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                                                                     EXHIBIT 2.2

                        FIRST AMENDMENT TO WRAP AGREEMENT


     This FIRST AMENDMENT TO WRAP AGREEMENT (the "AMENDMENT"), dated as of March
28, 1997, is made and entered into by and among HERCULES INCORPORATED, a
Delaware corporation ("HERCULES"), MALLINCKRODT INC., a New York corporation
("MALLINCKRODT"), GIVAUDAN-ROURE (INTERNATIONAL) SA, a Swiss corporation
("GRI"), and ROCHE HOLDINGS, INC., a Delaware corporation ("ROCHE" and, together
with GRI, the "INTERESTED PERSONS" and each individually an "INTERESTED
PERSON").

                                    RECITALS

     A. The Owners and the Interested Persons are parties to that certain
Agreement dated as of February 4, 1997 (the "AGREEMENT"), subject and pursuant
to which the parties and their respective Affiliates intend to consummate
various transactions more particularly described in the Agreement.

     B. The parties desire to amend the Agreement to more accurately reflect the
mutual intentions of the parties with respect to certain defined terms and to
make certain other changes, all as more particularly set forth in this
Amendment.

     NOW, THEREFORE, in consideration of the premises and of the mutual
agreements, provisions and covenants contained herein, the parties hereto agree
as follows:

1.   DEFINITIONS

     Capitalized terms, when used in this Amendment and not otherwise defined,
shall have meanings ascribed thereto in the Agreement. In addition, the
definitions of "Agreement," "Current Assets," "Current Liabilities," "Long-Term
Liabilities," "Long-Term Liabilities Baseline," "Partners' Representatives,"
and "Working Capital Baseline" set forth in Sections 1.1.9, 1.1.22, 1.1.23,
1.1.62, 1.1.64, 1.1.72 and 1.1.104, respectively, shall be, and hereby are,
deleted and the following Sections 1.1.9, 1.1.22, 1.1.23, 1.1.62, 1.1.64, 1.1.72
and 1.1.104, respectively, shall be, and hereby are, inserted in their place:

          1.1.9 Agreement shall mean this Agreement, as

     amended by that certain First Amendment to Wrap Agreement dated March 28,
     1997, the Disclosure Schedule and all schedules, annexes, exhibits and
     appendices hereto.

          1.1.22 Current Assets shall mean, as of any time,

     all items, excluding deferred taxes, the current portion, if any, of the
     Investment Assets (as defined in the Partnership Agreement), any accrued
     but unpaid interest receivable on the Investment Assets and the unamortized
     portion of any capitalized costs or expenses of obtaining the Tastemaker
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     Debt or the Investment Assets, which would be classified as a current asset
     under the heading "CURRENT ASSETS" on a combined consolidated balance sheet
     of Tastemaker and Tastemaker B.V. determined and prepared in accordance
     with GAAP applied on a basis consistent with the practices and
     methodologies used in preparing the December 31, 1995 audited combined
     consolidated balance sheet of Tastemaker and Tastemaker B.V.

          1.1.23 Current Liabilities shall mean, as of any

     time, the sum of (A) the amount of accrued but unpaid interest, fees and
     other costs (but excluding principal) required to be paid to the Tastemaker
     Debt lender on the Closing Date in order to pay in full and discharge all
     of the Tastemaker Debt other than the principal thereof, and (B) all items,
     excluding deferred taxes, the Tastemaker Debt and any Tax that is the
     liability or obligation of Tastemaker, which would be classified as a
     current liability under the heading "CURRENT LIABILITIES" on a combined
     consolidated balance sheet of Tastemaker and Tastemaker B.V. determined and
     prepared in accordance with GAAP applied on a basis consistent with the
     practices and methodologies used in preparing the December 31, 1995 audited
     combined consolidated balance sheet of Tastemaker and Tastemaker B.V.;
     provided, that when determining whether any Tax is included as a Current
     Liability for purposes of calculating the Adjusted Aggregate Value, the
     principles of Treasury Regulations Section 1.1502-76(b), applied in the
     manner set forth in the Tax Annex, shall govern.

