is applicable
     to less than all series of Securities, specifying the series to which such
     Event of Default is applicable);

         (8) to change or eliminate any of the provisions of this Indenture;
     provided that any such change or elimination shall become effective only
     when there is no outstanding Security of any series created prior to the
     execution of such amendment or supplemental indenture that is adversely
     affected in any material respect by such change in or elimination of such
     provision;

         (9) to establish the form or terms of Securities of any series as
     permitted by Section 2.01;

         (10) to supplement any of the provisions of this Indenture to such
     extent as shall be necessary to permit or facilitate the defeasance and
     discharge of any series of Securities pursuant to Section 8.01; provided,
     however, that any such action shall not adversely affect the interest of
     the Holders of Securities of such series or any other series of Securities
     in any material respect; or

         (11) to evidence and provide for the acceptance of appointment
     hereunder by a successor Trustee with respect to the Securities of one or
     more series and to add to or change any of the provisions of this Indenture
     as shall be necessary to provide for or facilitate the administration of
     the trusts hereunder by more than one Trustee, pursuant to the requirements
     of Section 7.08.

         Upon the request of the Company, accompanied by a Board Resolution, and
upon receipt by the Trustee of the documents described in Section 9.06, the
Trustee shall, subject to Section 9.06, join with the Company in the execution
of any supplemental indenture authorized or permitted by the terms of this
Indenture and make any further appropriate agreements and stipulations that may
be therein contained.

SECTION 9.02   With Consent of Holders.

         Except as provided below in this Section 9.02, the Company and the
Trustee may amend or supplement this Indenture with the written consent
(including consents obtained in connection with a tender offer or exchange offer
for Securities of any one or more series or all series or a solicitation of
consents in respect of Securities of any one or more series or all series,
provided that in each case such offer or solicitation is made to all Holders of
then outstanding Securities of each such series (but the terms of such offer or
solicitation may vary from series to series)) of the Holders of at least a
majority in principal amount of the then outstanding Securities of all series
affected by such amendment or supplement (acting as one class).

                                      -56-

<PAGE>

         Upon the request of the Company, accompanied by a Board Resolution, and
upon the filing with the Trustee of evidence of the consent of the Holders as
aforesaid, and upon receipt by the Trustee of the documents described in Section
9.06, the Trustee shall, subject to Section 9.06, join with the Company in the
execution of such amendment or supplemental indenture.

         It shall not be necessary for the consent of the Holders under this
Section 9.02 to approve the particular form of any proposed amendment,
supplement or waiver, but it shall be sufficient if such consent approves the
substance thereof.

         The Holders of a majority in principal amount of the then outstanding
Securities of one or more series (or of all series with respect to the covenants
in Sections 4.07 and 4.08) may waive compliance in a particular instance by the
Company with any provision of this Indenture with respect to Securities of such
series (including waivers obtained in connection with a tender offer or exchange
offer for Securities of such series or a solicitation of consents in respect of
Securities of such series, provided that in each case such offer or solicitation
is made to all Holders of then outstanding Securities of such series (but the
terms of such offer or solicitation may vary from series to series)).

         However, without the consent of each Holder affected, an amendment,
supplement or waiver under this Section 9.02 may not:

         (1) reduce the amount of Securities whose Holders must consent to an
     amendment, supplement or waiver;

         (2) reduce the rate of accrual of interest or change the time for
     payment of interest, including default interest, on any Security;

         (3) reduce the principal of, premium on or any mandatory sinking fund
     payment with respect to, or change the Stated Maturity of, any Security or
     reduce the amount of the principal of an Original Issue Discount Security
     that would be due and payable upon a declaration of acceleration of the
     Maturity thereof pursuant to Section 6.02;

         (4) reduce the price (including premium, if any) payable upon the
     redemption of any Security or change the time at which any Security may or
     shall be redeemed;

         (5) change any obligation of the Company to pay Additional Amounts with
     respect to any Security;

         (6) change the coin or currency or currencies (including composite
     currencies) in which any Security or any premium, interest or Additional
     Amounts with respect thereto are payable;

         (7) impair the right to institute suit for the enforcement of any
     payment of principal of, premium (if any) or interest on or any Additional
     Amounts with respect to any Security pursuant to Sections 6.07 and 6.08,
     except as limited by Section 6.06;

                                      -57-

<PAGE>

         (8) make any change in the percentage of principal amount of Securities
     necessary to waive compliance with certain provisions of this Indenture
     pursuant to Section 6.04 or 6.07 or make any change in this sentence of
     Section 9.02;

         (9) waive a continuing Default or Event of Default in the payment of
     principal of, premium (if any) or interest on or Additional Amounts with
     respect to the Securities; or

         (10) if applicable, adversely affect the conversion rights under the
     Securities.

