CRESCENDO PHARMACEUTICALS CORP
SC 13G/A, 2000-02-14
PHARMACEUTICAL PREPARATIONS
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<PAGE>   1
                                  SCHEDULE 13G

                                 (RULE 13d-102)

 Information to be Included in Statements Filed Pursuant to Rule 13d-1(b), (c)
          and (d) and Amendments Thereto Filed Pursuant to Rule 13d-2.



                       SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, DC 20549

                                  SCHEDULE 13G

                    Under the Securities Exchange Act of 1934
                               (Amendment No. 2)*

                     CRESCENDO PHARMACEUTICALS CORPORATION.
- --------------------------------------------------------------------------------
                              (Name of Issuer)

                 CLASS A COMMON STOCK, $.01 PAR VALUE PER SHARE
- --------------------------------------------------------------------------------
                       (Title of Class of Securities)

                                   225637 107
- --------------------------------------------------------------------------------
                                 (CUSIP Number)

                               DECEMBER 31, 1999
- --------------------------------------------------------------------------------

            (Date of Event Which Requires Filing of this Statement)

         Check the appropriate box to designate the rule pursuant to which this
Schedule is filed:

                  [ ]    Rule 13d-1(b)

                  [X]    Rule 13d-1(c)

                  [ ]    Rule 13d-1(d)

         *The remainder of this cover page shall be filled out for a reporting
person's initial filing on this form with respect to the subject class of
securities, and for any subsequent amendment containing information which would
alter the disclosures provided in a prior cover page.

         The information required in the remainder of this cover page shall not
be deemed to be "filed" for the purpose of Section 18 of the Securities Exchange
Act of 1934 ("Act") or otherwise subject to the liabilities of that section of
the Act, but shall be subject to all other provisions of the Act (however, see
the Notes).


<PAGE>   2


CUSIP NO. 225637 107                  13G                      PAGE 2 OF 8 PAGES
- --------------------------------------------------------------------------------
  1     Names of Reporting Persons/I.R.S. Identification Nos. of Above Persons
        (Entities Only)

        WOODBOURNE PARTNERS, L.P.
- --------------------------------------------------------------------------------
  2     Check the Appropriate Box if a Member of a Group     (a) [ ]
        (See Instructions)                                   (b) [ ]


- --------------------------------------------------------------------------------
  3     SEC Use Only


- --------------------------------------------------------------------------------
  4     Citizenship or Place of Organization

        MISSOURI
- --------------------------------------------------------------------------------
    Number of
                           5       Sole Voting Power

      Shares                       -0-
                           -----------------------------------------------------
   Beneficially            6       Shared Voting Power

                                   -0-
     Owned by              -----------------------------------------------------
                           7       Sole Dispositive Power

       Each                        -0-
                           -----------------------------------------------------
     Reporting             8       Shared Dispositive Power


    Person With                    -0-
- --------------------------------------------------------------------------------
  9     Aggregate Amount Beneficially Owned by Each Reporting Person

        906,100
- --------------------------------------------------------------------------------
 10     Check if the Aggregate Amount in Row (9) Excludes Certain Shares [ ]
        (See Instructions) [ ]


- --------------------------------------------------------------------------------
 11     Percent of Class Represented by Amount in Row (9)

        18.4%
- --------------------------------------------------------------------------------
 12     Type of Reporting Person (See Instructions)

        PN
- --------------------------------------------------------------------------------


<PAGE>   3


CUSIP NO. 225637 107                  13G                      PAGE 3 OF 8 PAGES
- --------------------------------------------------------------------------------
  1     Names of Reporting Persons/I.R.S. Identification Nos. of Above Persons
        (Entities Only)

        FORSYTH JOINT VENTURE
- --------------------------------------------------------------------------------
  2     Check the Appropriate Box if a Member of a Group     (a) [ ]
        (See Instructions)                                   (b) [ ]


- --------------------------------------------------------------------------------
  3     SEC Use Only


- --------------------------------------------------------------------------------
  4     Citizenship or Place of Organization

        MISSOURI
- --------------------------------------------------------------------------------
    Number of
                           5       Sole Voting Power

