TRIANGLE PHARMACEUTICALS INC
SC 13G, 1998-03-06
PHARMACEUTICAL PREPARATIONS
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                                  UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549

                                  SCHEDULE 13G

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

                         TRIANGLE PHARMACEUTICALS, INC.
                -----------------------------------------------
                                (Name of Issuer)

                         Common Stock, $0.001 Par Value
                    ----------------------------------------
                         (Title of Class of Securities)

                                    89589H104
                           --------------------------
                                 (CUSIP Number)

                                  March 6, 1998
                     --------------------------------------
                      (Date of Event which Requires Filing
                               of this Statement)

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

                  [  ]     Rule 13d-1(b)
                  [X]      Rule 13d-1(c)
                  [  ]     Rule 13d-1(d)


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

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





                         Continued on following page(s)
                               Page 1 of 22 Pages
                             Exhibit Index: Page 17


<PAGE>


                                  SCHEDULE 13G

CUSIP No. 89589H104                                           Page 2 of 22 Pages




1        Name of Reporting Person
         I.R.S. Identification No. of Above Persons (ENTITIES ONLY)

                  QUANTUM INDUSTRIAL PARTNERS LDC

2        Check the Appropriate Box If a Member of a Group*
                                                     a.  [_]
                                                     b.  [x]
3        SEC Use Only

4        Citizenship or Place of Organization

                  CAYMAN ISLANDS

                           5        Sole Voting Power
 Number of                                1,000,000
   Shares
Beneficially               6        Shared Voting Power
  Owned By                                0
    Each
  Reporting                7        Sole Dispositive Power
   Person                                 1,000,000
    With
                           8        Shared Dispositive Power
                                          0

9        Aggregate Amount Beneficially Owned by Each Reporting Person

                                            1,000,000

10       Check Box If the Aggregate  Amount in Row (9) Excludes  Certain Shares*
         [x]

11       Percent of Class Represented By Amount in Row (9)

                                    5.00%

12       Type of Reporting Person*

                  OO; IV
            
                     * SEE INSTRUCTIONS BEFORE FILLING OUT!


<PAGE>


                                  SCHEDULE 13G

CUSIP No. 89589H104                                           Page 3 of 22 Pages




1        Name of Reporting Person
         I.R.S. Identification No. of Above Persons (ENTITIES ONLY)

                  QIH MANAGEMENT INVESTOR, L.P.

2        Check the Appropriate Box If a Member of a Group*
                                                     a.  [_]
                                                     b.  [x]
3        SEC Use Only

4        Citizenship or Place of Organization

                  DELAWARE

                           5        Sole Voting Power
 Number of                                1,000,000
   Shares
Beneficially               6        Shared Voting Power
  Owned By                                0
    Each
  Reporting                7        Sole Dispositive Power
   Person                                 1,000,000
    With
                           8        Shared Dispositive Power
                                          0

9        Aggregate Amount Beneficially Owned by Each Reporting Person

                                            1,000,000

10       Check Box If the Aggregate  Amount in Row (9) Excludes  Certain Shares*
         [x]

11       Percent of Class Represented By Amount in Row (9)

                                    5.00%

12       Type of Reporting Person*

                  PN; IA
            
                     * SEE INSTRUCTIONS BEFORE FILLING OUT!


<PAGE>


                                  SCHEDULE 13G

CUSIP No. 89589H104                                           Page 4 of 22 Pages




1        Name of Reporting Person
         I.R.S. Identification No. of Above Persons (ENTITIES ONLY)

                  QIH MANAGEMENT, INC.

2        Check the Appropriate Box If a Member of a Group*
                                                     a.  [_]
                                                     b.  [x]
3        SEC Use Only

4        Citizenship or Place of Organization

                  DELAWARE

                           5        Sole Voting Power
 Number of                                1,000,000
   Shares
Beneficially               6        Shared Voting Power
  Owned By                                0
    Each
  Reporting                7        Sole Dispositive Power
   Person                                 1,000,000
    With
                           8        Shared Dispositive Power
                                          0

9        Aggregate Amount Beneficially Owned by Each Reporting Person

                                            1,000,000

10       Check Box If the Aggregate  Amount in Row (9) Excludes  Certain Shares*
         [x]

11       Percent of Class Represented By Amount in Row (9)

                                    5.00%

12       Type of Reporting Person*

                  CO
            
                     * SEE INSTRUCTIONS BEFORE FILLING OUT!


