((2-Bromo-6-chloro-4-nitrophenyl)hydrazono)propanedinitrile 64692-06-4 BRN 1825031 Mesoxalonitrile, (2-bromo-6-chloro-4-nitrophenyl)hydrazone Propanedinitrile, ((2-bromo-6-chloro-4-nitrophenyl)hydrazono)-