(6R,7R)-3-(acetoxymethyl)-7-(2-cyanoacetamido)-8-oxo-5-thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylic acid; (6R,7R)-3-[(Acetyloxy)methyl]-7-[(2-cyanoacetyl)amino]-8-oxo-5-Thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylic Acid; 7-(2-Cyanoacetamido)-3-(hydroxymethyl)-8-oxo-5-thia--1-azabicyclo[4.2.0]oct-2-ene-2-carboxylic Acid Acetate (Ester); 7-Cyanoacetamidocephalosporanic Acid; Cephacetril; Cephacetrile