         A supplemental indenture that changes or eliminates any covenant or
other provision of this Indenture which has expressly been included solely for
the benefit of one or more particular series of Securities, or which modifies
the rights of the Holders of Securities of such series with respect to such
covenant or other provision, shall be deemed not to affect the rights under this
Indenture of the Holders of Securities of any other series.

         The right of any Holder to participate in any consent required or
sought pursuant to any provision of this Indenture (and the obligation of the
Company to obtain any such consent otherwise required from such Holder) may be
subject to the requirement that such Holder shall have been the Holder of record
of any Securities with respect to which such consent is required or sought as of
a date identified by the Company in a notice furnished to Holders in accordance
with the terms of this Indenture.

         After an amendment, supplement or waiver under this Section 9.02
becomes effective, the Company shall mail to the Holders of each Security
affected thereby a notice briefly describing the amendment, supplement or
waiver. Any failure of the Company to mail such notice, or any defect therein,
shall not, however, in any way impair or affect the validity of any such
amendment, supplement or waiver.

SECTION 9.03   Compliance with Trust Indenture Act.

         Every amendment or supplement to this Indenture or the Securities shall
comply in form and substance with the TIA as then in effect.

SECTION 9.04   Revocation and Effect of Consents.

         Until an amendment, supplement or waiver becomes effective, a consent
to it by a Holder is a continuing consent by the Holder and every subsequent
Holder of a Security or portion of a Security that evidences the same debt as
the consenting Holder's Security, even if notation of the consent is not made on
any Security. However, any such Holder or subsequent Holder may revoke the
consent as to his or her Security or portion of a Security if the Trustee
receives written notice of revocation before the date the amendment, supplement
or waiver becomes effective. An amendment, supplement or waiver becomes
effective in accordance with its terms and thereafter binds every Holder.

         The Company may, but shall not be obligated to, fix a record date
(which need not comply with TIA (S) 316(c)) for the purpose of determining the
Holders entitled to consent to any amendment, supplement or waiver or to take
any other action under this Indenture. If a

                                      -58-

<PAGE>

record date is fixed, then notwithstanding the provisions of the immediately
preceding paragraph, those Persons who were Holders at such record date (or
their duly designated proxies), and only those Persons, shall be entitled to
consent to such amendment, supplement or waiver or to revoke any consent
previously given, whether or not such Persons continue to be Holders after such
record date. No consent shall be valid or effective for more than 90 days after
such record date unless consents from Holders of the principal amount of
Securities required hereunder for such amendment or waiver to be effective shall
have also been given and not revoked within such 90-day period.

         After an amendment, supplement or waiver becomes effective, it shall
bind every Holder, unless it is of the type described in any of clauses (1)
through (9) of Section 9.02 hereof. In such case, the amendment, supplement or
waiver shall bind each Holder who has consented to it and every subsequent
Holder that evidences the same debt as the consenting Holder's Security.

SECTION 9.05   Notation on or Exchange of Securities.

         If an amendment or supplement changes the terms of an outstanding
Security, the Company may require the Holder of the Security to deliver it to
the Trustee. The Trustee may place an appropriate notation on the Security at
the request of the Company regarding the changed terms and return it to the
Holder. Alternatively, if the Company so determines, the Company in exchange for
the Security shall issue and the Trustee shall authenticate a new Security that
reflects the changed terms. Failure to make the appropriate notation or to issue
a new Security shall not affect the validity of such amendment or supplement.

         Securities of any series authenticated and delivered after the
execution of any amendment or supplement 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 amendment or supplement.

SECTION 9.06   Trustee to Sign Amendments, etc.

         The Trustee shall sign any amendment or supplement authorized pursuant
to this Article if the amendment or supplement does not adversely affect the
rights, duties, liabilities or immunities of the Trustee. If it does, the
Trustee may, but need not, sign it. In signing or refusing to sign such
amendment or supplement, the Trustee shall be entitled to receive, and, subject
to Section 7.01 hereof, shall be fully protected in relying upon, an Opinion of
Counsel provided at the expense of the Company as conclusive evidence that such
amendment or supplement is authorized or permitted by this Indenture, that it is
not inconsistent herewith, and that it will be valid and binding upon the
Company in accordance with its terms.

                                    ARTICLE X

                                  MISCELLANEOUS

SECTION 10.01  Trust Indenture Act Controls.

