ethyl N-(4-chlorophenyl)-2-oxoglycinate [(4-Chlorophenyl)amino]oxoacetic acid ethyl ester 2-(4-Chlorophenylamino)glyoxylic acid ethyl ester N-(4-Chlorophenyl)oxamidic acid ethyl ester ethyl 2-(4-chlorophenylaMino)-2-oxoacetate Acetic acid, 2-[(4-chlorophenyl)amino]-2-oxo-, ethyl ester