<PAGE>


                                  SCHEDULE 13G

CUSIP No. 89589H104                                           Page 5 of 22 Pages




1        Name of Reporting Person
         I.R.S. Identification No. of Above Persons (ENTITIES ONLY)

                  SOROS FUND MANAGEMENT LLC

2        Check the Appropriate Box If a Member of a Group*
                                                     a.  [_]
                                                     b.  [x]

3        SEC Use Only

4        Citizenship or Place of Organization

                  DELAWARE

                           5        Sole Voting Power
 Number of                                1,989,500
   Shares
Beneficially               6        Shared Voting Power
  Owned By                                0
    Each
  Reporting                7        Sole Dispositive Power
   Person                                 1,989,500
    With
                           8        Shared Dispositive Power
                                          0

9        Aggregate Amount Beneficially Owned by Each Reporting Person

                                            1,989,500

10       Check Box If the Aggregate  Amount in Row (9) Excludes  Certain Shares*
         [x]

11       Percent of Class Represented By Amount in Row (9)

                                    9.95%

12       Type of Reporting Person*

                  OO; IA

                     * SEE INSTRUCTIONS BEFORE FILLING OUT!



<PAGE>


                                  SCHEDULE 13G

CUSIP No. 89589H104                                           Page 6 of 22 Pages



1        Name of Reporting Person
         I.R.S. Identification No. of Above Persons (ENTITIES ONLY)

                  GEORGE SOROS (in the capacity described herein)

2        Check the Appropriate Box If a Member of a Group*
                                                     a.  [_]
                                                     b.  [x]
3        SEC Use Only

4        Citizenship or Place of Organization

                  UNITED STATES

                           5        Sole Voting Power
 Number of                                0
   Shares
Beneficially               6        Shared Voting Power
  Owned By                                1,989,500
    Each
  Reporting                7        Sole Dispositive Power
   Person                                 0
    With
                           8        Shared Dispositive Power
                                          1,989,500

9        Aggregate Amount Beneficially Owned by Each Reporting Person

                                            1,989,500

10       Check Box If the Aggregate  Amount in Row (9) Excludes  Certain Shares*
         [x]

11       Percent of Class Represented By Amount in Row (9)

                                    9.95%

12       Type of Reporting Person*

                  IA

                     * SEE INSTRUCTIONS BEFORE FILLING OUT!



<PAGE>


                                  SCHEDULE 13G

CUSIP No. 89589H104                                           Page 7 of 22 Pages



1        Name of Reporting Person
         I.R.S. Identification No. of Above Persons (ENTITIES ONLY)

                  STANLEY F. DRUCKENMILLER (in the capacity described herein)

2        Check the Appropriate Box If a Member of a Group*
                                                     a.  [_]
                                                     b.  [x]
3        SEC Use Only

4        Citizenship or Place of Organization

                  UNITED STATES

                           5        Sole Voting Power
 Number of                                800,000
   Shares
Beneficially               6        Shared Voting Power
  Owned By                                1,989,500
    Each
  Reporting                7        Sole Dispositive Power
   Person                                 800,000
    With
                           8        Shared Dispositive Power
                                          1,989,500

9        Aggregate Amount Beneficially Owned by Each Reporting Person

                                            2,789,500

10       Check Box If the Aggregate  Amount in Row (9) Excludes  Certain Shares*
         [_]

11       Percent of Class Represented By Amount in Row (9)

                                    13.95%

12       Type of Reporting Person*

                  IA
            
                     * SEE INSTRUCTIONS BEFORE FILLING OUT!


