title: Structure-activity relationships of semisynthetic penicillins.
mesh_terms: D055598:Chemical Phenomena; D002621:Chemistry; D006967:Hypersensitivity / Q000209:etiology; D010403:Penicillin Resistance; D010405:Penicillinase; D010406:Penicillins / Q000138:chemical synthesis / Q000302:isolation & purification / Q000378:metabolism / Q000494:pharmacology; D011485:Protein Binding; D013210:Staphylococcus / Q000187:drug effects
chemical_list: D010406:Penicillins; D010405:Penicillinase