title: 6-ALKYL PENICILLINS AND 7 ALKYL CEPHALOSPORINS.
mesh_terms: D000478:Alkylation; D002511:Cephalosporins / Q000138:chemical synthesis*; D008722:Methods; D010406:Penicillins / Q000138:chemical synthesis*
chemical_list: D002511:Cephalosporins; D010406:Penicillins