Synonyms: 5-Thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylicacid, 7-[2-amino-2-(1,4-cyclohexadien-1-yl)acetamido]-3-methyl-8-oxo-, hydrate,D- (8CI); 5-Thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylic acid,7-[[(2R)-amino-1,4-cyclohexadien-1-ylacetyl]amino]-3-methyl-8-oxo-, dihydrate,(6R,7R)- (9CI); Cefradin hydrate; Cefradine dihydrate; Cephradine dihydrate;Cephradine hydrate; Sefril hydrate; Velosef hydrate