title: [Studies on beta-lactam antibiotics for medicinal purpose. XIII. Synthesis and structure-activity relationships of 7 beta-[alpha-(4-alkyl-2,3-dioxo-1-piperazinecarboxamido)-alpha-substituted acetamido]-7 alpha-methoxycephalosporanic acids].
mesh_terms: D000818:Animals; D001419:Bacteria / Q000187:drug effects*; D002511:Cephalosporins / Q000138:chemical synthesis / Q000494:pharmacology*; D004285:Dogs; D004352:Drug Resistance, Microbial; D051379:Mice; D011817:Rabbits; D051381:Rats; D013329:Structure-Activity Relationship
chemical_list: D002511:Cephalosporins