definiens: ) by and among AVEOPharmaceuticals, Inc., a Delaware corporation ( the ), and the Purchasers ( as defined in the Purchase Agreement),dated as of March, 2009, acknowledges having read the representations in the Purchase Agreement section entitled and hereby represents that the statements contained therein are true and correct withrespect to the undersigned as a Purchaser . The undersigned further hereby agrees to be bound by the terms and conditions of(i ) the Purchase Agreement as a thereunder, ( ii ) the Stockholders ’ Voting Agreement ( as defined in the PurchaseAgreement ) as a thereunder, ( iii ) the Investor Rights Agreement ( as defined in the Purchase Agreement ) as a thereunder and ( iv ) the Co - Sale Agreement ( as defined in the Purchase Agreement ) as a thereunder, and authorizes this signature page to be attached to the Purchase Agreement, the Stockholders ’ Voting Agreement, theInvestor Rights Agreement and the Co - Sale Agreement, or counterparts thereof