title: Chemistry of cephalosporin antibiotics. XXIV. 3-Halo- and 3-methoxy-3-cephems.
mesh_terms: D002511:Cephalosporins / Q000138:chemical synthesis* / Q000494:pharmacology; D004754:Enterobacter / Q000187:drug effects; D004926:Escherichia coli / Q000187:drug effects; D007711:Klebsiella pneumoniae / Q000187:drug effects; D008826:Microbial Sensitivity Tests; D010403:Penicillin Resistance; D012475:Salmonella / Q000187:drug effects; D012760:Shigella / Q000187:drug effects; D013210:Staphylococcus / Q000187:drug effects; D013329:Structure-Activity Relationship
chemical_list: D002511:Cephalosporins