title: The evolution of the broad-spectrum penicillins.
mesh_terms: D000667:Ampicillin / Q000031:analogs & derivatives / Q000138:chemical synthesis; D002228:Carbenicillin / Q000138:chemical synthesis; D049673:History, 20th Century; D007769:Lactams / Q000138:chemical synthesis; D010397:Penicillanic Acid / Q000138:chemical synthesis / Q000031:analogs & derivatives; D010406:Penicillins / Q000266:history*; D011549:Pseudomonas / Q000187:drug effects; D013845:Thienamycins
chemical_list: D007769:Lactams; D010406:Penicillins; D013845:Thienamycins; D000667:Ampicillin; D010397:Penicillanic Acid; D002228:Carbenicillin; C004408:aminopenicillanic acid; C015537:thienamycin