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
Exhibit 4.2 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
1 EXHIBIT 4.1 PHARMCHEM, INC. UNSECURED SUBORDINATED NOTE AND WARRANT PURCHASE AGREEMENT THIS UNSECURED SUBORDINATED NOTE AND WARRANT PURCHASE AGREEMENT (this "AGREEMENT") is made as of September 12, 2001 by and between PharmChem, Inc., a Delaware...Unsecured Subordinated Note and Warrant Purchase Agreement • September 27th, 2001 • Pharmchem Inc • Services-medical laboratories • Delaware