Naturally occurring beta-lactams.
D000900:Anti-Bacterial Agents / Q000096:biosynthesis / Q000138:chemical synthesis*; D002511:Cephalosporins / Q000096:biosynthesis / Q000138:chemical synthesis; D019818:Clavulanic Acid; D002969:Clavulanic Acids / Q000096:biosynthesis / Q000138:chemical synthesis*; D007769:Lactams; D010406:Penicillins / Q000096:biosynthesis / Q000138:chemical synthesis; D013845:Thienamycins / Q000096:biosynthesis / Q000138:chemical synthesis; D047090:beta-Lactams
D000900:Anti-Bacterial Agents; D002511:Cephalosporins; D002969:Clavulanic Acids; D007769:Lactams; D010406:Penicillins; D013845:Thienamycins; D047090:beta-Lactams; D019818:Clavulanic Acid; C020786:olivanic acid; C027318:nocardicin; C015537:thienamycin