title: Preparation of 7-aminocephalosporanic acid and 6-aminopenicillanic acid.
mesh_terms: D002511:Cephalosporins; D002512:Cephalothin / Q000138:chemical synthesis*; D055598:Chemical Phenomena; D002621:Chemistry; D010397:Penicillanic Acid / Q000138:chemical synthesis; D010406:Penicillins / Q000138:chemical synthesis*; D013844:Thiazoles / Q000138:chemical synthesis*
chemical_list: D002511:Cephalosporins; D010406:Penicillins; D013844:Thiazoles; D010397:Penicillanic Acid; D002512:Cephalothin