Synonyms: 5-Thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylicacid, 3-[(acetyloxy)methyl]-7-[(cyanoacetyl)amino]-8-oxo-, monosodium salt,(6R,7R)- (9CI); 5-Thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylic acid,3-[(acetyloxy)methyl]-7-[(cyanoacetyl)amino]-8-oxo-, monosodium salt, (6R-trans)-;5-Thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylic acid,7-(2-cyanoacetamido)-3-(hydroxymethyl)-8-oxo-, acetate (ester), monosodium salt(8CI); 7-Cyanoacetylaminocephalosporanic acid sodium salt; Ba 36278; CIBA36278Ba; Cefacetrile sodium; Celospor; Celtol; Cephacetrile sodium;Cephacetrile-Na; Sodium3-(acetoxymethyl)-7-(2-cyanoacetamido)-8-oxo-5-thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylate;Sodium 7-(2-cyanoacetamido)cephalosporanic acid; Sodium7-cyanacetamidocephalosporanate; Sodium cefacetril; Sodium cefacetrile; Sodiumcephacetrile; Vetimast