CONNETICS CORP
SC 13D/A, 1998-11-25
PHARMACEUTICAL PREPARATIONS
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                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549


                                  SCHEDULE 13D
                                 Amendment No. 2

                    Under the Securities Exchange Act of 1934

                              Connetics Corporation
           -----------------------------------------------------------
                                (Name of Issuer)

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

                                   0002078541
           -----------------------------------------------------------
                                 (CUSIP Number)

                                 Eileen McCarthy
                       One Post Office Square, Suite 3800
                                Boston, MA 02109
                                 (617) 482-8020
           -----------------------------------------------------------
           (Name, Address and Telephone Number of Person Authorized to
                       Receive Notices and Communications)

                                November 23, 1998
           -----------------------------------------------------------
             (Date of Event which Requires Filing of this Statement)


         If the filing person has  previously  filed a statement on Schedule 13G
to report the  acquisition  which is the subject of this  Schedule  13D,  and is
filing this schedule because of Rule 13d-1(b)(3) or (4), check the following box
[ ].

         Check the following box if a fee is being paid with this statement [ ].
(A fee  is not  required  only  if the  reporting  person:  (1)  has a  previous
statement on file  reporting  beneficial  ownership of more than five percent of
the class of  securities  described  in Item 1; and (2) has  filed no  amendment
subsequent  thereto  reporting  beneficial  ownership of five percent or less of
such class. (See Rule 13d-7).

         Note: Six copies of this statement,  including all exhibits,  should be
filed with the  Commission.  See Rule  13d-1(a) for other parties to whom copies
are to be sent.

         * 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 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,  as  amended  (the  "Exchange  Act") or  otherwise  subject  to the
liabilities  of that  section  of the  Exchange  Act but shall be subject to all
other provisions of the Exchange Act.

                        (Continued on following page(s))

                               Page 1 of 29 Pages


<PAGE>


<TABLE>
<CAPTION>
<S>                                                              <C>                          <C>
CUSIP No. 0002078541                                             13D                          Page 2 of 18 Pages


- -------------------------------------------------------------------------------------------------------------------
  (1) Names of Reporting Persons.  SS or I.R.S. Identification Nos. of Above Persons

       Alta Partners                                                                                               
- -------------------------------------------------------------------------------------------------------------------
  (2) Check The Appropriate Box If A Member Of A Group                                  (a) [ ]
                                                                                        (b) [X]
- -------------------------------------------------------------------------------------------------------------------
  (3)    SEC Use Only

- -------------------------------------------------------------------------------------------------------------------
  (4)    Source Of Funds*

       WC                                                                                                          
- -------------------------------------------------------------------------------------------------------------------
  (5)    Check Box If Disclosure Of Legal Proceedings Is Required Pursuant To Items 2(d) Or 2(e) [ ]

- -------------------------------------------------------------------------------------------------------------------
  (6)    Citizenship Or Place Of Organization

               California                                                                                                  
- -------------------------------------------------------------------------------------------------------------------
Number Of Shares                                              (7)      Sole Voting Power        2,537,163
Beneficially Owned
By Each Reporting
Person With                                                   (8)      Shared Voting Power      -0-


                                                              (9)     Sole Dispositive Power    2,537,163


                                                              (10)    Shared Dispositive Power  -0-

  (11)   Aggregate Amount Beneficially Owned By Each Reporting Person

                  2,537,163                                                                                        
- -------------------------------------------------------------------------------------------------------------------
  (12)   Check If The Aggregate Amount In Row (11) Excludes Certain Shares*

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

  (13)   Percent Of Class Represented By Amount In Row (11)

                  12.40%                                                                                           
- -------------------------------------------------------------------------------------------------------------------
  (14)   Type Of Reporting Person

                  IA                                                                                               
- -------------------------------------------------------------------------------------------------------------------
<FN>
                                        *SEE INSTRUCTION BEFORE FILLING OUT!
</FN>
</TABLE>

                                                Page 2 of 29 Pages

<PAGE>


<TABLE>
<CAPTION>
<S>                                                              <C>                          <C>
CUSIP No. 0002078541                                             13D                          Page 3 of 18 Pages


- -------------------------------------------------------------------------------------------------------------------
  (1) Names of Reporting Persons.  SS or I.R.S. Identification Nos. of Above Persons

       Alta BioPharma Partners, L.P.                                                                               
- -------------------------------------------------------------------------------------------------------------------
  (2) Check The Appropriate Box If A Member Of A Group                                  (a) [ ]
                                                                                        (b) [X]
- -------------------------------------------------------------------------------------------------------------------
  (3)    SEC Use Only

- -------------------------------------------------------------------------------------------------------------------
  (4)    Source Of Funds*

       WC                                                                                                          
- -------------------------------------------------------------------------------------------------------------------
  (5)    Check Box If Disclosure Of Legal Proceedings Is Required Pursuant To Items 2(d) Or 2(e) [ ]

- -------------------------------------------------------------------------------------------------------------------
  (6)    Citizenship Or Place Of Organization

       Delaware                                                                                                    
- -------------------------------------------------------------------------------------------------------------------
Number Of Shares                                              (7)      Sole Voting Power        1,577,065
Beneficially Owned
By Each Reporting
Person With                                                   (8)      Shared Voting Power      -0-


                                                              (9)     Sole Dispositive Power    1,577,065


                                                              (10)    Shared Dispositive Power  -0-


  (11)   Aggregate Amount Beneficially Owned By Each Reporting Person

                  1,577,065                                                                                        
- -------------------------------------------------------------------------------------------------------------------
  (12)   Check If The Aggregate Amount In Row (11) Excludes Certain Shares*

- -------------------------------------------------------------------------------------------------------------------
  (13)   Percent Of Class Represented By Amount In Row (11)

                  7.71%                                                                                            
- -------------------------------------------------------------------------------------------------------------------
  (14)   Type Of Reporting Person

                  PN                                                                                               
- -------------------------------------------------------------------------------------------------------------------
<FN>
                                        *SEE INSTRUCTION BEFORE FILLING OUT!
</FN>
</TABLE>

                                                 Page 3 of 29 Pages


<PAGE>


<TABLE>
<CAPTION>
<S>                                                              <C>                          <C>
CUSIP No. 0002078541                                             13D                          Page 4 of 18 Pages


- -------------------------------------------------------------------------------------------------------------------
  (1) Names of Reporting Persons.  SS or I.R.S. Identification Nos. of Above Persons

       Alta Embarcadero BioPharma, LLC                                                                             
- -------------------------------------------------------------------------------------------------------------------
  (2) Check The Appropriate Box If A Member Of A Group                                  (a) [ ]
                                                                                        (b) [X]
- -------------------------------------------------------------------------------------------------------------------
  (3)    SEC Use Only

- -------------------------------------------------------------------------------------------------------------------
  (4)    Source Of Funds*

        WC                                                                                                         
- -------------------------------------------------------------------------------------------------------------------
  (5)    Check Box If Disclosure Of Legal Proceedings Is Required Pursuant To Items 2(d) Or 2(e) [ ]

- -------------------------------------------------------------------------------------------------------------------
  (6)    Citizenship Or Place Of Organization

    Delaware                                                                                                       
- -------------------------------------------------------------------------------------------------------------------
Number Of Shares                                              (7)      Sole Voting Power        59,443
Beneficially Owned
By Each Reporting
Person With                                                   (8)      Shared Voting Power      -0-


                                                              (9)      Sole Dispositive Power   59,443


                                                              (10)     Shared Dispositive Power -0-


  (11)   Aggregate Amount Beneficially Owned By Each Reporting Person

                  59,443                                                                                           
- -------------------------------------------------------------------------------------------------------------------
  (12)   Check If The Aggregate Amount In Row (11) Excludes Certain Shares*

- -------------------------------------------------------------------------------------------------------------------
  (13)   Percent Of Class Represented By Amount In Row (11)

                  .29%                                                                                             
- -------------------------------------------------------------------------------------------------------------------
  (14)   Type Of Reporting Person

                  CO                                                                                               
- -------------------------------------------------------------------------------------------------------------------
<FN>
                                        *SEE INSTRUCTION BEFORE FILLING OUT!
</FN>
</TABLE>

                                                 Page 4 of 29 Pages

<PAGE>


<TABLE>
<CAPTION>
<S>                                                              <C>                          <C>
CUSIP No. 0002078541                                             13D                          Page 5 of 18 Pages


