59062-21-4 ACETIC ACID, CYANO((4-NITROPHENYL)HYDRAZONO)-, 2-METHYLPROPYL ESTER Cyanoglyoxylic acid isobutyl ester 2-(p-nitrophenyl)hydrazone Glyoxylic acid, cyano-, isobutyl ester, 2-(p-nitrophenyl)hydrazone