         If any provision of this Indenture limits, qualifies or conflicts with
the duties imposed by operation of TIA (S) 318(c), the imposed duties shall
control.

                                      -59-

<PAGE>

SECTION 10.02  Notices.

         Any notice or communication by the Company or the Trustee to the other
is duly given if in writing and delivered in person or mailed by first-class
mail (registered or certified, return receipt requested), telex, facsimile or
overnight air courier guaranteeing next day delivery, to the other's address:

         If to the Company:

         Schlumberger Limited
         153 East 53rd Street
         57th Floor
         New York, New York  10022
         Attention:  General Counsel
         Facsimile:  (212) 350-9401

         If to the Trustee:

         Citibank, N.A.
         111 Wall Street
         14th Floor
         New York, New York 10005
         Attention: Nancy Forte
         Facsimile: (212) 657-4009

         The Company or the Trustee by notice to the other may designate
additional or different addresses for subsequent notices or communications.

         All notices and communications shall be deemed to have been duly given:
at the time delivered by hand, if personally delivered; five Business Days after
being deposited in the mail, postage prepaid, if mailed; when answered back, if
telexed; when receipt acknowledged, if by facsimile; and the next Business Day
after timely delivery to the courier, if sent by overnight air courier
guaranteeing next day delivery.

         Any notice or communication to a Holder shall be mailed by first-class
mail, postage prepaid, to the Holder's address shown on the register kept by the
Registrar. Failure to mail a notice or communication to a Holder or any defect
in it shall not affect its sufficiency with respect to other Holders.

         If a notice or communication is mailed in the manner provided above
within the time prescribed, it is duly given, whether or not the addressee
receives it, except in the case of notice to the Trustee, it is duly given only
when received.

         If the Company mails a notice or communication to Holders, it shall
mail a copy to the Trustee and each Agent at the same time.

         All notices or communications, including without limitation notices to
the Trustee or the Company by Holders, shall be in writing, except as otherwise
set forth herein.

                                      -60-

<PAGE>

          In case by reason of the suspension of regular mail service, or by
reason of any other cause, it shall be impossible to mail any notice required by
this Indenture, then such method of notification as shall be made with the
approval of the Trustee shall constitute a sufficient mailing of such notice.

SECTION 10.03  Communication by Holders with Other Holders.

          Holders may communicate pursuant to TIA (S) 312(b) with other Holders
with respect to their rights under this Indenture or the Securities. The
Company, the Trustee, the Registrar and anyone else shall have the protection of
TIA (S) 312(c).

SECTION 10.04  Certificate and Opinion as to Conditions Precedent.

          Upon any request or application by the Company to the Trustee to take
any action under this Indenture, the Company shall, if requested by the Trustee,
furnish to the Trustee at the expense of the Company:

          (1)  an Officers' Certificate (which shall include the statements set
     forth in Section 10.05) stating that, in the opinion of the signers, all
     conditions precedent and covenants, if any, provided for in this Indenture
     relating to the proposed action have been complied with; and

          (2)  an Opinion of Counsel (which shall include the statements set
     forth in Section 10.05 hereof) stating that, in the opinion of such
     counsel, all such conditions precedent and covenants have been complied
     with.

SECTION 10.05  Statements Required in Certificate or Opinion.

          Each certificate or opinion with respect to compliance with a
condition or covenant provided for in this Indenture (other than a certificate
provided pursuant to TIA (S) 314(a)(4)) shall comply with the provisions of TIA
(S) 314(e) and shall include:

          (1)  a statement that the Person making such certificate or opinion
     has read such covenant or condition;

          (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 Person, he or she has
     made such examination or investigation as is necessary to enable him or her
     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 or not, in the opinion of such Person,
     such condition or covenant has been complied with.

                                      -61-

<PAGE>

SECTION 10.06   Rules by Trustee and Agents.

          The Trustee may make reasonable rules for action by or at a meeting of
Holders. The Registrar or the Paying Agent may make reasonable rules and set
reasonable requirements for its functions.

SECTION 10.07   Legal Holidays.

          If a payment date is a Legal Holiday at a Place of Payment, payment
may be made at that place on the next succeeding day that is not a Legal
Holiday, and no interest shall accrue for the intervening period.

SECTION 10.08   No Recourse Against Others.

          A director, officer, employee, stockholder, partner or other owner of
the Company or the Trustee, as such, shall not have any liability for any
obligations of the Company under the Securities or for any obligations of the
Company or the Trustee under this Indenture or for any claim based on, in
respect of or by reason of such obligations or their creation. Each Holder by
accepting a Security waives and releases all such liability. The waiver and
release shall be part of the consideration for the issue of Securities.

