Document:

REVOLVING CREDIT NOTE

$9,500,000                                               Los Angeles, California
                                                                 August 31, 2002

     FOR VALUE RECEIVED, the undersigned, HAUSER, INC., a Delaware corporation,
HAUSER TECHNICAL SERVICES, INC., a Delaware Corporation, BOTANICALS
INTERNATIONAL EXTRACTS, INC., a Delaware corporation, ZETAPHARM, INC., a New
York corporation, (collectively, the "Borrowers"), hereby jointly and severally,
unconditionally promise to pay to the order of Wells Fargo Bank, National
Association (the "Lender"), at c/o Wells Fargo Bank, N.A., 333 South Grand
Avenue, 9th Floor, Los Angeles, California 90071, or at such other place as the
holder of this Note may direct, on October 31, 2002 (the "Maturity Date") in
lawful money of the United States of America and in immediately available funds,
the principal amount of (a) NINE MILLION FIVE HUNDRED THOUSAND DOLLARS
($9,500,000), or (B) such other amount as represents the aggregate unpaid
principal amount of all Revolving Loans made by the Lender pursuant to the
Credit Agreement (referred to below). The Borrowers further agree, jointly and
severally, to pay interest on the unpaid principal amount outstanding hereunder
from time to time from the date hereof in like money at such office at a rate
per annum equal to the Prime Rate plus a margin of two percent (2%) through the
period ending August 31, 2002 and a rate per annum equal to the Prime Rate plus
a margin of four percent (4%) for the period beginning September 1, 2002.
Interest shall accrue hereunder from the date of each advance until the date of
payment, shall be calculated on the basis of a year of three hundred sixty (360)
days and shall be payable for the actual number of days elapsed (including the
first day but excluding the last day). Interest shall be payable in arrears on
the last day of each calendar month and on the Maturity Date. In the event of
any repayment or prepayment of any Loan, other than a prepayment prior to the
Maturity Date, accrued interest on the principal amount repaid or prepaid shall
be payable on the date of such repayment or prepayment.

     If any principal of or interest on any Loan or any fee or other amount
payable by the Borrowers hereunder or under the Credit Agreement is not paid
when due, whether at stated maturity, upon acceleration or otherwise, such
overdue amount shall bear interest, after as well as before judgment, at a rate
per annum equal to (i) in the case of overdue principal of any Loan, two percent
(2%) plus the rate otherwise applicable to such Loan as provided above in this
Note, or (ii) in the case of any other amount, the rate that would apply under
(i) of this paragraph if such amount constituted overdue principal.

     The holder of this Note is authorized to record on Schedule 1 annexed
hereto or on a continuation thereof the date, Type and amount of each Revolving
Loan made pursuant

<PAGE>

to the Credit Agreement, the date and amount of each payment or repayment of
principal thereof; provided, however, that the failure to make any such
recordation shall not affect the obligations of the Borrowers in respect of such
Revolving Loans.

     This Note amends, restates and replaces the Revolving Credit Note
previously issued by Borrower and referred to in the Amended and Restated Credit
Agreement by and between the Borrower and the Lender dated as of June 25, 2002,
as amended (the "Credit Agreement"), is secured as provided therein and in the
Security Documents and is subject to optional and mandatory prepayment as set
forth in the Credit Agreement.

     Upon the occurrence of any one or more of the Events of Default specified
in the Credit Agreement, all amounts then remaining unpaid on this Note shall
become, or may be declared to be, immediately due and payable, all as provided
in the Credit Agreement.

     All parties now and hereafter liable with respect to this Note, whether
maker, principal, surety, guarantor, endorser or otherwise, hereby waive
presentment, demand, protest and all other notices of any kind.

     The holder of this Note is authorized from time to time to debit any
accounts maintained by any Borrower with such holder for any and all amounts
payable by the Borrowers hereunder.

     Terms defined in the Credit Agreement are used herein with their defined
meanings unless otherwise defined herein. This Note shall be governed by, and
construed and interpreted in accordance with, the laws of the State of
California.

     This Note may be executed in counterparts (and by different parties hereto
on different counterparts), each of which shall constitute an original, but all
of which when taken together shall constitute a single contract.

<PAGE>

     IN WITNESS WHEREOF, the parties hereto have caused this Revolving Credit
Note to be duly executed by their respective authorized officers as of the day
and year first above written.

HAUSER, INC.

By:  /s/ Thomas W. Hanlon
   ----------------------------
Name:   Thomas W. Hanlon
Title:  Chief Financial Officer

HAUSER TECHNICAL SERVICES, INC.

By:  /s/ Thomas W. Hanlon
   ----------------------------
Name:   Thomas W. Hanlon
Title:  Secretary and Treasurer

BOTANICALS INTERNATIONAL EXTRACTS, INC.

By:  /s/ Thomas W. Hanlon
   ----------------------------
Name:   Thomas W. Hanlon
Title:  Chief Financial Officer

ZETAPHARM, INC.