      Shares                       -0-
                           -----------------------------------------------------
   Beneficially            6       Shared Voting Power

                                   -0-
     Owned by              -----------------------------------------------------
                           7       Sole Dispositive Power

       Each                        -0-
                           -----------------------------------------------------
     Reporting             8       Shared Dispositive Power


    Person With                    -0-
- --------------------------------------------------------------------------------
  9     Aggregate Amount Beneficially Owned by Each Reporting Person

        50,000
- --------------------------------------------------------------------------------
 10     Check if the Aggregate Amount in Row (9) Excludes Certain Shares [ ]
        (See Instructions) [ ]


- --------------------------------------------------------------------------------
 11     Percent of Class Represented by Amount in Row (9)

        1.0%
- --------------------------------------------------------------------------------
 12     Type of Reporting Person (See Instructions)

        OO
- --------------------------------------------------------------------------------


<PAGE>   4


CUSIP NO. 225637 107                  13G                      PAGE 4 OF 8 PAGES
- --------------------------------------------------------------------------------
  1     Names of Reporting Persons/I.R.S. Identification Nos. of Above Persons
        (Entities Only)

        CLAYTON MANAGEMENT COMPANY
- --------------------------------------------------------------------------------
  2     Check the Appropriate Box if a Member of a Group     (a) [ ]
        (See Instructions)                                   (b) [ ]


- --------------------------------------------------------------------------------
  3     SEC Use Only


- --------------------------------------------------------------------------------
  4     Citizenship or Place of Organization

        MISSOURI
- --------------------------------------------------------------------------------
    Number of
                           5       Sole Voting Power

      Shares                       956,100
                           -----------------------------------------------------
   Beneficially            6       Shared Voting Power

                                   -0-
     Owned by              -----------------------------------------------------
                           7       Sole Dispositive Power

       Each                        956,100
                           -----------------------------------------------------
     Reporting             8       Shared Dispositive Power

                                   -0-
    Person With
- --------------------------------------------------------------------------------
  9     Aggregate Amount Beneficially Owned by Each Reporting Person

        956,100
- --------------------------------------------------------------------------------
 10     Check if the Aggregate Amount in Row (9) Excludes Certain Shares [ ]
        (See Instructions)


- --------------------------------------------------------------------------------
 11     Percent of Class Represented by Amount in Row (9)

        19.4%
- --------------------------------------------------------------------------------
 12     Type of Reporting Person (See Instructions)

        CO
- --------------------------------------------------------------------------------


<PAGE>   5


CUSIP NO. 225637 107                  13G                      PAGE 5 OF 8 PAGES
- --------------------------------------------------------------------------------
  1     Names of Reporting Persons/I.R.S. Identification Nos. of Above Persons
        (Entities Only)

        JOHN D. WEIL
- --------------------------------------------------------------------------------
  2     Check the Appropriate Box if a Member of a Group     (a) [ ]
        (See Instructions)                                   (b) [ ]


- --------------------------------------------------------------------------------
  3     SEC Use Only


- --------------------------------------------------------------------------------
  4     Citizenship or Place of Organization

        MISSOURI
- --------------------------------------------------------------------------------
    Number of
                           5       Sole Voting Power

      Shares                       956,100
                           -----------------------------------------------------
   Beneficially            6       Shared Voting Power

                                   -0-
     Owned by              -----------------------------------------------------
                           7       Sole Dispositive Power

       Each                        956,100
                           -----------------------------------------------------
     Reporting             8       Shared Dispositive Power


    Person With                    -0-
- --------------------------------------------------------------------------------
  9     Aggregate Amount Beneficially Owned by Each Reporting Person

        956,100
- --------------------------------------------------------------------------------
 10     Check if the Aggregate Amount in Row (9) Excludes Certain Shares [ ]
        (See Instructions)


- --------------------------------------------------------------------------------
 11     Percent of Class Represented by Amount in Row (9)

        19.4%
- --------------------------------------------------------------------------------
 12     Type of Reporting Person (See Instructions)

        IN
- --------------------------------------------------------------------------------


<PAGE>   6
- --------------------------------------------------------------------------------
CUSIP No. 225637 10 7                       13G                Page 6 of 8 Pages
- --------------------------------------------------------------------------------

                         AMENDMENT NO. 2 TO SCHEDULE 13G

         The Reporting Person reported the acquisition of shares of Class A
Common Stock, par value $.01 per share ("Stock"), of Crescendo Pharmaceuticals
Corporation, a Delaware corporation ("Issuer"),1454 Page Mill Road, Palo Alto,
California 94304, in an initial filing of this Schedule 13G on March 6, 1998, as
amended by Amendment No. 1 filed on February 16, 1999. In this regard, Item 4 is
hereby amended as follows. All other items are unchanged from the initial
filing.

