3-((1-(2,5-Dioxopyrrolidin-1-yl)ethyl)(3-methyl-4-((4-nitrophenyl)azo)phenyl)amino)propiononitrile 63467-16-3 EINECS 264-228-4 Propanenitrile, 3-((1-(2,5-dioxo-1-pyrrolidinyl)ethyl)(3-methyl-4-((4-nitrophenyl)azo)phenyl)amino)-