  (1) Names of Reporting Persons.  SS or I.R.S. Identification Nos. of Above Persons

       Connetics Partners (Alta Bio), LLC                                                                          
- -------------------------------------------------------------------------------------------------------------------
  (2) Check The Appropriate Box If A Member Of A Group                                  (a) [ ]
                                                                                        (b) [X]

- -------------------------------------------------------------------------------------------------------------------
  (3)    SEC Use Only

- -------------------------------------------------------------------------------------------------------------------
  (4)    Source Of Funds*

          WC                                                                                                       
- -------------------------------------------------------------------------------------------------------------------
  (5)    Check Box If Disclosure Of Legal Proceedings Is Required Pursuant To Items 2(d) Or 2(e) [ ]

- -------------------------------------------------------------------------------------------------------------------
  (6)    Citizenship Or Place Of Organization

          Delaware                                                                                                         
- ---------------------------------------------------------------------------------------------------------------------------
Number Of Shares                                              (7)      Sole Voting Power        900,655
Beneficially Owned
By Each Reporting
Person With                                                   (8)      Shared Voting Power      -0-

                                                              (9)      Sole Dispositive Power   900,655

                                                              (10)     Shared Dispositive Power -0-

(11)     Aggregate Amount Beneficially Owned By Each Reporting Person

                  900,655                                                                                          
- -------------------------------------------------------------------------------------------------------------------
  (12)   Check If The Aggregate Amount In Row (11) Excludes Certain Shares*

- -------------------------------------------------------------------------------------------------------------------
  (13)   Percent Of Class Represented By Amount In Row (11)

                  4.40%                                                                                            
- -------------------------------------------------------------------------------------------------------------------
  (14)   Type Of Reporting Person

                  CO                                                                                               
- -------------------------------------------------------------------------------------------------------------------
<FN>
                                        *SEE INSTRUCTION BEFORE FILLING OUT!
</FN>
</TABLE>

                                                 Page 5 of 29 Pages

<PAGE>


<TABLE>
<CAPTION>
<S>                                                              <C>                              <C>
CUSIP No. 0002078541                                             13D                              Page 6 of 18 Pages


  (1) Names of Reporting Persons.  SS or I.R.S. Identification Nos. of Above Persons

       Alta BioPharma Management, LLC                                                                              
- -------------------------------------------------------------------------------------------------------------------
  (2) Check The Appropriate Box If A Member Of A Group                                  (a) [ ]
                                                                                        (b) [X]

- -------------------------------------------------------------------------------------------------------------------
  (3)    SEC Use Only

- -------------------------------------------------------------------------------------------------------------------
  (4)    Source Of Funds*

       WC                                                                                                          
- -------------------------------------------------------------------------------------------------------------------
  (5)    Check Box If Disclosure Of Legal Proceedings Is Required Pursuant To Items 2(d) Or 2(e) [ ]

- -------------------------------------------------------------------------------------------------------------------
  (6)    Citizenship Or Place Of Organization

       Delaware                                                                                                    
- -------------------------------------------------------------------------------------------------------------------
Number Of Shares                                              (7)      Sole Voting Power        1,577,065
Beneficially Owned
By Each Reporting
Person With                                                   (8)      Shared Voting Power      960,098

                                                              (9)      Sole Dispositive Power   1,577,065

                                                              (10)     Shared Dispositive Power 960,098

(11)     Aggregate Amount Beneficially Owned By Each Reporting Person

                  2,537,163                                                                                        
- -------------------------------------------------------------------------------------------------------------------
  (12)   Check If The Aggregate Amount In Row (11) Excludes Certain Shares*

- -------------------------------------------------------------------------------------------------------------------
  (13)   Percent Of Class Represented By Amount In Row (11)

                  12.40%                                                                                           
- -------------------------------------------------------------------------------------------------------------------
  (14)   Type Of Reporting Person

                  CO                                                                                               
- -------------------------------------------------------------------------------------------------------------------
<FN>
                                        *SEE INSTRUCTION BEFORE FILLING OUT!
</FN>
</TABLE>

                                                 Page 6 of 29 Pages

<PAGE>


<TABLE>
<CAPTION>
<S>                                                              <C>                          <C>
CUSIP No. 0002078541                                             13D                          Page 7 of 18 Pages


  (1) Names of Reporting Persons.  SS or I.R.S. Identification Nos. of Above Persons

       Alta/Chase BioPharma Management, LLC                                                               
- ----------------------------------------------------------------------------------------------------------
  (2) Check The Appropriate Box If A Member Of A Group                                  (a) [ ]
                                                                                        (b) [X]
- -------------------------------------------------------------------------------------------------------------------
  (3)    SEC Use Only

- -------------------------------------------------------------------------------------------------------------------
  (4)    Source Of Funds*

       WC                                                                                                          
- -------------------------------------------------------------------------------------------------------------------
  (5)    Check Box If Disclosure Of Legal Proceedings Is Required Pursuant To Items 2(d) Or 2(e) [ ]

- -------------------------------------------------------------------------------------------------------------------
  (6)    Citizenship Or Place Of Organization

       Delaware                                                                                                    
- -------------------------------------------------------------------------------------------------------------------
Number Of Shares                                              (7)      Sole Voting Power        900,655
Beneficially Owned
By Each Reporting
Person With                                                   (8)      Shared Voting Power      1,636,508

                                                              (9)      Sole Dispositive Power   900,655

                                                              (10)     Shared Dispositive Power 1,636,508

  (11)   Aggregate Amount Beneficially Owned By Each Reporting Person

                  2,537,163                                                                                        
- -------------------------------------------------------------------------------------------------------------------
  (12)   Check If The Aggregate Amount In Row (11) Excludes Certain Shares*

- -------------------------------------------------------------------------------------------------------------------
  (13)   Percent Of Class Represented By Amount In Row (11)

                  12.40%                                                                                           
- -------------------------------------------------------------------------------------------------------------------
  (14)   Type Of Reporting Person

                  CO                                                                                               
- -------------------------------------------------------------------------------------------------------------------
<FN>
                                        *SEE INSTRUCTION BEFORE FILLING OUT!
</FN>
</TABLE>

                                                 Page 7 of 29 Pages

<PAGE>


<TABLE>
<CAPTION>
<S>                                                              <C>                          <C>
CUSIP No. 0002078541                                             13D                          Page 8 of 18 Pages


  (1) Names of Reporting Persons.  SS or I.R.S. Identification Nos. of Above Persons

       Jean Deleage                                                                                                
- -------------------------------------------------------------------------------------------------------------------
  (2) Check The Appropriate Box If A Member Of A Group                                  (a) [ ]
                                                                                        (b) [X]
- -------------------------------------------------------------------------------------------------------------------
  (3)    SEC Use Only

- -------------------------------------------------------------------------------------------------------------------
  (4)    Source Of Funds*

       AF                                                                                                                  
- -------------------------------------------------------------------------------------------------------------------
  (5)    Check Box If Disclosure Of Legal Proceedings Is Required Pursuant To Items 2(d) Or 2(e) [ ]

- -------------------------------------------------------------------------------------------------------------------
  (6)    Citizenship Or Place Of Organization

       U.S.A.                                                                                                      
- -------------------------------------------------------------------------------------------------------------------
Number Of Shares                                              (7)      Sole Voting Power        -0-
Beneficially Owned
By Each Reporting
Person With                                                   (8)      Shared Voting Power      2,537,163

                                                              (9)      Sole Dispositive Power    -0-

                                                              (10)     Shared Dispositive Power  2,537,163

(11)     Aggregate Amount Beneficially Owned By Each Reporting Person

                  2,537,163                                                                                                
- ---------------------------------------------------------------------------------------------------------------------------
  (12)   Check If The Aggregate Amount In Row (11) Excludes Certain Shares*

- -------------------------------------------------------------------------------------------------------------------
  (13)   Percent Of Class Represented By Amount In Row (11)

                  12.40%                                                                                          
- -------------------------------------------------------------------------------------------------------------------
  (14)   Type Of Reporting Person

                  IN                                                                                               
- -------------------------------------------------------------------------------------------------------------------
<FN>
                                        *SEE INSTRUCTION BEFORE FILLING OUT!
</FN>
</TABLE>

                                                 Page 8 of 29 Pages

<PAGE>


<TABLE>
<CAPTION>
<S>                                                              <C>                          <C>
CUSIP No. 0002078541                                             13D                          Page 9 of 18 Pages


