Synonyms: 5-Thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylicacid, 3-[(acetyloxy)methyl]-7-[(cyanoacetyl)amino]-8-oxo-, (6R,7R)- (9CI);5-Thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylic acid,3-[(acetyloxy)methyl]-7-[(cyanoacetyl)amino]-8-oxo-, (6R-trans)-;5-Thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylic acid,7-(2-cyanoacetamido)-3-(hydroxymethyl)-8-oxo-, acetate (7CI);5-Thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylic acid,7-(2-cyanoacetamido)-3-(hydroxymethyl)-8-oxo-, acetate (ester) (8CI);7-Cyanoacetamidocephalosporanic acid; Cefacetrile; Cephacetril; Cephacetrile