SHAMAN PHARMACEUTICALS INC
SC 13G/A, 2000-02-14
PHARMACEUTICAL PREPARATIONS
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                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549

                                  Schedule 13G
                                 (Rule 13d-102)

        INFORMATION TO BE INCLUDED IN STATEMENTS FILED PURSUANT TO RULES
   13d-1 (b), (c) AND (d) AND AMENDMENTS THERETO FILED PURSUANT TO 13d-2 (b)
                               (Amendment No. 1)*


                          Shaman Pharmaceuticals, Inc.
- --------------------------------------------------------------------------------
                                (Name of Issuer)

                                  Common Stock
- --------------------------------------------------------------------------------
                         (Title of Class of Securities)

                                    81931940
- --------------------------------------------------------------------------------
                                 (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)

          [ ]     Rule 13d-1(c)

          [X]     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
disclosures provided in a prior cover page.

The information required on 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).

                         (Continued on following pages)

                               Page 1 of 14 Pages



<PAGE>


<TABLE>
<CAPTION>
- ------------------------------------                                           --------------------------------------
CUSIP No. 81931940                                     13 G                              Page 2 of 14 Pages
- ------------------------------------                                           --------------------------------------

- ------------ ---------------------------------------------------------------------------------------------------------
<S>          <C>
1            NAME OF REPORTING
             SS OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON
                      Delphi Ventures I, L.P. ("DV I")
                      Tax ID Number:
- ------------ ---------------------------------------------------------------------------------------------------------
2            CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*
                                                                                    (a)  [ ]     (b)  [X]
- ------------ ---------------------------------------------------------------------------------------------------------
3            SEC USE ONLY
- ------------ ---------------------------------------------------------------------------------------------------------
4            CITIZENSHIP OR PLACE OF ORGANIZATION
             Delaware
- ------------ ---------------------------------------------------------------------------------------------------------
                                     5        SOLE VOTING POWER
                NUMBER OF                     0 shares.
                 SHARES              -------- ------------------------------------------------------------------------
              BENEFICIALLY           6        SHARED VOTING POWER
             OWNED BY EACH                    See response to row 5.
               REPORTING             -------- ------------------------------------------------------------------------
                PERSON               7        SOLE DISPOSITIVE POWER
                 WITH                         0 shares.
                                     -------- ------------------------------------------------------------------------
                                     8        SHARED DISPOSITIVE POWER
                                              See response to row 7.
- ------------------------------------ -------- ------------------------------------------------------------------------
9            AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH
             REPORTING PERSON                                                                       0
- ------------ ---------------------------------------------------------------------------------------------------------
10           CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9)
             EXCLUDES CERTAIN SHARES*                                                               [ ]
- ------------ ---------------------------------------------------------------------------------------------------------
11           PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9
                                                                                                    0%
- ------------ ---------------------------------------------------------------------------------------------------------
12           TYPE OF REPORTING PERSON*
                                                                                                    PN
- ------------ ---------------------------------------------------------------------------------------------------------
<FN>
                                        * SEE INSTRUCTIONS BEFORE FILLING OUT!
</FN>
</TABLE>

<PAGE>


<TABLE>
<CAPTION>
- ------------------------------------                                           --------------------------------------
CUSIP No. 81931940                                     13 G                              Page 3 of 14 Pages
- ------------------------------------                                           --------------------------------------

