Synonyms: 5-Thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylicacid, 7-(2-amino-2-phenylacetamido)-3-methyl-8-oxo-, monohydrate, D- (8CI);5-Thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylic acid,7-[(aminophenylacetyl)amino]-3-methyl-8-oxo-, monohydrate, [6R-[6a,7b(R*)]]-;5-Thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylicacid, 7-[[(2R)-aminophenylacetyl]amino]-3-methyl-8-oxo-, monohydrate, (6R,7R)-(9CI);Cephalexin monohydrate;