<PAGE>


                                  SCHEDULE 13G

CUSIP No. 89589H104                                           Page 8 of 22 Pages



1        Name of Reporting Person
         I.R.S. Identification No. of Above Persons (ENTITIES ONLY)

                  Duquesne Capital Management, L.L.C.

2        Check the Appropriate Box If a Member of a Group*
                                                     a.  [_]
                                                     b.  [x]
3        SEC Use Only

4        Citizenship or Place of Organization

                  PENNSYLVANIA

                           5        Sole Voting Power
 Number of                               800,000
   Shares
Beneficially               6        Shared Voting Power
  Owned By                               0
    Each
  Reporting                7        Sole Dispositive Power
   Person                                800,000
    With
                           8        Shared Dispositive Power
                                         0

9        Aggregate Amount Beneficially Owned by Each Reporting Person

                                            800,000

10       Check Box If the Aggregate  Amount in Row (9) Excludes  Certain Shares*
         [x]

11       Percent of Class Represented By Amount in Row (9)

                                    4.00%

12       Type of Reporting Person*

                  OO; IA
            
                     * SEE INSTRUCTIONS BEFORE FILLING OUT!


<PAGE>


                                                              Page 9 of 22 Pages


Item 1(a)           Name of Issuer:

                    Triangle Pharmaceuticals, Inc. (the "Issuer").

Item 1(b)           Address of the Issuer's Principal Executive Offices:

                    4 University  Place, 4611 University  Drive,  Durham,  North
                    Carolina, 27707.

Item 2(a)           Name of Person Filing:

                    This  statement is filed on behalf of each of the  following
                    persons (collectively, the "Reporting Persons"):

                    i)   Quantum  Industrial  Partners  LDC,  a  Cayman  Islands
                         exempted limited duration company ("QIP");

                    ii)  QIH  Management  Investor,  L.P.,  a  Delaware  limited
                         partnership ("QIHMI");

                    iii) QIH  Management,  Inc.,  a Delaware  corporation  ("QIH
                         Management");

                    iv)  Soros Fund Management LLC, a Delaware limited liability
                         company ("SFM LLC");

                    v)   Mr. George Soros ("Mr. Soros");

                    vi)  Mr. Stanley F. Druckenmiller ("Mr. Druckenmiller"); and

                    vii) Duquesne  Capital  Management,  L.L.C.,  a Pennsylvania
                         limited liability company ("Duquesne LLC").

                    This  Statement  relates to Shares (as defined  herein) held
for the accounts of Quantum  Partners  LDC, a Cayman  Islands  exempted  limited
duration company ("Quantum  Partners"),  Quasar  International  Partners C.V., a
Netherlands  Antilles  limited  partnership  ("Quasar  Partners"),  QIP, and the
Duquesne LLC Clients (as defined herein).

                    SFM LLC, a Delaware  limited  liability  company,  serves as
principal  investment  manager to Quantum Partners and Quasar  Partners,  and as
such,  has  been  granted  investment  discretion  over  portfolio  investments,
including  the  Shares,  held for the  accounts of Quantum  Partners  and Quasar
Partners.  QIHMI,  an  investment  advisory  firm,  is  vested  with  investment
discretion  over the Shares held for the account of QIP.  Mr.  Soros is the sole
shareholder  of QIH  Management,  the sole  general  partner  of  QIHMI  and the
Chairman  of SFM LLC.  Mr.  Druckenmiller  is the Lead  Portfolio  Manager and a
member of the management committee of SFM LLC. Mr. Druckenmiller also owns a 75%
interest in, and is the sole  managing  member of,  Duquesne  LLC, an investment
advisory  firm that serves as a  discretionary  investment  advisor to a limited
number of institutional  clients (the "Duquesne  Clients").




<PAGE>


                                                             Page 10 of 22 Pages


Item 2(b)           Address of Principal Business Office or, if None, Residence:

                    The  address  of the  principal  business  office of each of
QIHMI, QIH Management,  SFM LLC, Mr. Soros and Mr.  Druckenmiller is 888 Seventh
Avenue,  33rd Floor, New York, NY 10106.  The address of the principal  business
office of QIP is Kaya Flamboyan 9, Willemstad,  Curacao,  Netherlands  Antilles.
The address of the principal  business office of Duquesne LLC is 2579 Washington
Road, Suite 322, Pittsburgh, Pennsylvania 15241-2591.

