6-APA and the development of the beta-lactam antibiotics.
D000900:Anti-Bacterial Agents / Q000138:chemical synthesis / Q000266:history*; D002511:Cephalosporins / Q000138:chemical synthesis / Q000266:history; D002621:Chemistry; D004355:Drug Stability; D049673:History, 20th Century; D010397:Penicillanic Acid / Q000266:history*; D010403:Penicillin Resistance; D010406:Penicillins / Q000138:chemical synthesis / Q000266:history; D001618:beta-Lactamases / Q000378:metabolism; D047090:beta-Lactams / Q000138:chemical synthesis / Q000266:history
D000900:Anti-Bacterial Agents; D002511:Cephalosporins; D010406:Penicillins; D047090:beta-Lactams; D010397:Penicillanic Acid; D001618:beta-Lactamases