title: Natural beta-lactam antibiotics.
mesh_terms: D000900:Anti-Bacterial Agents / Q000096:biosynthesis* / Q000302:isolation & purification / Q000494:pharmacology; D002511:Cephalosporins / Q000096:biosynthesis / Q000302:isolation & purification / Q000494:pharmacology; D002513:Cephamycins / Q000096:biosynthesis / Q000302:isolation & purification / Q000494:pharmacology; D055598:Chemical Phenomena; D002621:Chemistry; D019818:Clavulanic Acid; D007769:Lactams; D010406:Penicillins / Q000096:biosynthesis / Q000266:history / Q000302:isolation & purification / Q000494:pharmacology; D013845:Thienamycins; D065093:beta-Lactamase Inhibitors; D047090:beta-Lactams / Q000096:biosynthesis* / Q000302:isolation & purification / Q000494:pharmacology
chemical_list: D000900:Anti-Bacterial Agents; D002511:Cephalosporins; D002513:Cephamycins; D007769:Lactams; D010406:Penicillins; D013845:Thienamycins; D065093:beta-Lactamase Inhibitors; D047090:beta-Lactams; D019818:Clavulanic Acid; C027318:nocardicin; C015537:thienamycin