  (1) Names of Reporting Persons.  SS or I.R.S. Identification Nos. of Above Persons

       Garrett Gruener                                                                                             
- -------------------------------------------------------------------------------------------------------------------
  (2) Check The Appropriate Box If A Member Of A Group                                  (a) [ ]
                                                                                        (b) [X]
- -------------------------------------------------------------------------------------------------------------------
  (3)    SEC Use Only

- -------------------------------------------------------------------------------------------------------------------
  (4)    Source Of Funds*

          AF                                                                                                       
- -------------------------------------------------------------------------------------------------------------------
  (5)    Check Box If Disclosure Of Legal Proceedings Is Required Pursuant To Items 2(d) Or 2(e) [ ]

- -------------------------------------------------------------------------------------------------------------------
  (6)    Citizenship Or Place Of Organization

          U.S.A.                                                                                                   
- -------------------------------------------------------------------------------------------------------------------
Number Of Shares                                              (7)      Sole Voting Power        -0-
Beneficially Owned
By Each Reporting
Person With                                                   (8)      Shared Voting Power      2,537,163

                                                              (9)      Sole Dispositive Power   -0-

                                                              (10)     Shared Dispositive Power 2,537,163

(11)     Aggregate Amount Beneficially Owned By Each Reporting Person

                  2,537,163                                                                                        
- -------------------------------------------------------------------------------------------------------------------
  (12)   Check If The Aggregate Amount In Row (11) Excludes Certain Shares*

- -------------------------------------------------------------------------------------------------------------------
  (13)   Percent Of Class Represented By Amount In Row (11)

                  12.40%                                                                                           
- -------------------------------------------------------------------------------------------------------------------
  (14)   Type Of Reporting Person

                  IN                                                                                               
- -------------------------------------------------------------------------------------------------------------------
<FN>
                                        *SEE INSTRUCTION BEFORE FILLING OUT!
</FN>
</TABLE>

                                                 Page 9 of 29 Pages

<PAGE>


<TABLE>
<CAPTION>
<S>                                                              <C>                          <C>
CUSIP No. 0002078541                                             13D                          Page 10 of 18 Pages


  (1) Names of Reporting Persons.  SS or I.R.S. Identification Nos. of Above Persons

      Daniel Janney                                                                                                
- -------------------------------------------------------------------------------------------------------------------
  (2) Check The Appropriate Box If A Member Of A Group                                  (a) [ ]
                                                                                        (b) [X]
- -------------------------------------------------------------------------------------------------------------------
  (3)    SEC Use Only

- -------------------------------------------------------------------------------------------------------------------
  (4)    Source Of Funds*

       AF                                                                                                                  
- -------------------------------------------------------------------------------------------------------------------
  (5)    Check Box If Disclosure Of Legal Proceedings Is Required Pursuant To Items 2(d) Or 2(e) [ ]

- -------------------------------------------------------------------------------------------------------------------
  (6)    Citizenship Or Place Of Organization

       U.S.A.                                                                                                      
- -------------------------------------------------------------------------------------------------------------------
Number Of Shares                                              (7)      Sole Voting Power        -0-
Beneficially Owned
By Each Reporting
Person With                                                   (8)      Shared Voting Power      2,537,163

                                                              (9)      Sole Dispositive Power   -0-

                                                              (10)     Shared Dispositive Power 2,537,163

(11)     Aggregate Amount Beneficially Owned By Each Reporting Person

                  2,537,163                                                                                        
- -------------------------------------------------------------------------------------------------------------------
  (12)   Check If The Aggregate Amount In Row (11) Excludes Certain Shares*

- -------------------------------------------------------------------------------------------------------------------
  (13)   Percent Of Class Represented By Amount In Row (11)

                  12.40%                                                                                           
- -------------------------------------------------------------------------------------------------------------------
  (14)   Type Of Reporting Person

                  IN                                                                                               
- -------------------------------------------------------------------------------------------------------------------
<FN>
                                        *SEE INSTRUCTION BEFORE FILLING OUT!
</FN>
</TABLE>

                                                Page 10 of 29 Pages

<PAGE>


<TABLE>
<CAPTION>
<S>                                                              <C>                          <C>
CUSIP No. 0002078541                                             13D                          Page 11 of 18 Pages


  (1) Names of Reporting Persons.  SS or I.R.S. Identification Nos. of Above Persons

       Alix Marduel                                                                                                
- -------------------------------------------------------------------------------------------------------------------
  (2) Check The Appropriate Box If A Member Of A Group                                  (a) [ ]
                                                                                        (b) [X]
- -------------------------------------------------------------------------------------------------------------------
  (3)    SEC Use Only

- -------------------------------------------------------------------------------------------------------------------
  (4)    Source Of Funds*

       PF, AF                                                                                                      
- -------------------------------------------------------------------------------------------------------------------
  (5)    Check Box If Disclosure Of Legal Proceedings Is Required Pursuant To Items 2(d) Or 2(e) [ ]

- -------------------------------------------------------------------------------------------------------------------
  (6)    Citizenship Or Place Of Organization

       U.S.A.                                                                                                      
- -------------------------------------------------------------------------------------------------------------------
Number Of Shares                                              (7)      Sole Voting Power        -0-
Beneficially Owned
By Each Reporting
Person With                                                   (8)      Shared Voting Power      2,537,163

                                                              (9)      Sole Dispositive Power   -0-

                                                              (10)     Shared Dispositive Power 2,537,163

(11)     Aggregate Amount Beneficially Owned By Each Reporting Person

                  2,537,163                                                                                        
- -------------------------------------------------------------------------------------------------------------------
  (12)   Check If The Aggregate Amount In Row (11) Excludes Certain Shares*

- -------------------------------------------------------------------------------------------------------------------
  (13)   Percent Of Class Represented By Amount In Row (11)

                  12.40%                                                                                          
- -------------------------------------------------------------------------------------------------------------------
  (14)   Type Of Reporting Person

                  IN                                                                                               
- -------------------------------------------------------------------------------------------------------------------
<FN>
                                        *SEE INSTRUCTION BEFORE FILLING OUT!
</FN>
</TABLE>

                                                Page 11 of 29 Pages

<PAGE>


<TABLE>
<CAPTION>
<S>                                                              <C>                          <C>
CUSIP No. 0002078541                                             13D                          Page 12 of 18 Pages


  (1) Names of Reporting Persons.  SS or I.R.S. Identification Nos. of Above Persons

       Guy Nohra                                                                                                   
- -------------------------------------------------------------------------------------------------------------------
  (2) Check The Appropriate Box If A Member Of A Group                                  (a) [ ]
                                                                                        (b) [X]
- -------------------------------------------------------------------------------------------------------------------
  (3)    SEC Use Only

- -------------------------------------------------------------------------------------------------------------------
  (4)    Source Of Funds*

          AF                                                                                                       
- -------------------------------------------------------------------------------------------------------------------
  (5)    Check Box If Disclosure Of Legal Proceedings Is Required Pursuant To Items 2(d) Or 2(e)  [ ]

- -------------------------------------------------------------------------------------------------------------------
  (6)    Citizenship Or Place Of Organization

          U.S.A.                                                                                                   
- -------------------------------------------------------------------------------------------------------------------
Number Of Shares                                              (7)      Sole Voting Power        -0-
Beneficially Owned
By Each Reporting
Person With                                                   (8)      Shared Voting Power      2,537,163

                                                              (9)      Sole Dispositive Power   -0-

                                                              (10)     Shared Dispositive Power 2,537,163

(11)     Aggregate Amount Beneficially Owned By Each Reporting Person

                  2,537,163                                                                                        
- -------------------------------------------------------------------------------------------------------------------
  (12)   Check If The Aggregate Amount In Row (11) Excludes Certain Shares*

- -------------------------------------------------------------------------------------------------------------------
  (13)   Percent Of Class Represented By Amount In Row (11)

                  12.40%                                                                                           
- -------------------------------------------------------------------------------------------------------------------
  (14)   Type Of Reporting Person

                  IN                                                                                               
- -------------------------------------------------------------------------------------------------------------------
<FN>
                                        *SEE INSTRUCTION BEFORE FILLING OUT!
</FN>
</TABLE>

                                                Page 12 of 29 Pages

<PAGE>


<TABLE>
<CAPTION>
<S>                                                              <C>                          <C>
CUSIP No. 0002078541                                             13D                          Page 13 of 18 Pages