- ------------ ---------------------------------------------------------------------------------------------------------
<S>          <C>
1            NAME OF REPORTING
             SS OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON
                      Delphi BioInvestments I, L.P. ("DBI I")
                      Tax ID Number:
- ------------ ---------------------------------------------------------------------------------------------------------
2            CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*
                                                                                    (a)  [ ]     (b)  [X]
- ------------ ---------------------------------------------------------------------------------------------------------
3            SEC USE ONLY
- ------------ ---------------------------------------------------------------------------------------------------------
4            CITIZENSHIP OR PLACE OF ORGANIZATION
             Delaware
- ------------ ---------------------------------------------------------------------------------------------------------
                                     5        SOLE VOTING POWER
                NUMBER OF                     0 shares.
                 SHARES              -------- ------------------------------------------------------------------------
              BENEFICIALLY           6        SHARED VOTING POWER
             OWNED BY EACH                    See response to row 5.
               REPORTING             -------- ------------------------------------------------------------------------
                PERSON               7        SOLE DISPOSITIVE POWER
                 WITH                         0 shares.
                                     -------- ------------------------------------------------------------------------
                                     8        SHARED DISPOSITIVE POWER
                                              See response to row 7.
- ------------------------------------ -------- ------------------------------------------------------------------------
9            AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH
             REPORTING PERSON                                                                       0
- ------------ ---------------------------------------------------------------------------------------------------------
10           CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9)
             EXCLUDES CERTAIN SHARES*                                                               [ ]
- ------------ ---------------------------------------------------------------------------------------------------------
11           PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9
                                                                                                    0%
- ------------ ---------------------------------------------------------------------------------------------------------
12           TYPE OF REPORTING PERSON*
                                                                                                    PN
- ------------ ---------------------------------------------------------------------------------------------------------
<FN>
                                        * SEE INSTRUCTIONS BEFORE FILLING OUT!
</FN>
</TABLE>

<PAGE>

<TABLE>
<CAPTION>
- ------------------------------------                                           --------------------------------------
CUSIP No. 81931940                                     13 G                              Page 4 of 14 Pages
- ------------------------------------                                           --------------------------------------

- ------------ ---------------------------------------------------------------------------------------------------------
<S>          <C>
1            NAME OF REPORTING
             SS OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON
                      Delphi Ventures II, L.P. ("DV II")
                      Tax ID Number:
- ------------ ---------------------------------------------------------------------------------------------------------
2            CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*
                                                                                    (a)  [ ]     (b)  [X]
- ------------ ---------------------------------------------------------------------------------------------------------
3            SEC USE ONLY
- ------------ ---------------------------------------------------------------------------------------------------------
4            CITIZENSHIP OR PLACE OF ORGANIZATION
             Delaware
- ------------------------------------ -------- ------------------------------------------------------------------------
                                     5        SOLE VOTING POWER
                NUMBER OF                     0 shares.
                 SHARES              -------- ------------------------------------------------------------------------
              BENEFICIALLY           6        SHARED VOTING POWER
             OWNED BY EACH                    See response to row 5.
               REPORTING             -------- ------------------------------------------------------------------------
                PERSON               7        SOLE DISPOSITIVE POWER
                 WITH                         0 shares.
                                     -------- ------------------------------------------------------------------------
                                     8        SHARED DISPOSITIVE POWER
                                              See response to row 7.
- ------------------------------------ -------- ------------------------------------------------------------------------
9            AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH
             REPORTING PERSON                                                                       0
- ------------ ---------------------------------------------------------------------------------------------------------
10           CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9)
             EXCLUDES CERTAIN SHARES*                                                               [ ]
- ------------ ---------------------------------------------------------------------------------------------------------
11           PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9
                                                                                                    0%
- ------------ ---------------------------------------------------------------------------------------------------------
12           TYPE OF REPORTING PERSON*
                                                                                                    PN
- ------------ ---------------------------------------------------------------------------------------------------------
<FN>
                                        * SEE INSTRUCTIONS BEFORE FILLING OUT!
</FN>
</TABLE>

<PAGE>


<TABLE>
<CAPTION>
- ------------------------------------                                           --------------------------------------
CUSIP No. 81931940                                     13 G                              Page 5 of 14 Pages
- ------------------------------------                                           --------------------------------------