Item 2(c)           Citizenship:

                    i)   QIP  is a  Cayman  Islands  exempted  limited  duration
                         company;

                    ii)  QIHMI is a Delaware limited partnership;

                    iii) QIH Management is a Delaware corporation;

                    iv)  SFM LLC is a Delaware limited liability company;

                    v)   Mr. Soros is a United States citizen;

                    vi)  Mr. Druckenmiller is a United States citizen; and

                    vii) Duquesne  LLC  is  a  Pennsylvania   limited  liability
                         company.

Item 2(d)           Title of Class of Securities:

                         Common Stock, $0.001 par value (the "Shares").

Item 2(e)           CUSIP Number:

                         89589H104

Item 3.             If this  statement is filed  pursuant to Rule  13d-1(b),  or
                    13d-2(b), check whether the person filing is a:

                         This Item 3 is not applicable.

Item 4.             Ownership:

Item 4(a)           Amount Beneficially Owned:

                         As of March 5, 1998 each of the  Reporting  Persons may
                         be deemed the beneficial  owner of the following number
                         of Shares:

                         i)   Each  of QIP,  QIHMI  and  QIH  Management  may be
                              deemed  the  beneficial  owner  of  the  1,000,000
                              Shares held for the account of QIP.

                         (ii) Each of SFM LLC and Mr.  Soros may be  deemed  the
                              beneficial owner of 1,989,500 Shares.  This number



<PAGE>


                                                             Page 11 of 22 Pages

                              includes (A) 1,000,000 Shares held for the account
                              of QIP, (B) 964,500 Shares held for the account of
                              Quantum  Partners  and (C) 25,000  Shares held for
                              the account of Quasar Partners.

                         (iii) Mr. Druckenmiller  may be deemed  the  beneficial
                              owner of 2,789,500 Shares. This number consists of
                              (A) 1,000,000  Shares held for the account of QIP,
                              (B) 964,500 Shares held for the account of Quantum
                              Partners,  (C) 25,000  Shares held for the account
                              of Quasar Partners and (D) 800,000 Shares held for
                              the accounts of the Duquesne LLC Clients.

                         (iv) Duquesne LLC may be deemed the beneficial owner of
                              the  800,000  Shares held for the  accounts of the
                              Duquesne LLC Clients.


Item 4(b)           Percent of Class:

                         i)   The number of Shares of which  each of QIP,  QIHMI
                              and QIH may be deemed to be the  beneficial  owner
                              constitutes   approximately  5.00%  of  the  total
                              number of Shares outstanding.

                         ii)  The  number  of  Shares  of which  SFM LLC and Mr.
                              Soros  may be deemed  to be the  beneficial  owner
                              constitutes   approximately  9.95%  of  the  total
                              number of Shares outstanding.

                         iii) The  number of  Shares of which Mr.  Druckenmiller
                              may  be   deemed  to  be  the   beneficial   owner
                              constitutes  approximately  13.95%  of  the  total
                              number of Shares outstanding.

                         iv)  The number of Shares of which  Duquesne LLC may be
                              deemed  to be  the  beneficial  owner  constitutes
                              approximately  4.00% of the total number of Shares
                              outstanding.

