title: Naturally-occurring beta-lactamase inhibitors with antibacterial activity.
mesh_terms: D000581:Amidohydrolases / Q000037:antagonists & inhibitors*; D000900:Anti-Bacterial Agents / Q000302:isolation & purification / Q000494:pharmacology*; D001419:Bacteria / Q000187:drug effects*; D004755:Enterobacteriaceae / Q000187:drug effects; D013302:Streptomyces / Q000378:metabolism; D065093:beta-Lactamase Inhibitors; D047090:beta-Lactams / Q000302:isolation & purification / Q000494:pharmacology*
chemical_list: D000900:Anti-Bacterial Agents; D065093:beta-Lactamase Inhibitors; D047090:beta-Lactams; D000581:Amidohydrolases