  (1) Names of Reporting Persons.  SS or I.R.S. Identification Nos. of Above Persons

       Marino Polestra                                                                                             
- -------------------------------------------------------------------------------------------------------------------
  (2) Check The Appropriate Box If A Member Of A Group                                  (a) [ ]
                                                                                        (b) [X]
- -------------------------------------------------------------------------------------------------------------------
  (3)    SEC Use Only

- -------------------------------------------------------------------------------------------------------------------
  (4)    Source Of Funds*

       AF                                                                                                                  
- -------------------------------------------------------------------------------------------------------------------
  (5)    Check Box If Disclosure Of Legal Proceedings Is Required Pursuant To Items 2(d) Or 2(e) [ ]

- -------------------------------------------------------------------------------------------------------------------
  (6)    Citizenship Or Place Of Organization

       U.S.A.                                                                                                      
- -------------------------------------------------------------------------------------------------------------------
Number Of Shares                                              (7)      Sole Voting Power        -0-
Beneficially Owned
By Each Reporting
Person With                                                   (8)      Shared Voting Power      2,537,163

                                                              (9)      Sole Dispositive Power   -0-

                                                              (10)     Shared Dispositive Power 2,537,163

(11)     Aggregate Amount Beneficially Owned By Each Reporting Person

                  2,537,163                                                                                        
- -------------------------------------------------------------------------------------------------------------------
  (12)   Check If The Aggregate Amount In Row (11) Excludes Certain Shares*

- -------------------------------------------------------------------------------------------------------------------
  (13)   Percent Of Class Represented By Amount In Row (11)

                  12.40%                                                                                           
- -------------------------------------------------------------------------------------------------------------------
  (14)   Type Of Reporting Person

                  IN                                                                                               
- -------------------------------------------------------------------------------------------------------------------
<FN>
                                        *SEE INSTRUCTION BEFORE FILLING OUT!
</FN>
</TABLE>

                                            Page 13 of 29 Pages

<PAGE>


Item 1. Security and Issuer.

         This  Statement on Schedule D relates to the Common  Stock,  $0.001 par
value per share (the "Shares"), of Connetics Corporation, a Delaware corporation
(the "Company").  The principal  executive offices of the Company are located at
3400 West Bayshore Road, Palo Alto, California 94303.


Item 2. Identity and Background.

         (a) This  Statement  is  filed  by Alta  BioPharma  Partners,  L.P.,  a
Delaware limited partnership ("Alta BioPharma"), and Alta Embarcadero BioPharma,
LLC, a Delaware limited  liability  company  ("Embarcadero  LLC"), and Connetics
Partners  (Alta Bio),  LLC, a Delaware LLC  ("Connetics  Alta Bio") by virtue of
their  direct  beneficial  ownership  of Shares,  by Alta  BioPharma  Management
Partners,  LLC, a Delaware limited  liability  company ("Alta  Management"),  by
virtue  of being the sole  general  partner  of Alta  BioPharma,  by  Alta/Chase
BioPharma  Management  LLC, a Delaware  limited  liability  company  (Alta/Chase
Management) by virtue of being the sole managing director of Connetics  Partners
(Alta  Bio),  LLC  and  by  Alta  Partners,  a  California   corporation  ("Alta
Partners"),  by  virtue  of  being  the  management  advisory  company  of these
entities. Alta BioPharma,  Embarcadero LLC, Connetics Alta Bio, Alta Management,
Alta/Chase  Management  and Alta  Partners are  collectively  referred to as the
"Reporting  Persons." Jean Deleage,  Garrett Gruener,  Dan Janney, Alix Marduel,
Guy Nohra and Marino  Polestra (the  "Partners")  are the managing  directors of
Alta Management,  Alta/Chase Management and officers of Alta Partners. By virtue
of the relationships described above and their roles with Alta Partners, each of
the Partners may be deemed to control Alta Partners, Alta/Chase Management, Alta
Management,  and,  therefore,  may be  deemed  to  possess  indirect  beneficial
ownership  of the Shares held by each  entity.  However,  none of the  Partners,
acting alone, has voting or investment power with respect to the Shares directly
beneficially  held by the  entities  and,  as a result,  the  Partners  disclaim
beneficial  ownership of the Shares directly  beneficially owned by each entity,
except to the extent of their pecuniary interest in each entity. Embarcadero LLC
is a side  company  that makes all  investments  pro rata to the capital of Alta
BioPharma  with all  allocations  made to its members based on paid-in  capital.
Certain of the Partners are members of  Embarcadero  LLC and certain  members of
Embarcadero LLC are affiliates of Alta Partners.

         (b) The principal executive offices of Alta BioPharma, Embarcadero LLC,
Connetics Alta Bio, Alta  Management,  Alta/Chase  Management and Alta Partners,
and the business address of each Partner, are located at One Embarcadero Center,
Suite 4050, San Francisco, California 94111.

         (c) Alta  Partners  provides  investment  advisory  services to venture
capital  firms.  Alta  BioPharma,  Connetics  Alta  Bio  and  Embarcadero  LLC's
principal business is acting as venture capital investment vehicles.  Alta/Chase
Management  and Alta  Management's  principal  business  is acting  as  managing
director of Connetics  Alta Bio and Alta  BioPharma,  respectively.  Each of the
Partners' principal business is acting as a managing director of Alta Management
and Alta/Chase Management and as an officer of Alta Partners.

         (d) None of the Reporting Persons or, to the knowledge of the Reporting
Persons, any of the Partners, has been convicted in a criminal proceeding in the
past five years (excluding traffic violations or similar misdemeanors).

         (e) During the past five years,  none of the  Reporting  Persons or, to
the knowledge of the Reporting Persons, and none of the Partners, was a party to
a  civil  proceeding  of  a  judicial  or   administrative   body  of  competent
jurisdiction  as a result of which such  person was or is subject to a judgment,
decree  or final  order  enjoining  future  violations  of,  or  prohibiting  or
mandating activities subject to, federal or state securities laws of finding any
violation with respect to such laws.

                               Page 14 of 29 Pages

<PAGE>


         (f) Alta  Partners is a  California  corporation.  Alta  BioPharma is a
Delaware limited  partnership.  Embarcadero LLC is a Delaware limited  liability
corporation. Connetics Alta Bio is a Delaware liability company. Alta Management
and Alta/Chase Management are Delaware limited liability companies.  Each of the
Partners is a citizen of the United States.


Item 3. Source and Amount of Funds or Other Consideration.

         The total  amount of funds  required by Alta  BioPharma  to acquire the
1,577,065  shares of Common Stock reported in Item 5(a) was  $7,196,802.50,  the
total amount of funds required by  Embarcadero  LLC to acquire the 59,443 shares
of Common Stock  reported in Item 5(a) was  $271,263.26  and the total amount of
funds  required by  Connetics  Alta Bio to acquire the 900,655  shares of Common
Stock reported in Item 5(a) was $4,110,063.13.  Such funds were provided by each
entities' capital available for investment.


Item 4. Purpose of Transaction.

         Alta  BioPharma,  Embarcadero  LLC, and Connetics Alta Bio acquired the
Common Stock  reported in Item 5(c) for  investment  only.  Depending upon their
evaluation  of  the  Company's  investments  and  prospects,   and  upon  future
developments  (including,  but  not  limited  to,  market  for the  Shares,  the
effective yield on the Shares, availability of funds, alternative uses of funds,
and money, stock market and general economic conditions),  each of the Reporting
Persons may from time to time  purchase  the Common  Stock,  dispose of all or a
portion of the Common  Stock that it holds,  or cease  buying or selling  Common
Stock. Any such additional purchases or sales of the Common Stock may be in open
market or privately-negotiated transactions or otherwise.

         On April 10, 1998, Alta  BioPharma,  Embarcadero LLC and Connetics Alta
Bio entered into a Common Stock  Purchase  Agreement (the "Common Stock Purchase
Agreement") with the Company  pursuant to which Alta BioPharma,  Embarcadero LLC
and  Connetics   Alta  Bio  acquired,   for  an  aggregate   purchase  price  of
$10,000,003.88,  a total of 2,162,163  Shares of Common Stock. The entities also
entered into a Registration  Rights Agreement.  On May 18, 1998, Alta BioPharma,
Embarcadero LLC and Connetics Alta Bio acquired, for an aggregate purchase price
of $578,125,  a total of 125,000  Shares of Common Stock . On November 23, 1998,
Alta  BioPharma,  Embarcadero  LLC  and  Connetics  Alta  Bio  acquired,  for an
aggregate  purchase  price of  $1,000,000,  a total of 250,000  Shares of Common
Stock. The entities also entered into a Registration Rights Agreement.


