title: The comparative in vitro activity and beta-lactamase stability of a new ureido penicillin.
mesh_terms: D001419:Bacteria / Q000187:drug effects; D004355:Drug Stability; D004357:Drug Synergism; D008826:Microbial Sensitivity Tests; D010405:Penicillinase / Q000378:metabolism*; D010406:Penicillins / Q000378:metabolism / Q000494:pharmacology*; D001618:beta-Lactamases / Q000378:metabolism*
chemical_list: D010406:Penicillins; D010405:Penicillinase; D001618:beta-Lactamases