title: Recent developments in the chemistry of penicillins.
mesh_terms: D000215:Acylation; D000478:Alkylation; D002264:Carboxylic Acids; D055598:Chemical Phenomena; D002621:Chemistry; D003499:Cyclic S-Oxides; D006868:Hydrolysis; D007536:Isomerism; D007769:Lactams; D010397:Penicillanic Acid / Q000031:analogs & derivatives; D010406:Penicillins / Q000031:analogs & derivatives; D009626:Terminology as Topic; D013844:Thiazoles
chemical_list: D002264:Carboxylic Acids; D003499:Cyclic S-Oxides; D007769:Lactams; D010406:Penicillins; D013844:Thiazoles; D010397:Penicillanic Acid