SECTION 10.09   Governing Law.

          THIS INDENTURE AND THE SECURITIES SHALL BE GOVERNED BY AND CONSTRUED
IN ACCORDANCE WITH THE LAWS OF THE STATE OF NEW YORK, WITHOUT GIVING EFFECT TO
APPLICABLE PRINCIPLES OF CONFLICTS OF LAWS TO THE EXTENT THE LAWS OF ANOTHER
JURISDICTION WOULD BE REQUIRED THEREBY.

SECTION 10.10   No Adverse Interpretation of Other Agreements.

          This Indenture may not be used to interpret another indenture, loan or
debt agreement of the Company or any other Subsidiary of the Company. Any such
indenture, loan or debt agreement may not be used to interpret this Indenture.

SECTION 10.11   Successors.

          All agreements of the Company in this Indenture and the Securities
shall bind its successors. All agreements of the Trustee in this Indenture shall
bind its successors.

SECTION 10.12   Severability.

          In case any provision in this Indenture or in the Securities shall be
invalid, illegal or unenforceable, the validity, legality and enforceability of
the remaining provisions shall, to the fullest extent permitted by applicable
law, not in any way be affected or impaired thereby.

                                      -62-

<PAGE>

SECTION 10.13   Counterpart Originals.

          The parties may sign any number of copies of this Indenture. Each
signed copy shall be an original, but all of them together represent the same
agreement.

SECTION 10.14   Table of Contents, Headings, etc.

          The table of contents, cross-reference table and headings of the
Articles and Sections of this Indenture have been inserted for convenience of
reference only, are not to be considered a part hereof and shall in no way
modify or restrict any of the terms or provisions hereof.

SECTION 10.15   Jurisdiction; Waiver.

          The Company hereby irrevocably and unconditionally submits to the
nonexclusive jurisdiction of any United States Federal or New York State court
located in the Borough of Manhattan, The City of New York, New York over any
suit, action or proceeding arising out of or relating to this Indenture or any
Security. The Company irrevocably and unconditionally waives, to the fullest
extent permitted by law, any objection which it may now or hereafter have to the
laying of the venue of any such suit, action or proceeding brought in such a
court and any claim that any such suit, action or proceeding brought in such a
court has been brought in an inconvenient forum. To the extent that the Company
has or hereafter may acquire any immunity from jurisdiction of any court or from
any legal process with respect to itself or its property, the Company
irrevocably waives such immunity in respect of its obligations hereunder or
under any Security. The Company hereby irrevocably waives, to the fullest extent
permitted by applicable law, any and all right to trial by jury in any legal
proceeding out of or relating to this Indenture, the Securities or the
transactions contemplated thereby.

          The Company hereby irrevocably waives, to the fullest extent permitted
by law, any requirement or other provision of law, rule, regulation or practice
which requires or otherwise establishes as a condition to the institution,
prosecution or completion of any suit, action or proceeding (including appeals)
arising out of or relating to this Indenture or any Security, the posting of any
bond or the furnishing, directly or indirectly, of any other security.

                                   ARTICLE XI

                               MEETINGS OF HOLDERS

SECTION 11.01   Purposes for Which Meetings May Be Called.

          A meeting of Holders 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, election, waiver or other action
provided by this Indenture to be made, given or taken by Holders and otherwise
to consider any matter affecting the interests of Holders.

                                      -63-

<PAGE>

SECTION 11.02   Call, Notice and Place of Meetings.

          The Trustee may (subject to its being indemnified to its satisfaction
against all costs and expenses thereby incurred) at any time call a meeting of
Holders for any purpose specified in Section 11.01, to be held at such time and
at such place as the Trustee shall determine. Notice of every meeting of
Holders, 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 10.02, not less than 21 nor more than 180 days prior
to the date fixed for the meeting.

          In case at any time the Company or the Holders of at least a majority
in principal amount of the then outstanding Securities (or of a series, as the
case may be) shall have requested the Trustee to call a meeting of the Holders
for any purpose specified in Section 11.01, by written request setting forth in
reasonable detail the action proposed to be taken at the meeting, and the
Trustee shall not have given 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 in the amount above
specified, as the case may be, may determine the time and the place for such
meeting and may call such meeting for such purposes by giving notice thereof to
the Trustee and as provided in the immediately preceding paragraph.

SECTION 11.03   Persons Entitled to Vote at Meetings.

