0000950149-03-001161 Sample Contracts

EXHIBIT E

Voting Agreement • May 14th, 2003 • MPM Bio Ventures Iii Lp • Pharmaceutical preparations • Delaware

• Contract Type
  Voting Agreement
• Filed
  May 14th, 2003
• Company
  MPM Bio Ventures Iii Lp
• Industry
  Pharmaceutical preparations
• Jurisdiction
  Delaware

EXHIBIT B

Warrant Purchase Agreement • May 14th, 2003 • MPM Bio Ventures Iii Lp • Pharmaceutical preparations • California

• Contract Type
  Warrant Purchase Agreement
• Filed
  May 14th, 2003
• Company
  MPM Bio Ventures Iii Lp
• Industry
  Pharmaceutical preparations
• Jurisdiction
  California

EXHIBIT D

Rights Agreement • May 14th, 2003 • MPM Bio Ventures Iii Lp • Pharmaceutical preparations • California

• Contract Type
  Rights Agreement
• Filed
  May 14th, 2003
• Company
  MPM Bio Ventures Iii Lp
• Industry
  Pharmaceutical preparations
• Jurisdiction
  California

EXHIBIT A

MPM Bio Ventures Iii Lp • May 14th, 2003 • Pharmaceutical preparations

• Company
  MPM Bio Ventures Iii Lp
• Filed
  May 14th, 2003
• Industry
  Pharmaceutical preparations

Pursuant to Rule 13d-1(k)(1) under the Securities Exchange Act of 1934, the undersigned hereby agree that only one statement containing the information required by Schedule 13D need be filed with respect to the ownership by each of the undersigned of shares of stock of Rigel Pharmaceuticals, Inc.