Synonyms: 1-[2-[[4-[(2-cyano-4-nitrophenyl)azo]phenyl]ethylamino]ethyl]pyridinium acetate;1-[2-[[4-[(2-cyano-4-nitrophenyl)azo]phenyl]ethylamino]ethyl]-pyridiniu ace;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;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