59062-25-8 ACETIC ACID, CYANO((4-NITROPHENYL)HYDRAZONO)-, 3-METHYLBUTYL ESTER Cyanoglyoxylic acid isopentyl ester 2-(p-nitrophenyl)hydrazone Glyoxylic acid, cyano-, isopentyl ester, 2-(p-nitrophenyl)hydrazone