Item 5. Interest in Securities of the Issuer.

         (a) Alta BioPharma is the direct  beneficial  owner of 1,577,065 shares
of Common Stock or approximately  7.71% of the shares deemed  outstanding by the
Company  (20,463,011) as of November 23, 1998.  Connetics Alta Bio is the direct
beneficial owner of 900,655 shares of Common Stock or approximately 4.40% of the
shares deemed  outstanding by the Company  (20,463,011) as of November 23, 1998.
Embarcadero LLC is the direct  beneficial owner of 59,443 shares of Common Stock
or  approximately   .29%  of  the  shares  deemed  outstanding  by  the  Company
(20,463,011) as of November 23, 1998.

         (b) Each entity has the power to direct the disposition of and vote the
stock held by it. By virtue of the relationships  previously reported under Item
2 of this Statement,  Alta Management,  Alta/Chase  Management and Alta Partners
may be deemed to have indirect beneficial  ownership of the shares owned by such
entities.

         (c)  On  April  10,  1998  Alta  BioPharma,  Connetics  Alta  Bio,  and
Embarcadero  LLC acquired the Shares  described in Item 3 of this Statement in a
privately negotiated transaction with the Company for aggregate consideration of
$6,325,668, $3,446,846 and $227,489.88, respectively.

                              Page 15 of 29 Pages

<PAGE>


         On May 18, 1998 Alta BioPharma, Connetics Alta Bio, and Embarcadero LLC
acquired an  additional  53,956,  66,645 and 4,399  Shares,  respectively,  in a
privately  negotiated  transaction with certain  shareholders of the Company for
aggregate   consideration   of   $249,546.50,    $308,233.12   and   $20,345.38,
respectively.

         On  November  23,  1998  Alta   BioPharma,   Connetics  Alta  Bio,  and
Embarcadero  LLC  acquired  an  additional  155,397,  88,746  and 5,857  Shares,
respectively, in a privately negotiated transaction with certain shareholders of
the Company for  aggregate  consideration  of  $621,588,  $354,984  and $23,428,
respectively.

         Except  as set forth  above,  neither  the  Reporting  Persons  nor the
Partners have effected any transaction in the Shares during the past 60 days.

         (d) Alta  BioPharma,  Connetics Alta Bio and  Embarcadero LLC each have
the right to receive  dividends  and proceeds from the sale of Common Stock held
by it. By virtue of the relationships reported in Item 2 of this Statement. Alta
Management,  Alta/Chase  Management  and Alta Partners may be deemed to have the
power to direct the receipt of dividends  and the proceeds  from the sale of the
Common Stock held by each entity.

         (e) Not Applicable


Item 6. Contracts, Arrangements, Understandings or Relationships with Respect to
        Securities of the Issuer.

         The Connetics  Corporation  Common Stock Purchase Agreement dated April
10, 1998 and The Connetics Corporation Registration Rights Agreement dated April
10, 1998 are hereby incorporated in their entirety by this reference.


Item 7. Material to be Filed as Exhibits.

                  Exhibit A:  Joint Filing Statement.

                  Exhibit  B:  Connetics   Corporation   Common  Stock  Purchase
                  Agreement  dated April 10, 1998, as previously  submitted with
                  the Schedule D filed April 20, 1998 and incorporated herein by
                  reference.

                  Exhibit C: Connetics Corporation Registration Rights Agreement
                  dated  April  10,  1998,  as  previously  submitted  with  the
                  Schedule D filed  April 20,  1998 and  incorporated  herein by
                  reference.

                  Exhibit  D:  Alta  BioPharma   Partners  Limited   Partnership
                  Management   Rights   Agreement   dated  April  10,  1998,  as
                  previously  submitted with the Schedule D filed April 20, 1998
                  and incorporated herein by reference.


                  Exhibit E: Form of Connetics  Corporation  Registration Rights
                  Agreement dated November 20, 1998.

                               Page 16 of 29 Pages

<PAGE>


Signature

         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.


Date:  November 23, 1998

Alta Partners                                 Alta BioPharma Partners, L.P.

By:      /s/ /Eileen McCarthy                 By: Alta BioPharma Management, LLC
    -----------------------------------           Its General Partner
    Eileen McCarthy, Vice President    


Alta BioPharma Management, LLC                By:      /s/ Eileen McCarthy
                                                  ------------------------------
                                                  Eileen McCarthy, Member

By:      /s/ Eileen McCarthy                  Connetics Partners (Alta Bio), LLC
    -----------------------------------
    Eileen McCarthy, Member
                                              By: Alta/Chase BioPharma
Alta/Chase BioPharma Management, LLC              Management, LLC
                                                  Its Managing Member

By:      /s/ Eileen McCarthy                  By:      /s/ Eileen McCarthy
    -----------------------------------           ------------------------------
    Eileen McCarthy, Member                       Eileen McCarthy, Member

Alta Embarcadero BioPharma, LLC


By:      /s/ Eileen McCarthy
    -----------------------------------
    Eileen McCarthy, Member


    /s/ Jean Deleage                               /s/ Guy Nohra
- ----------------------------------            ----------------------------------
Jean Deleage                                  Guy Nohra

    /s/ /Garrett Gruener                           /s/ Marino Polestra
- ----------------------------------            ----------------------------------
Garrett Gruener                               Marino Polestra

    /s/ Daniel Janney                              /s/ Alix Marduel
- ----------------------------------            ----------------------------------
Daniel Janney                                 Alix Marduel

                               Page 17 of 29 Pages

<PAGE>


                                    EXHIBIT A

                             Joint Filing Statement

         We, the  undersigned,  hereby  express our agreement  that the attached
Schedule 13D is filed on behalf of each of us.

Date:  November 23, 1998

Alta Partners                                 Alta BioPharma Partners, L.P.

By:      /s/ /Eileen McCarthy                 By: Alta BioPharma Management, LLC
    -----------------------------------           Its General Partner
    Eileen McCarthy, Vice President    


Alta BioPharma Management, LLC                By:      /s/ Eileen McCarthy
                                                  ------------------------------
                                                  Eileen McCarthy, Member

By:      /s/ Eileen McCarthy                  Connetics Partners (Alta Bio), LLC
    -----------------------------------
    Eileen McCarthy, Member
                                              By: Alta/Chase BioPharma
Alta/Chase BioPharma Management, LLC              Management, LLC
                                                  Its Managing Member

By:      /s/ Eileen McCarthy                  By:      /s/ Eileen McCarthy
    -----------------------------------           ------------------------------
    Eileen McCarthy, Member                       Eileen McCarthy, Member

Alta Embarcadero BioPharma, LLC


By:      /s/ Eileen McCarthy
    -----------------------------------
    Eileen McCarthy, Member


    /s/ Jean Deleage                               /s/ Guy Nohra
- ----------------------------------            ----------------------------------
Jean Deleage                                  Guy Nohra

    /s/ /Garrett Gruener                           /s/ Marino Polestra
- ----------------------------------            ----------------------------------
Garrett Gruener                               Marino Polestra

    /s/ Daniel Janney                              /s/ Alix Marduel
- ----------------------------------            ----------------------------------
Daniel Janney                                 Alix Marduel

                               Page 18 of 29 Pages

<PAGE>


                                    EXHIBIT E


                              CONNETICS CORPORATION
                          REGISTRATION RIGHTS AGREEMENT


         This Registration  Rights Agreement (the "Agreement") is made as of the
20th day of  November,  1998,  by and among  Connetics  Corporation,  a Delaware
corporation  (the "Company") and each of the persons listed on Exhibit A to this
Agreement (each an "Investor" and together the "Investors").


R E C I T A L S

         A. Effective as of the same date as this Agreement, the Company and the
Investors  have entered into a Common Stock  Purchase  Agreement  (the "Purchase
Agreement")  pursuant to which the  Company has agreed to sell to the  Investors
and the  Investors  have  agreed  to  purchase  from the  Company  shares of the
Company's  Common Stock (all terms not otherwise  defined  herein shall have the
meanings ascribed in the Purchase Agreement).

