title: Synthetic penicillins derived from benznorcaradienecarboxylic acids.
mesh_terms: D000143:Acids; D000818:Animals; D055598:Chemical Phenomena; D002621:Chemistry; D051379:Mice; D010068:Oxacillin / Q000494:pharmacology; D010403:Penicillin Resistance; D010406:Penicillins / Q000032:analysis / Q000138:chemical synthesis* / Q000494:pharmacology; D013210:Staphylococcus / Q000187:drug effects; D013297:Streptococcus pyogenes / Q000187:drug effects
chemical_list: D000143:Acids; D010406:Penicillins; D010068:Oxacillin