- ------------ ---------------------------------------------------------------------------------------------------------
<S>          <C>
1            NAME OF REPORTING
             SS OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON
                      Delphi BioInvestments II, L.P. ("DBI II")
                      Tax ID Number:
- ------------ ---------------------------------------------------------------------------------------------------------
2            CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*
                                                                                    (a)  [ ]     (b)  [X]
- ------------ ---------------------------------------------------------------------------------------------------------
3            SEC USE ONLY
- ------------ ---------------------------------------------------------------------------------------------------------
4            CITIZENSHIP OR PLACE OF ORGANIZATION
             Delaware
- ------------------------------------ -------- ------------------------------------------------------------------------
                                     5        SOLE VOTING POWER
                NUMBER OF                     0 shares.
                 SHARES              -------- ------------------------------------------------------------------------
              BENEFICIALLY           6        SHARED VOTING POWER
             OWNED BY EACH                    See response to row 5.
               REPORTING             -------- ------------------------------------------------------------------------
                PERSON               7        SOLE DISPOSITIVE POWER
                 WITH                         0 shares.
                                     -------- ------------------------------------------------------------------------
                                     8        SHARED DISPOSITIVE POWER
                                              See response to row 7.
- ------------------------------------ -------- ------------------------------------------------------------------------
9            AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH
             REPORTING PERSON                                                                       0
- ------------ ---------------------------------------------------------------------------------------------------------
10           CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9)
             EXCLUDES CERTAIN SHARES*                                                               [ ]
- ------------ ---------------------------------------------------------------------------------------------------------
11           PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9
                                                                                                    0%
- ------------ ---------------------------------------------------------------------------------------------------------
12           TYPE OF REPORTING PERSON*
                                                                                                    PN
- ------------ ---------------------------------------------------------------------------------------------------------
<FN>
                                        * SEE INSTRUCTIONS BEFORE FILLING OUT!
</FN>
</TABLE>


<PAGE>

<TABLE>
<CAPTION>
- ------------------------------------                                           --------------------------------------
CUSIP No. 81931940                                     13 G                              Page 6 of 14 Pages
- ------------------------------------                                           --------------------------------------

- ------------ ---------------------------------------------------------------------------------------------------------
<S>          <C>
1            NAME OF REPORTING
             SS OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON
                      Delphi Management Partners I, L.P. ("DMP I")
                      Tax ID Number:
- ------------ ---------------------------------------------------------------------------------------------------------
2            CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*
                                                                                    (a)  [ ]     (b)  [X]
- ------------ ---------------------------------------------------------------------------------------------------------
3            SEC USE ONLY
- ------------ ---------------------------------------------------------------------------------------------------------
4            CITIZENSHIP OR PLACE OF ORGANIZATION
             Delaware
- ------------------------------------ -------- ------------------------------------------------------------------------
                                     5        SOLE VOTING POWER
                NUMBER OF                     0 shares.
                 SHARES              -------- ------------------------------------------------------------------------
              BENEFICIALLY           6        SHARED VOTING POWER
             OWNED BY EACH                    0 shares.
               REPORTING             -------- ------------------------------------------------------------------------
                PERSON               7        SOLE DISPOSITIVE POWER
                 WITH                         0 shares.
                                     -------- ------------------------------------------------------------------------
                                     8        SHARED DISPOSITIVE POWER
                                              0 shares.
- ------------------------------------ -------- ------------------------------------------------------------------------
9            AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH
             REPORTING PERSON                                                                       0
- ------------ ---------------------------------------------------------------------------------------------------------
10           CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9)
             EXCLUDES CERTAIN SHARES*                                                               [ ]
- ------------ ---------------------------------------------------------------------------------------------------------
11           PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9
                                                                                                    0%
- ------------ ---------------------------------------------------------------------------------------------------------
12           TYPE OF REPORTING PERSON*
                                                                                                    PN
- ------------ ---------------------------------------------------------------------------------------------------------
<FN>
                                        * SEE INSTRUCTIONS BEFORE FILLING OUT!
</FN>
</TABLE>


