0000899140-04-000547 Sample Contracts

BY AND BETWEEN

Securities Purchase Agreement • April 21st, 2004 • Warburg Pincus Private Equity Viii L P • Pharmaceutical preparations • New York

• Contract Type
  Securities Purchase Agreement
• Filed
  April 21st, 2004
• Company
  Warburg Pincus Private Equity Viii L P
• Industry
  Pharmaceutical preparations
• Jurisdiction
  New York

Joint Filing Agreement

Joint Filing Agreement • April 21st, 2004 • Warburg Pincus Private Equity Viii L P • Pharmaceutical preparations

• Contract Type
  Joint Filing Agreement
• Filed
  April 21st, 2004
• Company
  Warburg Pincus Private Equity Viii L P
• Industry
  Pharmaceutical preparations

The undersigned hereby agree that the statement on Schedule 13D filed by the undersigned with respect to the Common Stock of Neurogen Corporation 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.