title: Comparative in vitro activity of Bay k 4999 and piperacillin.
mesh_terms: D001390:Azlocillin / Q000031:analogs & derivatives; D001419:Bacteria / Q000187:drug effects*; D048289:Imidazolidines; D008826:Microbial Sensitivity Tests; D010403:Penicillin Resistance; D010406:Penicillins / Q000494:pharmacology*
chemical_list: D048289:Imidazolidines; D010406:Penicillins; D001390:Azlocillin; C017976:furazlocillin