<PAGE>



<TABLE>
<CAPTION>
- ------------------------------------                                           --------------------------------------
CUSIP No. 81931940                                     13 G                              Page 7 of 14 Pages
- ------------------------------------                                           --------------------------------------

- ------------ ---------------------------------------------------------------------------------------------------------
<S>          <C>
1            NAME OF REPORTING
             SS OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON
                      Delphi Management Partners II, L.P. ("DMP II")
                      Tax ID Number:
- ------------ ---------------------------------------------------------------------------------------------------------
2            CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*
                                                                                    (a)  [ ]     (b)  [X]
- ------------ ---------------------------------------------------------------------------------------------------------
3            SEC USE ONLY
- ------------ ---------------------------------------------------------------------------------------------------------
4            CITIZENSHIP OR PLACE OF ORGANIZATION
             Delaware
- ------------------------------------ -------- ------------------------------------------------------------------------
                                     5        SOLE VOTING POWER
               NUMBER OF                      0 shares.
                SHARES               -------- ------------------------------------------------------------------------
             BENEFICIALLY            6        SHARED VOTING POWER
            OWNED BY EACH                     0 shares.
              REPORTING              -------- ------------------------------------------------------------------------
               PERSON                7        SOLE DISPOSITIVE POWER
                WITH                          0 shares.
                                     -------- ------------------------------------------------------------------------
                                     8        SHARED DISPOSITIVE POWER
                                              0 shares.
- ------------------------------------ -------- ------------------------------------------------------------------------
9            AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH
             REPORTING PERSON                                                                       0
- ------------ ---------------------------------------------------------------------------------------------------------
10           CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9)
             EXCLUDES CERTAIN SHARES*                                                               [ ]
- ------------ ---------------------------------------------------------------------------------------------------------
11           PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9
                                                                                                    0%
- ------------ ---------------------------------------------------------------------------------------------------------
12           TYPE OF REPORTING PERSON*
                                                                                                    PN
- ------------ ---------------------------------------------------------------------------------------------------------
<FN>
                                        * SEE INSTRUCTIONS BEFORE FILLING OUT!
</FN>
</TABLE>


<PAGE>


<TABLE>
<CAPTION>
- ------------------------------------                                           --------------------------------------
CUSIP No. 81931940                                     13 G                              Page 8 of 14 Pages
- ------------------------------------                                           --------------------------------------

- ------------ ---------------------------------------------------------------------------------------------------------
<S>          <C>
1            NAME OF REPORTING
             SS OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON
                      James R. Bochnowski ("Bochnowski")
                      Tax ID Number:
- ------------ ---------------------------------------------------------------------------------------------------------
2            CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*
                                                                                    (a)  [ ]     (b)  [X]
- ------------ ---------------------------------------------------------------------------------------------------------
3            SEC USE ONLY
- ------------ ---------------------------------------------------------------------------------------------------------
4            CITIZENSHIP OR PLACE OF ORGANIZATION
             U.S. Citizen
- ------------------------------------ -------- ------------------------------------------------------------------------
                                     5        SOLE VOTING POWER
               NUMBER OF                      0 shares.
                SHARES               -------- ------------------------------------------------------------------------
             BENEFICIALLY            6        SHARED VOTING POWER
            OWNED BY EACH                     0 shares.
              REPORTING              -------- ------------------------------------------------------------------------
               PERSON                7        SOLE DISPOSITIVE POWER
                WITH                          0 shares.
                                     -------- ------------------------------------------------------------------------
                                     8        SHARED DISPOSITIVE POWER
                                              0 shares.
- ------------------------------------ -------- ------------------------------------------------------------------------
9            AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH
             REPORTING PERSON                                                                       0
- ------------ ---------------------------------------------------------------------------------------------------------
10           CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9)
             EXCLUDES CERTAIN SHARES*                                                               [ ]
- ------------ ---------------------------------------------------------------------------------------------------------
11           PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9
                                                                                                    0%
- ------------ ---------------------------------------------------------------------------------------------------------
12           TYPE OF REPORTING PERSON*                                                              IN
- ------------ ---------------------------------------------------------------------------------------------------------
<FN>
                                        * SEE INSTRUCTIONS BEFORE FILLING OUT!
</FN>
</TABLE>


