7-.beta.-[D-2-Amino-2-(1,4-cyclo hexadienyl)-acetylamino]-3-Hal-

7-Acetylspirobenzofuranone compound

7-Acyl-3-(carboxyalkyl and carbamoylalkyl substituted oxadiazoly

7-Acyl-3-(carboxyalkyl and carbamoylalkyl substituted oxadiazoly

7-acyl-3-(substituted carbamoyloxy) cephem compounds and process

7-Acyl-3-(sulfaminoalkyl substituted tetrazolylthiomethyl)cephal

7-Acyl-3-(sulfoalkyl substituted oxadiazolylthiomethyl) cephalos

7-Acyl-3-(sulfoalkyl substituted oxadiazolylthiomethyl) cephalos

7-Acyl-3-(sulfonic acid and sulfamoyl substituted tetrazolyl thi

7-Acyl-3-(sulfonic acid and sulfamoyl substituted tetrazolyl thi

7-Acyl-3-(sulfonic acid and sulfamoyl substituted tetrazolyl thi

7-Acyl-3-(ureidoalkyl substituted tetrazolylthiomethyl) cephalos

7-Acyl-3-(ureidoalkyl substituted tetrazolylthiomethyl)-cephalos

7-Acyl-3-(ureidoalkyl substituted tetrazolylthiomethyl)cephalosp

7-Acylamine-3-(sulfoalkyl substituted oxadiazolylthiomethyl) cep

7-Acylamino-3-(5-sulfomethyl-1,3,4-thiadiazol-2-y lthiomethyl)-3

7-Acylamino-3-(substituted tetrazolyl thiomethyl) cephalosporins

7-Acylamino-3-(sulfaminoalkyl substituted tetrazolylthiomethyl)c

7-Acylamino-3-(sulfaminoalkyl substituted tetrazolylthiomethyl)c

7-Acylamino-3-cephem-4-carboxylic acid derivatives and pharmaceu