          Whenever in this Indenture it is provided that the Holders of a
specified percentage in aggregate principal amount of Securities may take any
action (including the making of any demand or request, the giving of any notice,
consent or waiver or the taking of any other action), the fact that at the time
of taking any such action the Holders of such specified percentage have joined
therein may be evidenced by (1) one or more instruments of substantially similar
tenor signed by such Holders in person or by an agent or proxy duly appointed in
writing, (2) the record of Holders voting in favor thereof, either in person or
by proxies duly appointed in writing, at any meeting of the Holders duly called
and held in accordance with this Article, or (3) a combination of such
instruments and such record. Except as herein otherwise expressly provided, such
action shall become effective when such instrument or instruments or record or
both are delivered to the Trustee. Proof of execution of any instrument or of a
written appointment of any such agent or proxy shall be sufficient for purposes
of this Indenture and (subject to the requirements of the TIA and Section 7.02)
conclusive in favor of the Trustee and the Company, if made in the manner
provided in this Article.

          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, and representatives of the Trustee and its counsel and any
representatives of the Company and its counsel.

SECTION 11.04   Quorum; Action.

          One or more Persons entitled to vote a majority in principal amount of
the then outstanding Securities shall constitute a quorum.

                                      -64-

<PAGE>

          In the absence of a quorum within 30 minutes of the time appointed for
any such meeting, 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 of not less than 10 days
as determined by the chairman of the meeting prior to the adjournment of such
adjourned meeting. Notice of the reconvening of any adjourned meeting shall be
given as provided in Section 11.02, except that such notice need only be given
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 principal amount of the then outstanding
Securities which shall constitute a quorum. Any Holder who has executed an
instrument in writing appointing a person as proxy shall be deemed to be present
for the purposes of determining a quorum and be deemed to have voted; provided
that such Holder shall be considered as present or voting only with respect to
the matters covered by such instrument in writing (which may include
authorization to vote on any other matters as may come before the meeting).

          Any modifications, amendments or waivers to this Indenture or the
terms and conditions of the Securities, and the adoption of any resolution of
the Holders as provided in this Indenture, shall require the consent of the
Holders of the percentage in principal amount of the then outstanding Securities
required herein to take such action.

          Any modification, amendment or waiver approved in accordance with the
provisions of this Article shall be binding on all the Holders of Securities,
whether or not present or represented at the meeting.

SECTION 11.05   Determination of Voting Rights; Conduct and Adjournment of
                Meetings.

          Notwithstanding any other provisions of this Indenture, the Trustee
may make such reasonable regulations as it may deem advisable for any meeting of
Holders 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 11.03 and the appointment of any proxy shall be proved in
the manner specified in Section 11.03 or by having the signature of the person
executing the proxy witnessed or guaranteed by any trust company, bank or banker
to certify to the holding of Securities satisfactory to the Trustee. Such
regulations may provide that written instruments appointing proxies, regular on
their face, may be presumed valid and genuine without the proof specified in
Section 11.03 or other proof.

          The Trustee shall, by an instrument in writing, appoint a temporary
chairman of the meeting, unless the meeting shall have been called by the
Company or by Holders as provided in Section 11.02, in which case the Company or
the Holders 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 principal amount of the then outstanding Securities represented at the
meeting.

                                      -65-

<PAGE>

          No vote shall be cast or counted at any meeting in respect of any
Securities challenged as not then outstanding and ruled by the chairman of the
meeting to be not then outstanding. The chairman of the meeting shall have no
right to vote, except as a Holder of a Security or proxy.

          Any meeting of Holders duly called pursuant to Section 11.02 at which
a quorum is present may be adjourned from time to time by Persons entitled to
vote a majority in principal amount of the then outstanding Securities
represented at the meeting; and the meeting may be held as so adjourned without
further notice.

SECTION 11.06   Counting Votes and Recording Action of Meetings.

          The vote upon any resolution submitted to any meeting of Holders shall
be by written ballots on which shall be subscribed the signatures of the Holders
or of their representatives by proxy and the principal amounts and serial
numbers of the then 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 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 11.02 and, if applicable, Section 11.04. 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.

                                      -66-

<PAGE>

          IN WITNESS WHEREOF, the parties hereto have caused this Indenture to
be duly executed as of the day and year first above written.

                                    SCHLUMBERGER LIMITED

                                    By:     /s/ Michel Soublin
                                       ------------------------------------
                                    Name:       Michel Soublin
                                         ----------------------------------
                                    Title:      Treasurer
                                          ---------------------------------

                                    CITIBANK, N.A.,
                                          as Trustee

                                    By:     /s/ Nancy Forte
                                       ------------------------------------
                                    Name:       Nancy Forte
                                         ----------------------------------
                                    Title:      Assistant Vice President
                                          ---------------------------------

                                      -67-

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