By:  /s/ Thomas W. Hanlon
   ----------------------------
Name:   Thomas W. Hanlon
Title:  Secretary and Treasurer

<PAGE>

                                                                      SCHEDULE 1
                                                        TO REVOLVING CREDIT NOTE

                      LOANS AND PAYMENTS OF REVOLVING LOAN
                      ------------------------------------

             ==================================================
                                              Unpaid
                    Amount of               Principal
                      Loans                 Balance of
                                              Loans
                                Amount of
                                Principal              Notation
             Date                Repaid                Made By
             --------------------------------------------------

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

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

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

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

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

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

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

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

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

             ==================================================EXHIBIT 4(b)

            AMENDMENT TO THE AGREEMENT AND PLAN OF REORGANIZATION

      This Amendment (the "Amendment") to the Agreement and Plan of
Reorganization (the "Agreement"), dated as of February 8, 2002, by and between
Merrill Lynch Multi-State Municipal Series Trust, a Massachusetts business trust
("Municipal Series Trust"), on behalf of Merrill Lynch Arizona Municipal Bond
Fund, Merrill Lynch Connecticut Municipal Bond Fund, Merrill Lynch Maryland
Municipal Bond Fund, Merrill Lynch Massachusetts Municipal Bond Fund (the
"Massachusetts Fund"), Merrill Lynch Michigan Municipal Bond Fund, Merrill Lynch
Minnesota Municipal Bond Fund, Merrill Lynch North Carolina Municipal Bond Fund,
Merrill Lynch Ohio Municipal Bond Fund and Merrill Lynch Texas Municipal Bond
Fund, each a series of Municipal Series Trust, and Merrill Lynch Municipal Bond
Fund, Inc., a Maryland corporation ("Municipal Bond Fund"), on behalf of the
National Portfolio, a portfolio of Municipal Bond Fund (the "National
Portfolio"), is made and entered into as of the 16th day of July, 2002, between
Municipal Series Trust, on behalf of the Massachusetts Fund, and Municipal Bond
Fund, on behalf of the National Portfolio.

      WHEREAS, the parties to the Amendment desire to amend the Agreement to
reflect the changes set forth herein with respect to the Reorganization
involving the Massachusetts Fund and the National Portfolio as of the date
hereof;

      WHEREAS, by their execution of the Amendment, Municipal Series Trust and
Municipal Bond Fund agree to the amendments to the Agreement with respect to the
Reorganization involving the Massachusetts Fund and the National Portfolio as
set forth herein; and

      NOW, THEREFORE, in connection with the amendments to the Agreement set
forth herein and in order to reflect the mutual understanding of the parties
hereto, the undersigned hereby agree and consent as of the date hereof that:

Section 1.  Certain Defined Terms

      Capitalized terms used herein and not otherwise defined herein have the
respective meanings given to them in the Agreement.

Section 2.  Amendments

      1. The definition of "Corresponding Shares" appearing in the penultimate
paragraph of the Plan of Reorganization section of the Agreement shall be
amended with respect to the Reorganization involving the Massachusetts Fund to
refer to the shares of common stock of National Portfolio to be distributed to
the shareholders of the Massachusetts Fund as follows: (i) each holder of Class
A, Class B or Class D shares of beneficial interest of the Massachusetts Fund
will be entitled to receive shares of the same class of common stock of the
National Portfolio (e.g., Class A, Class B or Class D) as the shares of
beneficial interest of the Massachusetts Fund owned by such shareholder as of
the Valuation Time; and (ii) each holder of Class C shares of beneficial
interest of the Massachusetts Fund as of the Valuation Time will be entitled to
receive Class D shares of common stock of the National Portfolio (together, the
"Corresponding Shares").

      2. Subsection 6(a) on page 12 of the Agreement under the Section entitled
"Covenants of Municipal Bond Fund and Municipal Series Trust", Subsection 8(a)
on page 14 of the Agreement under the Section entitled "Municipal Series Trust
Conditions" and Subsection 9(a) on page 19 of the Agreement under the Section
entitled "Municipal Bond Fund Conditions" shall be amended with respect to the
Reorganization involving the Massachusetts Fund to provide that the Agreement
(including any amendments thereto) must be adopted, and the Reorganization must
be approved, by the affirmative vote of (i) the holders of two-thirds of the
shares of beneficial interest of the Massachusetts Fund issued and outstanding
and entitled to vote thereon, voting together as a single class at a special
meeting of the shareholders of the Massachusetts Fund, at or prior to the
Valuation Time, and (ii) the holders of two-thirds of the shares of beneficial
interest of each of Class B and Class D of the Massachusetts Fund issued and
outstanding and entitled to vote thereon, each class voting separately as a
single class at a special meeting of the shareholders of the Massachusetts Fund
at or prior to the Valuation Time.

<PAGE>

Section 3.  Effect on Agreement

      Except as otherwise provided in the Amendment, all other provisions of the
Agreement relating to the Reorganization involving the Massachusetts Fund and
the National Portfolio are hereby confirmed and ratified and shall remain in
full force and effect. The Amendment shall not relate to any other
Reorganization under the Agreement and shall be of no force and effect with
respect thereto.

<PAGE>

      IN WITNESS WHEREOF, this Amendment has been executed and delivered as of
the day and year first above written. This Amendment may be executed in any
number of counterparts, each of which, when executed and delivered, shall be
deemed to be an original but all such counterparts together shall constitute but
one instrument.

                            MERRILL LYNCH MUNICIPAL BOND FUND , INC. ON
                            BEHALF OF THE NATIONAL PORTFOLIO

                            By:  /s/ Donald C. Burke
                                 ---------------------------------------------
                                 Donald C. Burke, Vice President and Treasurer
Attest:

/s/ Alice A. Pellegrino
Alice A. Pellegrino, Secretary

                            MERRILL LYNCH MULTI -STATE MUNICIPAL SERIES
                            TRUST ON BEHALF OF MERRILL LYNCH
                            MASSACHUSETTS MUNICIPAL BOND FUND

                            By:  /s/ Donald C. Burke
                                 ----------------------------------------------
                                  Donald C. Burke, Vice President and Treasurer
Attest:

/s/ Alice A. Pellegrino
Alice A. Pellegrino, Secretary

Source: [{"source": "alea-institute/alea-institute/kl3m-data-edgar-agreements/train-00043-of-00352.parquet"}, [{"source": "alea-institute/alea-institute/kl3m-data-edgar-agreements/train-00043-of-00352.parquet"}]]