title: Studies related to penicillins. VII. The structure of the epimers derived from 6 -substituted penicillanic acids.
mesh_terms: D055598:Chemical Phenomena; D002621:Chemistry; D008745:Methylation; D009570:Nitriles; D010397:Penicillanic Acid; D010406:Penicillins; D013237:Stereoisomerism; D013844:Thiazoles
chemical_list: D009570:Nitriles; D010406:Penicillins; D013844:Thiazoles; D010397:Penicillanic Acid