3,7-Disubstituted cephalosporins

3,7-Disubstituted-2 or 3-cephem-4-carboxylic acid compounds

3-(1-Halo-2-oxoethyl)cephalosporin intermediates

3-(4-amidopyrrol-2-ylmethlidene)-2-indolinone derivatives as...

3-(Carbamoyl)pyridino derivatives of 7a-methoxy ureidocephalospo

3-(Disubstituted)aminoisothiazolo[3,4-d]pyrimidines

3-6 Bis(morpholinoalkylthio)-pyridazines

3-Acetoxymethyl cephalosporins having at position-7 a carboxy su

3-Acetyltetrahydro-2-(nitromethylene)-2H-1,3-thiazine

3-Carbamoyl substituted-7-ureido substituted cephalosporins

3-Carbamoyloxymethyl or N-methyl-carbamoyloxymethyl-7-[2-carboxy

3-Cephem intermediates

3-Formylmethyl-cephalosporins

3-Heterocyclic substituted cephem compounds

3-Heterocyclicthio-7-.alpha.-carboxy 2-aryl acetamido cephalospo

3-Heterothio substituted 7-(ureido-heteroacetyl) cephalosporins

3-Heterothio-7-ureido cephalosporins

3-HETEROTHIOMETHYL UREIDO CEPHALOSPORINS

3-Indolyl-3-bis-amino-phenyl-phthalide compounds

3-Oxopyridazinylthiomethyl derivatives of ureidocephalosporins