<PAGE>



<TABLE>
<CAPTION>
- ------------------------------------                                           --------------------------------------
CUSIP No. 81931940                                     13 G                              Page 9 of 14 Pages
- ------------------------------------                                           --------------------------------------

- ------------ ---------------------------------------------------------------------------------------------------------
<S>          <C>
1            NAME OF REPORTING
             SS OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON
                      David Douglass ("Douglass")
                      Tax ID Number:
- ------------ ---------------------------------------------------------------------------------------------------------
2            CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*
                                                                                    (a)  [ ]     (b)  [X]
- ------------ ---------------------------------------------------------------------------------------------------------
3            SEC USE ONLY
- ------------ ---------------------------------------------------------------------------------------------------------
4            CITIZENSHIP OR PLACE OF ORGANIZATION
             U.S. Citizen
- ------------------------------------ -------- ------------------------------------------------------------------------
                                     5        SOLE VOTING POWER
                NUMBER OF                     0 shares.
                 SHARES              -------- ------------------------------------------------------------------------
              BENEFICIALLY           6        SHARED VOTING POWER
             OWNED BY EACH                    0 shares.
               REPORTING             -------- ------------------------------------------------------------------------
                PERSON               7        SOLE DISPOSITIVE POWER
                 WITH                         0 shares.
                                     -------- ------------------------------------------------------------------------
                                     8        SHARED DISPOSITIVE POWER
                                              0 shares.
- ------------ ---------------------------------------------------------------------------------------------------------
9            AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH
             REPORTING PERSON                                                                       0
- ------------ ---------------------------------------------------------------------------------------------------------
10           CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9)
             EXCLUDES CERTAIN SHARES*                                                               [ ]
- ------------ ---------------------------------------------------------------------------------------------------------
11           PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9
                                                                                                    0%
- ------------ ---------------------------------------------------------------------------------------------------------
12           TYPE OF REPORTING PERSON*                                                              IN
- ------------ ---------------------------------------------------------------------------------------------------------
<FN>
                                        * SEE INSTRUCTIONS BEFORE FILLING OUT!
</FN>
</TABLE>

<PAGE>


<TABLE>
<CAPTION>
- ------------------------------------                                           --------------------------------------
CUSIP No. 81931940                                     13 G                              Page 10 of 14 Pages
- ------------------------------------                                           --------------------------------------

- ------------ ---------------------------------------------------------------------------------------------------------
<S>          <C>
1            NAME OF REPORTING
             SS OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON
                      Donald J. Lothrop ("Lothrop")
                      Tax ID Number:
- ------------ ---------------------------------------------------------------------------------------------------------
2            CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*
                                                                                    (a)  [ ]     (b)  [X]
- ------------ ---------------------------------------------------------------------------------------------------------
3            SEC USE ONLY
- ------------ ---------------------------------------------------------------------------------------------------------
4            CITIZENSHIP OR PLACE OF ORGANIZATION                                                 U.S. Citizen
- ------------------------------------ -------- ------------------------------------------------------------------------
                                     5        SOLE VOTING POWER
               NUMBER OF                      0 shares.
                SHARES               -------- ------------------------------------------------------------------------
             BENEFICIALLY            6        SHARED VOTING POWER
            OWNED BY EACH                     0 shares.
              REPORTING              -------- ------------------------------------------------------------------------
               PERSON                7        SOLE DISPOSITIVE POWER
                WITH                          0 shares.
                                     -------- ------------------------------------------------------------------------
                                     8        SHARED DISPOSITIVE POWER
                                              0 shares.
- ------------------------------------ -------- ------------------------------------------------------------------------
9            AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH
             REPORTING PERSON                                                                       0
- ------------ ---------------------------------------------------------------------------------------------------------
10           CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9)
             EXCLUDES CERTAIN SHARES*                                                               [ ]
- ------------ ---------------------------------------------------------------------------------------------------------
11           PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9                                        0%
- ------------ ---------------------------------------------------------------------------------------------------------
12           TYPE OF REPORTING PERSON*                                                              IN
- ------------ ---------------------------------------------------------------------------------------------------------
<FN>
                                        * SEE INSTRUCTIONS BEFORE FILLING OUT!
</FN>
</TABLE>


