title: Chemistry of cephalosporin antibiotics. XXI. Conversion of penicillins to cephalexin.
mesh_terms: D002511:Cephalosporins / Q000138:chemical synthesis*; D010400:Penicillin G; D010404:Penicillin V; D010406:Penicillins
chemical_list: D002511:Cephalosporins; D010406:Penicillins; D010400:Penicillin G; D010404:Penicillin V