1-(2-((4-((2-Cyano-4-nitrophenyl)azo)phenyl)ethylamino)ethyl)pyridinium acetate 72829-23-3 EINECS 276-909-3 Pyridinium, 1-(2-((4-((2-cyano-4-nitrophenyl)azo)phenyl)ethylamino)ethyl)-, acetate Pyridinium, 1-(2-((4-((4-nitro-2-cyanophenyl)azo)phenyl)ethylamino)ethyl)-, acetate