Synonyms: 5-Thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylicacid, 3-[(acetyloxy)methyl]-7-amino-8-oxo-, (6R-trans)-;5-Thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylic acid,7-amino-3-(hydroxymethyl)-8-oxo-, acetate (ester) (8CI);(7R)-7-Aminocephalosporanic acid;3-(Acetoxymethyl)-7-aminocephem-4-carboxylicacid;3-Acetoxymethyl-7-aminoceph-3-em-4-carboxylic acid;3-Acetoxymethyl-7b-aminoceph-3-em-4-carboxylicacid;7-ACA;7-ACS;7-Amino-3-acetoxymethyl-3-cephem-4-carboxylic acid;7-Amino-3-acetoxymethyl-D3-cephem-4-carboxylic acid;5-Thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylicacid, 3-[(acetyloxy)methyl]-7-amino-8-oxo-, (6R,7R)-;7b-Amino-3-acetoxymethylcephemcarboxylicacid;7b-Aminocephalosporanic acid;