Exhibit 1
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Joint Filing Agreement
The undersigned hereby agree that the statement on Schedule 13D filed by
the undersigned with respect to the Common Stock of Triangle Pharmaceuticals,
Inc. is, and any amendment thereto signed by each of the undersigned shall be,
filed on behalf of each undersigned pursuant to and in accordance with the
provisions of Rule 13d-1(k) under the Securities Exchange Act of 1934, as
amended.
Dated: September 4, 2001 WARBURG PINCUS PRIVATE EQUITY VIII, L.P.
By: Warburg, Xxxxxx & Co.,
General Partner
By: /s/ Xxxxx Xxxxxxx
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Name: Xxxxx Xxxxxxx
Title: Attorney in Fact
Dated: September 4, 2001 WARBURG, XXXXXX & CO.
By: /s/ Xxxxx Xxxxxxx
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Name: Xxxxx Xxxxxxx
Title: Attorney in Fact
Dated: September 4, 2001 WARBURG PINCUS LLC
By: /s/ Xxxxx Xxxxxxx
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Name: Xxxxx Xxxxxxx
Title: Vice President