ITEM 4.           Ownership.

<TABLE>
<CAPTION>

                                                WOODBOURNE        FORSYTH        CLAYTON          WEIL
                                                ----------        -------        -------          ----
<S>                                             <C>              <C>           <C>             <C>
(a)   Amount beneficially owned:                  906,100          50,000        956,100         956,100

(b)   Percent of Class:                            18.4%            1.0%          19.4%           19.4%

(c)   Number of Shares as to which the person has:

      (i)   Sole power to vote or direct
            the vote:                               -0-             -0-          956,100         956,100

      (ii)  Shared power to vote or direct
            the vote:                               -0-             -0-            -0-             -0-

      (iii) Sole power to dispose or to
            direct the disposition of:              -0-             -0-          956,100         956,100

      (iv)  Shared power to dispose or to direct
            the disposition of:                     -0-             -0-            -0-             -0-
</TABLE>



<PAGE>   7
- --------------------------------------------------------------------------------
CUSIP No. 225637 10 7                       13G                Page 7 of 8 Pages
- --------------------------------------------------------------------------------



ITEM 10.    Certification.

      By signing below I certify that, to the best of my knowledge and belief,
the securities referred to above were not acquired and are not held for the
purpose of or with the effect of changing or influencing the control of the
issuer of the securities and were not acquired and are not held in connection
with or as a participant in any transaction having that purpose or effect.

      Dated:    February 14, 2000                WOODBOURNE PARTNERS, L.P.,

                                                 by its General Partner, CLAYTON
                                                 MANAGEMENT COMPANY


                                                        /s/ John D. Weil
                                                 -------------------------------
                                                 John D. Weil, President


      Dated:    February 14, 2000                FORSYTH JOINT VENTURE,

                                                 by its Manager, CLAYTON
                                                 MANAGEMENT COMPANY


                                                         /s/ John D. Weil
                                                 -------------------------------
                                                 John D. Weil, President



      Dated:    February 14, 2000                CLAYTON MANAGEMENT COMPANY


                                                         /s/ John D. Weil
                                                 -------------------------------
                                                 John D. Weil, President




      Dated:    February 14, 2000                        /s/ John D. Weil
                                                 -------------------------------
                                                 John D. Weil



<PAGE>   8
- --------------------------------------------------------------------------------
CUSIP No. 225637 10 7                       13G                Page 8 of 8 Pages
- --------------------------------------------------------------------------------



                            EXHIBIT A TO SCHEDULE 13G

                     AGREEMENT PURSUANT TO RULE 13d-1(k)(1)

      The undersigned persons, on February 14, 2000, agree and consent to the
joint filing on their behalf of this Amendment No. 2 to Schedule 13G in
connection with their beneficial ownership of the Class A Common Stock of
Crescendo Pharmaceuticals Corporation.

                                                 WOODBOURNE PARTNERS, L.P.,

                                                 by its General Partner, CLAYTON
                                                 MANAGEMENT COMPANY


                                                         /s/ John D. Weil
                                                 -------------------------------
                                                 John D. Weil, President

                                                 WOODBOURNE PARTNERS, L.P.,

                                                 by its Manager, CLAYTON
                                                 MANAGEMENT COMPANY


                                                         /s/ John D. Weil
                                                 -------------------------------
                                                 John D. Weil, President



                                                 CLAYTON MANAGEMENT COMPANY


                                                         /s/ John D. Weil
                                                 -------------------------------
                                                 John D. Weil, President



                                                         /s/ John D. Weil
                                                 -------------------------------
                                                 John D. Weil




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