title: Chemical relationships between cephalosporins and penicillins.
mesh_terms: D000215:Acylation; D002511:Cephalosporins; D055598:Chemical Phenomena; D002621:Chemistry; D003500:Cyclization; D003903:Deuterium; D004952:Esters; D007769:Lactams; D010084:Oxidation-Reduction; D010406:Penicillins; D013237:Stereoisomerism
chemical_list: D002511:Cephalosporins; D004952:Esters; D007769:Lactams; D010406:Penicillins; D003903:Deuterium