<PAGE>

                                                             Page 11 of 14 Pages


This  statement  amends and  restates  the  Statement  on 13(G)  filed by Delphi
Ventures I, L.P.,  Delphi  BioInvestments  I, L.P.,  Delphi  Ventures  II, L.P.,
Delphi  BioInvestments  II, L.P., Delphi Management  Partners I, L.P. ("DMP I"),
Delphi Management  Partners II, L.P. ("DMP II"), Jim Bochnowski  ("Bochnowski"),
David Douglass  ("Douglass")  and Donald J. Lothrop  ("Lothrop").  The foregoing
entities  and  individuals  are  collectively  referred  to  as  the  "Reporting
Persons".

ITEM 1(a).        NAME OF ISSUER:
                  ---------------

                  Shaman Pharmaceuticals, Inc.

ITEM 1(b).        ADDRESS OF ISSUER'S PRINCIPAL EXECUTIVE OFFICES:
                  ------------------------------------------------

                  213 East Grand Avenue
                  South San Francisco, California 94080

ITEM 2(a).        NAME OF PERSONS FILING:
                  -----------------------

                  This  Statement  is filed by Delphi  Ventures I, L.P.,  Delphi
                  BioInvestments  I, L.P.,  Delphi  Ventures  II,  L.P.,  Delphi
                  BioInvestments  II, L.P., Delphi  Management  Partners I, L.P.
                  ("DMP I"), Delphi Management Partners II, L.P. ("DMP II"), Jim
                  Bochnowski  ("Bochnowski"),  David Douglass  ("Douglass")  and
                  Donald J.  Lothrop  ("Lothrop").  The  foregoing  entities and
                  individuals  are  collectively  referred to as the  "Reporting
                  Persons."

                  DMP I is the  general  partner  of DV I and DBI I,  and may be
                  deemed  to have  shared  power  to vote  and  shared  power to
                  dispose of shares of the issuer directly owned by DV I and DBI
                  I. DMP II is the general  partner of DV II and DBI II, and may
                  be deemed to have  shared  power to vote and  shared  power to
                  dispose  of shares of the issuer  directly  owned by DV II and
                  DBI II.  Bochnowski,  Douglass  and  Lothrop  are the  general
                  partners of DMP I and DMP II, and may be deemed to have shared
                  power to vote and  shared  power to  dispose  of the shares of
                  issuer directly owned by DV I, DBI I, DV II, and DBI II.

ITEM 2(b).        ADDRESS OF PRINCIPAL BUSINESS OFFICE, OR, IF NONE, RESIDENCE:
                  -------------------------------------------------------------

                  The address for each of the Reporting Persons is:

                  Delphi Ventures
                  3000 Sand Hill Rd.,
                  Building I, Suite 135
                  Menlo Park, CA  94025

ITEM 2(c)         CITIZENSHIP:
                  ------------

                  DV I,  DBI I,  DV II,  DBI II,  DMP I and DMP II are  Delaware
                  limited partnerships, and Bochnowski, Douglass and Lothrop are
                  United States citizens.