Item 4(c)           Number of shares as to which such person has:

          QIP
          ---

          (i)  Sole power to vote or to direct the vote:               1,000,000

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

          (iii) Sole power to dispose or to direct the disposition of: 1,000,000

          (iv) Shared power to dispose or to direct the disposition of:        0



<PAGE>


                                                             Page 12 of 22 Pages


          QIHMI
          -----

          (i)  Sole power to vote or to direct the vote:               1,000,000

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

          (iii) Sole power to dispose or to direct the disposition of: 1,000,000

          (iv) Shared power to dispose or to direct the disposition of:        0

          QIH
          ---

          (i)  Sole power to vote or to direct the vote:               1,000,000

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

          (iii) Sole power to dispose or to direct the disposition of: 1,000,000

          (iv) Shared power to dispose or to direct the disposition of:        0

          SFM LLC
          -------

          (i)  Sole power to vote or to direct the vote:               1,989,500

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

          (iii) Sole power to dispose or to direct the disposition of: 1,989,500

          (iv) Shared power to dispose or to direct the disposition of:        0

          Mr. Soros
          ---------

          (i)  Sole power to vote or to direct the vote:                       0

          (ii) Shared power to vote or to direct the vote:             1,989,500

          (iii) Sole power to dispose or to direct the disposition of:         0

          (iv) Shared power to dispose or to direct the disposition of:1,989,500

          Mr. Druckenmiller
          -----------------

          (i)  Sole power to vote or to direct the vote:                 800,000

          (ii) Shared power to vote or to direct the vote:             1,989,500

          (iii) Sole power to dispose or to direct the disposition of:   800,000


<PAGE>


                                                             Page 13 of 22 Pages



          (iv) Shared  power  to  dispose  or  to  direct  the  disposition  of:
                                                                       1,989,500

          Duquesne LLC
          ------------

          (i)  Sole power to vote or to direct the vote:                 800,000

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

          (iii) Sole power to dispose or to direct the disposition of:   800,000

          (iv) Shared power to dispose or to direct the disposition of:        0

Item 5.             Ownership of Five Percent or Less of a Class:

                         This Item 5 is not applicable.

Item 6.             Ownership  of More than Five  Percent  on Behalf of  Another
                    Person:

                    (i)  The shareholders of QIP,  including Quantum  Industrial
Holdings,  Ltd., a British Virgin Islands  international  business company, have
the right to participate in the receipt of dividends  from, or proceeds from the
sale of,  the  Shares  held for the  account  of QIP in  accordance  with  their
ownership interests in QIP.

                    (ii) The shareholders of Quantum Partners, including Quantum
Fund N.V., a Netherlands Antilles company,  have the right to participate in the
receipt of dividends  from,  or proceeds  from the sale of, the Shares,  held by
Quantum  Partners  in  accordance  with  their  ownership  interests  in Quantum
Partners.

                    (iii) The partners  of  Quasar  Partners,  including  Quasar
International Fund N.V., a Netherlands Antilles  corporation,  have the right to
participate  in the receipt of  dividends  from,  or proceeds  from the sale of,
securities  held  by  Quasar  Partners  in  accordance  with  their  partnership
interests in Quasar Partners.

                    (iv) The Duquesne LLC Clients have the right to  participate
in the receipt of dividends from, or proceeds from the sale of, the Shares, held
for their account.

                    Each of QIP,  QIHMI and QIH Management  expressly  disclaims
beneficial  ownership  of any Shares held  directly  for the accounts of Quantum
Partners,  Quasar  Partners  and the Duquesne  Clients.  Each of SFM LLC and Mr.
Soros expressly  disclaim  beneficial  ownership of any Shares held directly for
the  accounts  of  the  Duquesne  Clients.   Duquesne  LLC  expressly  disclaims
beneficial  ownership  of any  Shares  held  for the  accounts  of QIP,  Quantum
Partners and Quasar Partners.


Item 7.             Identification  and  Classification  of the Subsidiary Which
                    Acquired  the  Security  Being  Reported  on by  the  Parent
                    Holding Company:

                         This Item 7 is not applicable.



<PAGE>


                                                             Page 14 of 22 Pages


Item 8.             Identification and Classification of Members of the Group:

                         This Item 8 is not applicable.

Item 9.             Notice of Dissolution of Group:

                         This Item 9 is not applicable.

Item 10.            Certification:

                    By signing below each signatory  certifies that, to the best
of his/its  knowledge  and  belief,  the  securities  referred to above were not
acquired  and are not held for the  purpose of or with the effect of changing or
influencing  the control of the Issuer of the  securities  and were not acquired
and are not  held in  connection  with or as a  participant  in any  transaction
having that purpose or effect.