         B. A  condition  to  the  Investors'  obligations  under  the  Purchase
Agreement  is that the Company and the  Investors  enter into this  Agreement in
order to provide the Investors  with certain rights to register the Common Stock
acquired  by the  Investors  pursuant  to the  Purchase  Agreement.  The Company
desires to induce the  Investors to purchase  the Common  Stock  pursuant to the
Purchase  Agreement  by agreeing to the terms and  conditions  set forth in this
Agreement.

         NOW, THEREFORE, the parties hereby agree as follows:


AGREEMENT

         1.  Registration  Rights.  The Company and the  Investors  covenant and
agree as follows:

                  1.1 Definitions. For purposes of this Section 1:

                           (a)   The   terms   "register,"   "registered,"   and
"registration"  refer to a  registration  effected  by  preparing  and  filing a
registration statement or similar document in compliance with the Securities Act
of 1933, as amended (the  "Securities  Act"), and the declaration or ordering of
effectiveness of such registration statement or document;

                           (b) The term  "Registrable  Securities" means (i) the
shares of Common Stock issued or sold in connection with the Purchase  Agreement
(such  shares of Common  Stock are  collectively  referred to as the "Shares" or
"Stock") and (ii) any other shares of common stock of the Company  issued as (or
issuable upon the conversion or exercise of any warrant, right or other security
which is issued as) a dividend  or other  distribution  with  respect  to, or in
exchange  for or in  replacement  of, the Stock;  provided,  that 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.  Notwithstanding  the foregoing,  shares of common stock shall only be
treated as Registrable  Securities if and so long as they have not been (x) sold
to or through a broker or dealer or  underwriter in a public  distribution  or a
public  securities  transaction,  or (y) sold in a  transaction  exempt from the
registration  and  prospectus  delivery  requirements  under Section 4(1) of the
Securities Act so that all transfer  restrictions,  and restrictive legends with
respect thereto, if any, are removed upon the consummation of such sale;

                              Page 19 of 29 Pages

<PAGE>


                           (c) The number of shares of  "Registrable  Securities
then  outstanding"  shall be  determined by the number of shares of Common Stock
then outstanding which are Registrable Securities,  plus the number of shares of
common stock issuable  pursuant to then  exercisable  or convertible  securities
which are Registrable Securities;

                           (d) The term  "Holder"  means  any  person  owning or
having the right to acquire  Registrable  Securities or any assignee  thereof in
accordance with this Agreement;

                           (e) The term  "Form  S-3"  means  such form under the
Securities  Act as in effect on the date hereof or any successor  form under the
Securities Act; and

                           (f) The term "SEC" means the  Securities and Exchange
Commission.

                  1.2  Registration. The  Company will use its  reasonable  best
efforts  to  effect  a  registration  to  permit  the  sale  of the  Registrable
Securities as described below, and pursuant thereto the Company will:

                           (a)  prepare  and  file  within  20 days  and use its
reasonable  best  efforts to have  declared  effective by the SEC within 45 days
after the Closing,  a  registration  statement on Form S-3 relating to resale of
all of the shares of the  Registrable  Securities  and use its  reasonable  best
efforts to cause such registration  statement to remain  continuously  effective
for a period which will terminate  when all  Registrable  Securities  covered by
such  registration  statement,  as amended from time to time,  have been sold or
when  the  Registrable  Securities  may be sold  under  Rule  144(k)  under  the
Securities Act;

                           (b) prepare and file with the SEC such amendments and
post-effective  amendments to the  registration  statement and any prospectus as
may be necessary to keep such  registration  statement  effective for the period
specified in Section  1.2(a) and to comply with the provisions of the Securities
Act and the  Exchange Act with respect to the  distribution  of all  Registrable
Securities;

                           (c) notify each  Investor  promptly  and confirm such
notice in writing (i) when the  prospectus or any  supplement or  post-effective
amendment has been filed and, with respect to the registration  statement or any
post-effective  amendment,  when  the  same has  become  effective,  (ii) of any
request by the SEC for amendments or supplements to the  registration  statement
or prospectus or for additional information, (iii) of the issuance by the SEC of
any stop order suspending the effectiveness of the registration statement or the
initiation of any proceedings  for that purpose,  and (iv) of the receipt by the
Company of any notification  with respect to the suspension of the qualification
of the Registrable  Securities for sale in any jurisdiction or the initiation or
threatening of any proceeding for such purpose;

                           (d)  make  every  reasonable  effort  to  obtain  the
withdrawal  of any  order  suspending  the  effectiveness  of  the  registration
statement at the earliest possible moment;

                           (e)  furnish to each  Investor,  without  charge,  at
least one copy of the registration  statement and any  post-effective  amendment
thereto,  including financial  statements and schedules,  and upon an Investor's
request,  all  documents  incorporated  therein by  reference  and all  exhibits
thereto (including those incorporated by reference);

                           (f) deliver to each Investor, without charge, as many
copies  of the  prospectus  (including  each  preliminary  prospectus)  and  any
amendment or supplement thereto as such Investor may reasonably request in order
to facilitate the disposition of the Registrable Securities;

                           (g) cause all Registrable  Securities  covered by the
registration  statement  to be listed on each  securities  exchange or market on
which  similar  securities  issued by the  Company are then  listed,  and if the
securities  are not so listed to use its  reasonable  best  efforts  promptly to
cause all such  securities  to be listed on either the New York Stock  Exchange,
the American Stock Exchange or the Nasdaq Stock Market;

                              Page 20 of 29 Pages

<PAGE>


                           (h)  use  reasonable   best  efforts  to  qualify  or
register the  Registrable  Securities for sale under (or obtain  exemptions from
the application of) the Blue Sky laws of such  jurisdictions  as are applicable.
The Company shall not be required to qualify as a foreign corporation or to file
a general consent to service of process in any such jurisdiction where it is not
presently  qualified or where it would be subject to general  service of process
or taxation as a foreign  corporation in any jurisdiction where it is not now so
subject;

                           (i)  otherwise  use its  reasonable  best  efforts to
comply with all applicable rules and regulations of the SEC under the Securities
Act and the  Exchange  Act and take  such  other  actions  as may be  reasonably
necessary  to  facilitate  the   registration  of  the  Registrable   Securities
hereunder; and

                           (j)   expenses   incurred   in   connection   with  a
registration  requested  pursuant  to this  Section  1.2  shall  be borne by the
Company,  including  all  registration,  filing,  qualification,  printers'  and
accounting fees but excluding any underwriters' discounts or commissions and any
fees and  disbursements  of any counsel for the  selling  Holders  (such fees or
discounts,  if any,  to be borne pro rata by the  Holders  participating  in the
registration).

                  1.3   Restrictions;   Procedure   For  Sales   Pursuant  To  A
Registration Statement.

                           (a) Each Holder agrees to the following  restrictions
on and procedures for sales made pursuant to a registration statement:

                                    (i)  Notice  to   Company.   If  any  Holder
proposes to sell any Shares,  the Holder  shall notify the Company of its intent
to do so at least  three (3)  business  days prior to the date of such sale (the
"Notice of  Sale"),  by  tendering  a Notice of Sale in  substantially  the form
attached  as  Exhibit B.  Alternatively,  the Holder may give the Notice of Sale
verbally by telephoning  and speaking  directly with John L. Higgins or the then
current Chief Financial Officer at the Company at (650) 843-2800,  and following
up by immediately sending a written Notice of Sale. Providing the Notice of Sale
to the Company  shall  conclusively  be deemed to establish an agreement by such
Holder to comply with the  registration  provisions  herein  described,  and the
Notice  of Sale  shall  be  deemed  to  constitute  a  representation  that  any
information  previously  supplied  by such  Holder is accurate as of the date of
such Notice of Sale.

                                    (ii) Delay of Sale.  The  Company may refuse
to permit  the  Holder to resell  any  Shares  for a  specified  period of time;
provided,  however,  that (a) in order to exercise this right,  the Company must
deliver  a  certificate  in  writing  to the  Holder  to  the  effect  that  the
registration  statement in its then current form contains an untrue statement of
material fact or omits to state a material  fact  necessary in order to make the
statements  made therein,  in light of the  circumstances  under which they were
made, not misleading,  (b) in no event shall such delay exceed twenty (20) days,
(c) in no event  shall  this  right of delay be  exercised  on more than two (2)
occasions  in any twelve (12) month  period,  and (d) during any  suspension  as
contemplated by this Section 1.4 (a)(ii),  the Company will not allow any of its
officers or directors to buy or sell shares of the Company's securities.

