英文别名(4-nitrophenyl)methyl (6R,7R)-7-amino-3-chloro-8-oxo-5-thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylate hydrochloride; p-nitrobenzyl (6R-trans)-7-amino-3-chloro-8-oxo-5-thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylate monohydrochloride; Cefaclor Impurity 57; Cefixime Impurity; Cefaclor Impurities 11 
