((4-Chloro-2,5-dimethoxyphenyl)hydrazono)propanedinitrile 64692-05-3 BRN 0669565 Mesoxalonitrile, (4-chloro-2,5-dimethoxyphenyl)hydrazone Propanedinitrile, ((4-chloro-2,5-dimethoxyphenyl)hydrazono)-