Synonyms: 5-Thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylicacid,3-methyl-8-oxo-7-[[[4-(1,4,5,6-tetrahydro-2-pyrimidinyl)phenyl]acetyl]amino]-,(6R,7R)- (9CI); 5-Thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylic acid,3-methyl-8-oxo-7-[[[4-(1,4,5,6-tetrahydro-2-pyrimidinyl)phenyl]acetyl]amino]-,(6R-trans)-; Cefrotil; HR 580