59062-14-5 ACETIC ACID, ((3-CHLORO-4-NITROPHENYL)HYDRAZONO)CYANO-, BUTYL ESTER Cyanoglyoxylic acid butyl ester 2-(3-chloro-4-nitrophenyl)hydrazone Glyoxylic acid, cyano-, butyl ester, 2-(3-chloro-4-nitrophenyl)hydrazone