Synonyms: 5-Thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylicacid, 3-[(acetyloxy)methyl]-7-[(bromoacetyl)amino]-8-oxo-, (6R,7R)- (9CI);5-Thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylic acid,3-[(acetyloxy)methyl]-7-[(bromoacetyl)amino]-8-oxo-, (6R-trans)-;5-Thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylic acid,7-(2-bromoacetamido)-3-(hydroxymethyl)-8-oxo-, acetate (ester) (8CI);7-(2-Bromoacetamido)cephalosporanic acid; 7-Bromoacetylaminocephalosporanicacid