Exhibit 99.1
JOINT FILING AGREEMENT
Pursuant to Rule 13d-1(k) promulgated under the Securities Exchange Act of
1934, as amended, the undersigned hereby agree to the joint filing of this
Statement on Schedule 13D including any amendments thereto. This Joint Filing
Agreement may be executed in any number of counterparts, each of which shall be
deemed an original, but all of which shall constitute one and the same
instrument.
Date: November 5, 2001
PROSPECT MANAGEMENT CO., L.L.C.
*
------------------------------------------
PROSPECT MANAGEMENT CO. II, L.L.C.
*
------------------------------------------
BY:
TITLE:
PROSPECT VENTURE PARTNERS, L.P.
*
------------------------------------------
PROSPECT VENTURE PARTNERS II, L.P.
*
------------------------------------------
*
------------------------------------------
NAME: XXXXX XXXXXXX
*
------------------------------------------
NAME: XXXXXXXXX X. XXXXXX
*
------------------------------------------
NAME: XXXXXXX X. XXXXXX
*
------------------------------------------
NAME: XXXXX X. XXXXXXXXX
* BY: /s/ Chen Tang
------------------------------------------
CHEN TANG, ATTORNEY-IN-FACT
