Exhibit 4.3 PHARMCHEM, INC. UNSECURED SUBORDINATED NOTE AND WARRANT PURCHASE AGREEMENT THIS UNSECURED SUBORDINATED NOTE AND WARRANT PURCHASE AGREEMENT (this "AGREEMENT") is made as of September 19, 2001 by and between PharmChem, Inc., a Delaware...Unsecured Subordinated Note and Warrant Purchase Agreement • September 27th, 2001 • Pharmchem Inc • Services-medical laboratories • Delaware
Contract Type FiledSeptember 27th, 2001 Company Industry Jurisdiction