Synonyms: 5-Thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylicacid, 3-(hydroxymethyl)-8-oxo-7-[2-(1H-tetrazol-1-yl)acetamido]-, acetate(ester) (8CI); 5-Thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylic acid,3-[(acetyloxy)methyl]-8-oxo-7-[(1H-tetrazol-1-ylacetyl)amino]-, (6R,7R)- (9CI);5-Thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylic acid,3-[(acetyloxy)methyl]-8-oxo-7-[(1H-tetrazol-1-ylacetyl)amino]-, (6R-trans)-;7-(1H-Tetrazol-1-acetamido)cephalosporanic acid;7-(1H-Tetrazol-1-yl)acetamidocelphalosporanic acid;N-(Tetrazolylacetyl)-7-aminocephalosporin