<PAGE>


                                                             Page 15 of 22 Pages


                                   SIGNATURES


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

Date:  March 6, 1998                    QUANTUM INDUSTRIAL PARTNERS LDC

                                        By:  /S/ MICHAEL C. NEUS
                                             ----------------------------------
                                             Michael C. Neus
                                             Attorney-in-Fact


Date:  March 6, 1998                    QIH MANAGEMENT INVESTOR, L.P.

                                        By:  QIH Management, Inc.,
                                             its General Partner

                                             By:  /S/ MICHAEL C. NEUS
                                                  -----------------------------
                                                  Michael C. Neus
                                                  Vice President


Date:  March 6, 1998                    QIH MANAGEMENT, INC.

                                        By:  /S/ MICHAEL C. NEUS
                                             ----------------------------------
                                             Michael C. Neus
                                             Vice President



Date:  March 6, 1998                    SOROS FUND MANAGEMENT LLC

                                        By:  /S/ MICHAEL C. NEUS
                                             ----------------------------------
                                             Michael C. Neus
                                             Assistant General Counsel


Date:  March 6, 1998                    GEORGE SOROS

                                        By:  /S/ MICHAEL C. NEUS
                                             ----------------------------------
                                             Michael C. Neus
                                             Attorney-in-Fact


<PAGE>


                                                             Page 16 of 22 Pages


Date:  March 6, 1998                    STANLEY F. DRUCKENMILLER

                                        By:  /S/ MICHAEL C. NEUS
                                             ----------------------------------
                                             Michael C. Neus
                                             Attorney-in-Fact


Date:  March 6, 1998                    DUQUESNE CAPITAL MANAGEMENT, L.L.C.

                                        By:  /S/ GERALD KERNER
                                             ----------------------------------
                                             Gerald Kerner
                                             Managing Director




<PAGE>


                                                             Page 17 of 22 Pages



                                  EXHIBIT INDEX

                                                                        Page No.
                                                                        --------

A.        Power of Attorney  dated as of January 1, 1997  granted
          by Mr.  George Soros in favor of Mr. Sean C. Warren and
          Mr. Michael C. Neus....................................          18

B.        Power of Attorney  dated as of January 1, 1997  granted
          by Mr. Stanley F. Druckenmiller in favor of Mr. Sean C.
          Warren and Mr. Michael C. Neus.........................          19

C.        Power of Attorney  dated May 23, 1996 granted by QIP in
          favor of Mr.  Gary  Gladstein,  Mr. Sean Warren and Mr.
          Michael Neus...........................................          20

D.        Joint Filing Agreement dated March 6, 1998 by and among
          QIP,  QIHMI,  QIH Management,  SFM LLC, Mr. Soros,  Mr.
          Druckenmiller and Duquesne LLC.........................          21






                                                             Page 18 of 22 Pages



                                    EXHIBIT A

                                POWER OF ATTORNEY


KNOW ALL MEN BY THESE PRESENTS,  that I, GEORGE SOROS,  hereby make,  constitute
and appoint each of SEAN C. WARREN and MICHAEL C. NEUS, acting individually,  as
my agent and attorney-in-fact for the purpose of executing in my name, (a) in my
personal  capacity or (b) in my capacity as Chairman  of,  member of or in other
capacities  with  Soros  Fund  Management  LLC,  all  documents,   certificates,
instruments,  statements,  filings and agreements ("documents") to be filed with
or  delivered  to any foreign or domestic  governmental  or  regulatory  body or
required or  requested  by any other  person or entity  pursuant to any legal or
regulatory  requirement  relating to the acquisition,  ownership,  management or
disposition of securities or other investments, and any other documents relating
or ancillary  thereto,  including but not limited to, all documents  relating to
filings with the United States  Securities and Exchange  Commission  (the "SEC")
pursuant to the Securities  Act of 1933 or the  Securities  Exchange Act of 1934
(the "Act") and the rules and regulations promulgated thereunder, including: (1)
all documents relating to the beneficial  ownership of securities required to be
filed  with  the SEC  pursuant  to  Section  13(d) or  Section  16(a) of the Act
including, without limitation: (a) any acquisition statements on Schedule 13D or
Schedule  13G and  any  amendments  thereto,  (b) any  joint  filing  agreements
pursuant to Rule  13d-1(f) and (c) any initial  statements  of, or statements of
changes in,  beneficial  ownership of securities on Form 3, Form 4 or Form 5 and
(2) any  information  statements  on Form 13F  required to be filed with the SEC
pursuant to Section 13(f) of the Act.