                           (b)  Representations  of Holders.  Each Holder hereby
represents to and covenants with the Company that,  during the period in which a
registration statement effected pursuant to Section 1.2 remains effective,  such
Holder will:

                                    (i) not engage in any stabilization activity
in connection with any of the Company's securities;

                                    (ii) cause to be furnished to any  purchaser
of the Shares  and to the  broker-dealer,  if any,  through  whom  Shares may be
offered, a copy of the Prospectus; and

                              Page 21 of 29 Pages

<PAGE>


                                    (iii) not bid for or purchase any securities
of the Company or any rights to acquire the Company's securities,  or attempt to
induce any person to purchase any of the  Company's  securities or any rights to
acquire the Company's  securities  other than as permitted  under the Securities
Exchange Act of 1934, as amended ("Exchange Act").

                           (c) Information  for Use in  Registration  Statement.
Each  Holder  represents  and  warrants  to the  Company  that such  Holder  has
completed  the  information  requested  by the  Selling  Holder's  Questionnaire
attached  as Exhibit C to this  Agreement  (the  "Questionnaire"),  and  further
represents  and  warrants to the Company that all  information  provided by such
Holder  in the  Questionnaire  is  true,  accurate  and  complete.  Each  Holder
understands that the written  information in the  Questionnaire  and all written
representations  made  in this  Agreement  are  being  provided  to the  Company
specifically for use in, or in connection  with, the registration  statement and
the Prospectus, and has executed this Agreement with such knowledge.

                  1.4 Furnish Information.  It shall be a condition precedent to
the  obligations  of the Company to take any action  pursuant to this  Section 1
with  respect to the  Registrable  Securities  of any  selling  Holder that such
Holder  shall  furnish to the Company such  information  regarding  itself,  the
Registrable  Securities  held by it, and the intended  method of  disposition of
such securities as shall be required to effect the registration of such Holder's
Registrable Securities.

                  1.5 Delay of  Registration.  No Holder shall have any right to
obtain  or seek  an  injunction  restraining  or  otherwise  delaying  any  such
registration  as the result of any dispute  that might arise with respect to the
interpretation or implementation of this Section 1.

                  1.6 Indemnification.  In the event any Registrable  Securities
are included in a registration statement under this Section 1:

                           (a) To the extent  permitted by law, the Company will
indemnify  and hold  harmless each Holder,  any  underwriter  (as defined in the
Securities) for such Holder and each person, if any, who controls such Holder or
underwriter  within the meaning of the  Securities or the Exchange Act,  against
any losses, claims, damages, or liabilities (joint or several) to which they may
become subject under the Securities,  the Exchange Act or other federal or state
law,  insofar as such losses,  claims,  damages,  or liabilities  (or actions in
respect thereof) arise out of or are based upon any of the following statements,
omissions or violations  (collectively a "Violation"):  (i) any untrue statement
or alleged untrue  statement of a material fact  contained in such  registration
statement,  including any preliminary  prospectus or final prospectus  contained
therein or any amendments or supplements  thereto,  (ii) the omission or alleged
omission to state  therein a material  fact  required to be stated  therein,  or
necessary to make the statements therein not misleading,  or (iii) any violation
or alleged  violation by the Company of the  Securities,  the Exchange  Act, any
state securities law or any rule or regulation promulgated under the Securities,
the Exchange Act or any state  securities  law; and the Company will pay to each
such Holder,  underwriter or controlling person, as incurred, any legal or other
expenses  reasonably  incurred  by  them in  connection  with  investigating  or
defending any such loss, claim, damage, liability, or action; provided, however,
that the indemnity agreement contained in this subsection 1.6(a) shall not apply
to amounts paid in settlement of any such loss,  claim,  damage,  liability,  or
action if such settlement is effected  without the consent of the Company (which
consent shall not be unreasonably withheld),  nor shall the Company be liable in
any such case for any such  loss,  claim,  damage,  liability,  or action to the
extent  that it  arises  out of or is based  upon a  Violation  which  occurs in
reliance upon and in conformity with written information furnished expressly for
use in connection  with such  registration  by any such Holder,  underwriter  or
controlling person.

                           (b) To the  extent  permitted  by law,  each  selling
Holder will indemnify and hold harmless the Company, each of its directors, each
of its officers who has signed the registration statement,  each person, if any,
who controls the Company within the meaning of the Securities,  any underwriter,
any other

                              Page 22 of 29 Pages

<PAGE>


Holder selling  securities in such  registration  statement and any  controlling
person of any such  underwriter  or other  Holder,  against any losses,  claims,
damages, or liabilities (joint or several) to which any of the foregoing persons
may become subject,  under the Securities,  the Exchange Act or other federal or
state law, insofar as such losses,  claims,  damages, or liabilities (or actions
in respect  thereto) arise out of or are based upon any Violation,  in each case
to the extent (and only to the extent)  that such  Violation  occurs in reliance
upon  and in  conformity  with  written  information  furnished  by such  Holder
expressly for use in  connection  with such  registration;  and each such Holder
will pay, as incurred,  any legal or other expenses  reasonably  incurred by any
person  intended  to be  indemnified  pursuant  to this  subsection  1.6(b),  in
connection  with  investigating  or  defending  any such  loss,  claim,  damage,
liability, or action; provided,  however, that the indemnity agreement contained
in this  subsection  1.6(b) shall not apply to amounts paid in settlement of any
such loss,  claim,  damage,  liability or action if such  settlement is effected
without the  consent of the  Holder,  which  consent  shall not be  unreasonably
withheld;  provided, that, in no event shall any indemnity under this subsection
1.6(b) exceed the net proceeds from the offering received by such Holder, except
in the case of willful fraud by such Holder.

                           (c) Promptly  after receipt by an  indemnified  party
under this Section 1.6 of notice of the  commencement  of any action  (including
any governmental  action),  such  indemnified  party will, if a claim in respect
thereof is to be made  against any  indemnifying  party under this  Section 1.6,
deliver to the indemnifying  party a written notice of the commencement  thereof
and the  indemnifying  party shall have the right to participate in, and, to the
extent the indemnifying  party so desires,  jointly with any other  indemnifying
party similarly  noticed,  to assume the defense  thereof with counsel  mutually
satisfactory  to the  parties;  provided,  however,  that an  indemnified  party
(together with all other  indemnified  parties which may be represented  without
conflict by one counsel)  shall have the right to retain one  separate  counsel,
with the reasonable fees and expenses to be paid by the  indemnifying  party, if
representation  of  such  indemnified  party  by  the  counsel  retained  by the
indemnifying  party would be inappropriate due to actual or potential  differing
interests between such indemnified party and any other party represented by such
counsel  in such  proceeding.  The  failure  to  deliver  written  notice to the
indemnifying  party within a  reasonable  time of the  commencement  of any such
action, if prejudicial to its ability to defend such action,  shall relieve such
indemnifying  party of any liability to the indemnified party under this Section
1.6, but the omission so to deliver  written  notice to the  indemnifying  party
will not relieve it of any liability that it may have to any  indemnified  party
otherwise than under this Section 1.6.

                           (d)  If the  indemnification  provided  for  in  this
Section 1.6 is held by a court of competent jurisdiction to be unavailable to an
indemnified party with respect to any loss, liability, claim, damage, or expense
referred to therein,  then the indemnifying  party, in lieu of indemnifying such
indemnified  party hereunder,  shall contribute to the amount paid or payable by
such indemnified party as a result of such loss,  liability,  claim,  damage, or
expense in such  proportion as is  appropriate  to reflect the relative fault of
the indemnifying party on the one hand and of the indemnified party on the other
in  connection  with the  statements  or omissions  that  resulted in such loss,
liability,  claim,  damage,  or expense as well as any other relevant  equitable
considerations;  provided that, in no event shall any  contribution  by a Holder
under this Subsection  1.6(d) exceed the net proceeds from the offering received
by such Holder, except in the case of willful fraud by such Holder. The relative
fault of the indemnifying party and of the indemnified party shall be determined
by  reference  to,  among other  things,  whether  the untrue or alleged  untrue
statement of a material fact or the omission to state a material fact relates to
information  supplied by the indemnifying  party or by the indemnified party and
the parties' relative intent, knowledge, access to information,  and opportunity
to correct or prevent such statement or omission.

                           (e) The  obligations of the Company and Holders under
this Section 1.6 shall  survive the  completion  of any offering of  Registrable
Securities in a registration statement under this Section 1.

