7[(2-Hydroxyamino-2-disubstituted phenyl-acetamido)-]3-heterocyc
7[(2-Thiazolyl)-2-(oxoimino)acetamido]cephalosporin derivatives
7[(Carboxyoxiran-3-carboxamido)phenylacetamido]cephalosporin der
7[(Furanyl-2-acetamido)-2-acetamido]cephalosporin derivatives
7[2(2,3 Dioxopiperazin-1-yl-carbonylamino)substituted 2 phenylac
7[2(Substituted phenyl)2-(amino)acetamido]cephalosporin derivati
7[2-Hydroxyiminoacetamido]cephalosporins
7[3,6-Dihydro-1(2H)-p yridyl]-2-oxo-2H-[1,2,4]oxadiazolo[2,3-c]p