All past acts of the attorney-in-fact in furtherance of the foregoing are hereby
ratified and confirmed.

This power of attorney shall be valid from the date hereof until revoked by me.

IN  WITNESS  WHEREOF,  I have  executed  this  instrument  as of the  1st day of
January, 1997.




                                                       /s/ George Soros
                                                       ------------------------
                                                       GEORGE SOROS







                                                             Page 19 of 22 Pages


                                    EXHIBIT B

                                POWER OF ATTORNEY


KNOW ALL MEN BY THESE PRESENTS,  that I, STANLEY F. DRUCKENMILLER,  hereby make,
constitute  and  appoint  each of SEAN C.  WARREN and  MICHAEL  C. NEUS,  acting
individually,  as my agent and  attorney-in-fact for the purpose of executing in
my name,  (a) in my personal  capacity  or (b) in my capacity as Lead  Portfolio
Manager of, member of or in other capacities with Soros Fund Management LLC, all
documents,  certificates,   instruments,   statements,  filings  and  agreements
("documents")  to be  filed  with  or  delivered  to  any  foreign  or  domestic
governmental  or regulatory body or required or requested by any other person or
entity  pursuant  to  any  legal  or  regulatory  requirement  relating  to  the
acquisition,  ownership,  management  or  disposition  of  securities  or  other
investments,  and any other documents relating or ancillary  thereto,  including
but not limited to, all  documents  relating to filings  with the United  States
Securities and Exchange Commission (the "SEC") pursuant to the Securities Act of
1933 or the  Securities  Exchange  Act of 1934  (the  "Act")  and the  rules and
regulations promulgated thereunder, including: (1) all documents relating to the
beneficial ownership of securities required to be filed with the SEC pursuant to
Section 13(d) or Section 16(a) of the Act including, without limitation: (a) any
acquisition  statements  on  Schedule  13D or  Schedule  13G and any  amendments
thereto,  (b) any joint filing agreements  pursuant to Rule 13d-1(f) and (c) any
initial  statements  of, or  statements of changes in,  beneficial  ownership of
securities  on Form 3, Form 4 or Form 5 and (2) any  information  statements  on
Form 13F required to be filed with the SEC pursuant to Section 13(f) of the Act.

All past acts of the attorney-in-fact in furtherance of the foregoing are hereby
ratified and confirmed.

This power of attorney shall be valid from the date hereof until revoked by me.

IN  WITNESS  WHEREOF,  I have  executed  this  instrument  as of the  1st day of
January, 1997.




                                        /s/ Stanley F. Druckenmiller
                                        ---------------------------------------
                                        STANLEY F. DRUCKENMILLER


                                                             Page 20 of 22 Pages


                                    EXHIBIT C

                         QUANTUM INDUSTRIAL PARTNERS LDC
                                POWER OF ATTORNEY

KNOW ALL MEN BY THESE PRESENT,  that the undersigned QUANTUM INDUSTRIAL PARTNERS
LDC (the "Company"), an exempted limited duration company existing and operating
under the laws of the Cayman Islands does, pursuant to a duly adopted resolution
of its Managing Director, hereby designate, constitute and appoint:

                  GARY GLADSTEIN, SEAN WARREN and MICHAEL NEUS

acting,  singly and not  jointly,  as its true and lawful  agent and attorney in
fact for the purpose of  executing  in its name,  all  documents,  certificates,
instruments,  statements,  filings and agreements ("documents") to be filed with
or  delivered  to any foreign or domestic  governmental  or  regulatory  body or
required or  requested  by any other  person or entity  pursuant to any legal or
regulatory  requirement  relating to the acquisition,  ownership,  management or
disposition of securities or other investments, and any other documents relating
or ancillary  thereto,  including but not limited to, all documents  relating to
filings with the United States  Securities and Exchange  Commission  (the "SEC")
pursuant to the Securities  Act of 1933 or the  Securities  Exchange Act of 1934
(the "Act") and the rules and regulations promulgated thereunder, including: (1)
all documents relating to the beneficial  ownership of securities required to be
filed  with  the SEC  pursuant  to  Section  13(d) or  Section  16(a) of the Act
including, without limitation: (a) any acquisition statements on Schedule 13D or
Schedule  13G and  any  amendments  thereto,  (b) any  joint  filing  agreements
pursuant to Rule  13d-1(f) and (c) any initial  statements  of, or statements of
changes in,  beneficial  ownership of securities on Form 3, Form 4 or Form 5 and
(2) any  information  statements  on Form 13F  required to be filed with the SEC
pursuant to Section 13(f) of the Act.

Each  attorney-in-fact  is hereby  authorized and empowered to perform all other
acts and deeds, which he or she in his or her sole discretion deems necessary or
appropriate  to carry out to the fullest  extent the terms and the intent of the
foregoing.  All  prior  acts  of each  attorney-in-fact  in  furtherance  of the
foregoing are hereby ratified and confirmed.

IN WITNESS WHEREOF, the Company has caused this document to be execute this 23rd
day of May, 1996.

                              QUANTUM INDUSTRIAL PARTNERS LDC


                              -------------------------------------------------
                              Curacao Corporation Company N.V.
                              Managing Director









                                                             Page 21 of 22 Pages



                                    EXHIBIT D

                             JOINT FILING AGREEMENT

                  The  undersigned  hereby agree that the  statement on Schedule
13G with  respect to the Common  Stock of Triangle  Pharmaceuticals,  Inc. as of
March 6, 1998 is, and any amendments thereto  (including  amendments on Schedule
13D) signed by each of the  undersigned  shall be, filed on behalf of each of us
pursuant to and in accordance  with the  provisions  of Rule 13d-1(f)  under the
Securities Exchange Act of 1934.

Date:  March 6, 1998                    QUANTUM INDUSTRIAL PARTNERS LDC

                                        By:  /S/ MICHAEL C. NEUS
                                             ----------------------------------
                                             Michael C. Neus
                                             Attorney-in-Fact


Date:  March 6, 1998                    QIH MANAGEMENT INVESTOR, L.P.

                                        By:  QIH Management, Inc.,
                                             its General Partner

                                             By:  /S/ MICHAEL C. NEUS
                                                  -----------------------------
                                                  Michael C. Neus
                                                  Vice President


Date:  March 6, 1998                    QIH MANAGEMENT, INC.

                                        By:  /S/ MICHAEL C. NEUS
                                             ----------------------------------
                                             Michael C. Neus
                                             Vice President



Date:  March 6, 1998                    SOROS FUND MANAGEMENT LLC

                                        By:  /S/ MICHAEL C. NEUS
                                             ----------------------------------
                                             Michael C. Neus
                                             Assistant General Counsel


Date:  March 6, 1998                    GEORGE SOROS

                                        By:  /S/ MICHAEL C. NEUS
                                             ----------------------------------
                                             Michael C. Neus
                                             Attorney-in-Fact


<PAGE>


                                                             Page 22 of 22 Pages


Date:  March 6, 1998                    STANLEY F. DRUCKENMILLER

                                        By:  /S/ MICHAEL C. NEUS
                                             ----------------------------------
                                             Michael C. Neus
                                             Attorney-in-Fact


Date:  March 6, 1998                    DUQUESNE CAPITAL MANAGEMENT, L.L.C.

                                        By:  /S/ GERALD KERNER
                                             ----------------------------------
                                             Gerald Kerner
                                             Managing Director



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