                  1.7 Reports Under Securities Exchange Act Of 1934. With a view
to making  available  to the Holders the benefits of Rule 144 and any other rule
or regulation of the SEC that may at any time permit

                              Page 23 of 29 Pages

<PAGE>


a Holder to sell securities of the Company to the public without registration or
pursuant to a registration on Form S-3, the Company agrees to:


                           (a) make and keep public  information  available,  as
those  terms are  understood  and  defined in Rule 144,  so long as the  Company
remains  subject to the periodic  reporting  requirements  under  Sections 13 or
15(d) of the Exchange Act;

                           (b)  take  such  action,   including   the  voluntary
registration  of its Common Stock under  Section 12 of the  Exchange  Act, as is
necessary  to  enable  the  Holders  to  utilize  Form S-3 for the sale of their
Registrable Securities;

                           (c) file with the SEC in a timely  manner all reports
and  other  documents  required  of the  Company  under the  Securities  and the
Exchange Act; and

                           (d) furnish to any Holder, so long as the Holder owns
any Registrable  Securities,  forthwith upon request (i) a written  statement by
the Company that it has complied with the reporting requirements of the Exchange
Act and the rules and regulations promulgated  thereunder,  or that it qualifies
as a registrant whose securities may be resold pursuant to Form S-3, (ii) a copy
of the most  recent  annual or  quarterly  report of the  Company and such other
reports and documents so filed by the Company,  and (iii) such other information
as may be reasonably  requested in availing any Holder of any rule or regulation
of the SEC which permits the selling of any such securities without registration
or pursuant to such form.

         2. MISCELLANEOUS.

                  2.1  Successors and Assigns.  Except as otherwise  provided in
this  Agreement,  the terms and conditions of this Agreement  shall inure to the
benefit of and be binding  upon the  respective  successors  and  assigns of the
parties (including transferees of any of the Shares). 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.

                  2.2   Governing   Law.   This   Agreement  and  all  acts  and
transactions  pursuant  hereto shall be governed,  construed and  interpreted in
accordance  with the laws of the State of  California,  without giving effect to
principles of conflicts of laws.

                  2.3 Counterparts. This Agreement may be executed in two (2) or
more counterparts,  each of which shall be deemed an original,  but all of which
together shall constitute one and the same instrument.

                  2.4 Titles and  Subtitles.  The titles and  subtitles  used in
this  Agreement  are used for  convenience  only and are not to be considered in
construing or interpreting this Agreement.

                  2.5 Notices.  Unless  otherwise  provided  herein,  any notice
required or permitted by this Agreement  shall be in writing and shall be deemed
sufficient upon delivery,  when delivered personally or by overnight courier and
addressed  to the party to be notified at such  party's  address as set forth on
the signature page hereto or as subsequently  modified by written notice. In the
event that any date provided for in this Agreement  falls on a Saturday,  Sunday
or legal holiday,  such date shall be deemed  extended to the next business day.
Notwithstanding  the foregoing,  any notice delivered pursuant to Section 1.3(e)
or Section 1.4 hereto must be made by personal  delivery or confirmed  facsimile
transmission.

                              Page 24 of 29 Pages

<PAGE>


                  2.6  Expenses.  If any action at law or in equity is necessary
to enforce or interpret the terms of this Agreement,  the prevailing party shall
be entitled to reasonable attorneys' fees, costs and necessary  disbursements in
addition to any other relief to which such party may be entitled.

                  2.7 Amendments and Waivers.  Any term of this Agreement may be
amended and the  observance of any term of this  Agreement may be waived (either
generally   or  in  a   particular   instance   and  either   retroactively   or
prospectively),  only with the written consent of the Company and the holders of
a majority of the  Registrable  Securities  then  outstanding.  Any amendment or
waiver  effected in accordance  with this  paragraph  shall be binding upon each
holder of any Registrable Securities then outstanding, each future holder of all
such Registrable Securities, and the Company.

                  2.8 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.

                  2.9  Entire  Agreement.  This  Agreement,  and  the  documents
referred to in this Agreement (with the exception of the registration statement)
constitute the entire  agreement  between the parties  hereto  pertaining to the
subject matter hereof, and any and all other written or oral agreements existing
between the parties hereto are expressly canceled.

                              Page 25 of 29 Pages

<PAGE>


IN WITNESS WHEREOF, the parties have executed this Registration Rights Agreement
as of the date first written above.


                                    "COMPANY"

Connetics Corporation                               Address:

                                                    3400 West Bayshore Road
                                                    Palo Alto, California 94303
By:  ____________________________                   Facsimile:  (650) 843-2899
         Thomas G. Wiggans
         President and Chief Executive Officer


                                   INVESTOR(S)

Alta BioPharma Partners, L.P.
By:  Alta BioPharma Management Partners, L.P.

By:  ____________________________
         General Partner


Connetics Partners (AltaBio), LLC

By:  ____________________________
         Member



Alta Embarcadero BioPharma, LLC

By:  ____________________________
         Member

Address:          Alta Partners
                  One Embarcadero Center
                  Suite 4050
                  San Francisco, CA  94111

                              Page 26 of 29 Pages

<PAGE>


                                    EXHIBIT A
                                LIST OF INVESTORS



Name                                                            Number of Shares
- ----                                                            ----------------








                              Page 27 of 29 Pages

<PAGE>


                                    EXHIBIT B



                              CONNETICS CORPORATION

                                 NOTICE OF SALE

         Pursuant   to  the   Registration   Rights   Agreement   dated   as  of
_______________,   1998  among  Connetics   Corporation  (the  "Company"),   the
undersigned  and certain  stockholders of the Company,  the  undersigned  hereby
gives notice to the Company of the  undersigned's  intent to sell _______ shares
of the Company's Common Stock registered pursuant to the registration  statement
(File No. _______) filed pursuant to such Agreement.



Dated:   ___________________            By:_____________________________________
                                                      (signature)


                                        Name:___________________________________
                                                        (print)


                                        Title:__________________________________
                                                    (if applicable)


[NOTE: THIS NOTICE OF SALE MUST BE COMPLETED AND DELIVERED (BY PERSONAL DELIVERY
OR   FACSIMILE)   TO  THE   CHIEF   FINANCIAL   OFFICER   OF  THE   COMPANY   ON
_____________________.  19__,  OR THREE (3) BUSINESS DAY BEFORE THE DATE OF SALE
OF  THE  SHARES  OF  THE  COMPANY'S  COMMON  STOCK  REGISTERED  PURSUANT  TO THE
REGISTRATION STATEMENT.]

                              Page 28 of 29 Pages

<PAGE>


                                    EXHIBIT C

                              CONNETICS CORPORATION
                       SELLING STOCKHOLDER'S QUESTIONNAIRE

         In  connection   with  the  Connetics   Corporation   (the   "Company")
Registration Statement (File No. _______________)  registering certain shares of
the Company's  Common Stock,  the  undersigned  represents and warrants that the
information set forth below is true, accurate and complete:

         1. As of the date  hereof,  the  undersigned  beneficially  owns ______
shares of the Company's Common Stock.

         2. Except as described  below,  the  undersigned has not had a material
relationship  with the Company or any of its  predecessors or affiliates  within
the last three years.

         The term "material relationship" has not been defined by the Securities
and Exchange Commission (the "SEC"). However, the SEC has indicated that it will
probably construe as a "material  relationship" any relationship  which tends to
prevent arms length bargaining in dealings with a company,  whether arising from
a close business connection or family relationship, a relationship of control or
otherwise.  It seems prudent,  therefore, to consider that the undersigned would
have  such a  relationship,  for  example,  with any  organization  of which the
undersigned  is an  officer,  director,  trustee  or  partner  or in  which  the
undersigned  owns,  directly or  indirectly,  ten  percent  (10%) or more of the
outstanding voting stock, or in which the undersigned has some other substantial
interest,  and with any person or organization with whom the undersigned has, or
with whom any  relative  or spouse (or any other  person or  organization  as to
which the  undersigned  has any of the  foregoing  other  relationships)  has, a
contractual relationship.

         If  applicable,  please  describe  the material  relationship  with the
Company:


Dated:   ___________________            By:_____________________________________
                                                      (signature)


                                        Name:___________________________________
                                                        (print)


                                        Title:__________________________________
                                                    (if applicable)

                              Page 29 of 29 Pages



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