          1.1.62 Long-Term Liabilities shall mean, at any

     time, the sum of (A) the amount of accrued but unpaid interest, fees and
     other costs (but excluding principal) required to be paid to the Tastemaker
     Debt lender on the Closing Date in order to pay in full and discharge all
     of the Tastemaker Debt other than the principal thereof, and (B) the
     liabilities of the Companies (other than Current Liabilities, the long-term
     component of pension liabilities, deferred taxes, the Tastemaker Debt and
     any Tax that is a liability or obligation of Tastemaker) which would be
     classified as a liability under the heading "TOTAL LIABILITIES" on a
     combined consolidated balance sheet of Tastemaker and Tastemaker B.V.
     determined and prepared in accordance with GAAP applied on a basis
     consistent with the practices and methodologies used in preparing the
     December 31, 1995 audited combined consolidated balance sheet of Tastemaker
     and Tastemaker B.V.

          1.1.64 Long-Term Liabilities Baseline shall mean the

     total liabilities of the Companies (other than Current Liabilities, the
     long-term component of pension liabilities, deferred taxes, the Tastemaker
     Debt and any Tax that is the liability or obligation of Tastemaker) which
     were classified as a liability under the heading "TOTAL LIABILITIES" on the
     June 28, 1996 unaudited combined consolidated balance sheet
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     of Tastemaker and Tastemaker B.V. and their respective subsidiaries, which
     was an amount equal to Thirty Eight Million Four Hundred Fifty Thousand
     Twenty-Four Dollars ($38,450,024.00) plus any Tax on such balance sheet
     that is a long-term liability of Tastemaker.

          1.1.72 Partners' Representatives shall mean Israel Floyd, George 
     MacKenzie, M.G. Nichols and T.D. Meier.

          1.1.104 Working Capital Baseline shall mean the Net Working Capital 
     of the Companies on the June 28, 1996 unaudited combined consolidated
     balance sheet of Tastemaker and Tastemaker B.V., which was an amount equal
     to Seventy- Seven Million Seven Hundred Six Thousand Nine Hundred Thirteen
     Dollars ($77,706,913.00), plus any Tax on such balance sheet that is a
     current liability of Tastemaker.

2.   EFFECT OF AMENDMENT

     Except as expressly set forth herein, the Agreement is unchanged and in
full force and effect, and the parties hereby ratify and confirm the Agreement
as amended hereby. The parties further agree that all references to the
Agreement in the Transaction Documents, the D&F Transaction Agreements, the
Fries Withdrawal Documents (as defined in the Partnership Agreement) and any
other certificates, documents, instruments or agreements entered into pursuant
thereto or delivered in connection therewith shall be deemed to mean and refer
to the Agreement, as amended by this Amendment.

3.   CONSENT OF OTHERS

     By signing in the spaces provided below, each of Givaudan- Roure (United
States), Inc., Tastemaker, Hercules Flavor, Inc., Hercules Credit, Inc. and
Fries & Fries, Inc. consent to this Amendment and to the effect hereof on the
Contribution Agreement and the Fries Withdrawal Documents (as defined in the
Partnership Agreement).
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          IN WITNESS WHEREOF, the parties have caused this Amendment to be
executed as of the date and year first written above.

GIVAUDAN-ROURE (INTERNATIONAL) SA    HERCULES INCORPORATED 

By_______________________            By_______________________
Name_____________________            Name_____________________
Title____________________            Title____________________

ROCHE HOLDINGS, INC.                 MALLINCKRODT INC.

By_______________________            By_______________________
Name_____________________            Name_____________________
Title____________________            Title____________________

CONSENTED BY:

GIVAUDAN-ROURE (INTERNATIONAL) SA    TASTEMAKER

By_______________________            By_______________________
Name_____________________            Name_____________________
Title____________________            Title____________________

HERCULES FLAVOR, INC.                FRIES & FRIES, INC.

By_______________________            By_______________________
Name_____________________            Name_____________________
Title____________________            Title____________________

HERCULES CREDIT, INC.

By_______________________
Name_____________________
Title____________________