<PAGE>

                                                             Page 12 of 14 Pages

ITEM 2(d).        TITLE OF CLASS OF SECURITIES:
                  -----------------------------

                  Common Stock

ITEM 2(e).        CUSIP NUMBER:
                  -------------

                  CUSIP #  81931940

ITEM 3.           Not Applicable



<TABLE>
ITEM 4.           OWNERSHIP:
                  ----------

<CAPTION>
                  The following information with respect to the ownership of the
                  Common  Stock  of  the  issuer  by  the  persons  filing  this
                  Statement is provided as of December 31, 1999:

<S>                        <C>
                           (a)      Amount beneficially owned:
                                    -------------------------

                                    See Row 9 of cover  page for each  Reporting
                                    Person.

                           (b)      Percent of Class:
                                    ----------------

                                    See Row 11 of cover page for each  Reporting
                                    Person.

                           (c)      Number of shares as to which such person has:
                                    --------------------------------------------

                                                     (i)      Sole power to vote or to direct the vote:
                                                              ----------------------------------------

                                                              See Row 5 of cover
                                                              page for each Reporting Person.

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

                                                              See Row 6 of cover
                                                              page for each Reporting Person.

                                                     (iii)    Sole power to dispose or to direct the disposition of:
                                                              ------------------------------------------------------

                                                              See Row 7 of cover
                                                              page for each Reporting Person.

                                                     (iv)     Shared power to dispose or to direct the
                                                              ----------------------------------------
                                                              disposition of:
                                                              --------------

                                                              See Row 8 of cover
                                                              page for each Reporting Person.
</TABLE>


<PAGE>


                                                             Page 13 of 14 Pages


<TABLE>
<CAPTION>
<S>               <C>
ITEM 5.           OWNERSHIP OF FIVE PERCENT OR LESS OF A CLASS:
                  ---------------------------------------------

                  If this statement is being filed to report the fact that as of the date hereof the reporting
                  person has ceased to be the beneficial owner of more than five percent of the class of
                  securities, check the following:  [X]  Yes

ITEM 6.           OWNERSHIP OF MORE THAN FIVE PERCENT ON BEHALF OF ANOTHER PERSON:
                  ---------------------------------------------------------------

                  Not applicable.


ITEM 7.           IDENTIFICATION AND CLASSIFICATION OF THE SUBSIDIARY WHICH ACQUIRED THE SECURITY BEING REPORTED
                  ----------------------------------------------------------------------------------------------
                  ON BY THE PARENT HOLDING COMPANY:
                  ---------------------------------

                  Not applicable.

ITEM 8.           IDENTIFICATION AND CLASSIFICATION OF MEMBERS OF THE GROUP:
                  ---------------------------------------------------------

                  Not applicable

ITEM 9.           NOTICE OF DISSOLUTION OF GROUP:
                  ------------------------------

                  Not applicable

ITEM 10.          CERTIFICATION:
                  -------------

                  Not applicable

</TABLE>






<PAGE>

                                                             Page 14 of 14 Pages


                                   SIGNATURES

                  After  reasonable  inquiry and to the best of my knowledge and
belief,  I certify  that the  information  set forth in this  statement is true,
complete and correct.

Dated:  February 10, 2000



                                     /s/ James R. Bochnowski
                                     -------------------------------------------
                                     James R. Bochnowski,  individually,  and on
                                     behalf  of  DV  I,  in  his  capacity  as a
                                     general  partner  of  DMP  I,  the  general
                                     partner of DV I, on behalf of DBI I, in his
                                     capacity as a general partner of DMP I, the
                                     general  partner of DBI I, on behalf of DMP
                                     I in  his  capacity  as a  general  partner
                                     thereof,   on  behalf  of  DV  II,  in  his
                                     capacity  as a general  partner  of DMP II,
                                     the general  partner of DV II, on behalf of
                                     DBI  II,  in  his  capacity  as  a  general
                                     partner of DMP II, the  general  partner of
                                     DBI  II,  and  on  behalf  of DMP II in his
                                     capacity as a general partner thereof.



                                     /s/ David Douglass
                                         ---------------------------------------
                                         David Douglass



                                     /s/ Donald J. Lothrop
                                     -------------------------------------------
                                         Donald J. Lothrop




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