Synonyms: 5-Thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylicacid, 3-(hydroxymethyl)-8-oxo-7-[(2-thienylacetyl)amino]-, (6R,7R)- (9CI);5-Thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylic acid,3-(hydroxymethyl)-8-oxo-7-[(2-thienylacetyl)amino]-, (6R-trans)-;5-Thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylic acid,3-(hydroxymethyl)-8-oxo-7-[2-(2-thienyl)acetamido]- (7CI,8CI);(6R,7R)-3-Hydroxymethyl-7-(thien-2-ylacetamido)ceph-3-em-4-carboxylic acid;3-Hydroxymethyl-7-(2-thienylacetamide)-3-cephem-4-carboxylic acid;Deacetylcephalothin; Deacetylcephalotin; Desacetylcephalothin