Synonyms: 1-[2-[[4-[[2,5-dichloro-4-[(dimethylamino)sulphonyl]phenyl]azo]phenyl]ethylamino]ethyl]pyridinium acetate;1-[2-[[4-[4-[2,5-Dichloro-4-(dimethylsulfamoyl)phenyl]azo] phenyl]ethylamino]ethyl]pyridinium acetate;Pyridinium, 1-[2-[[4-[[2,5-dichloro-4-[(dimethylamino)sulfonyl]phenyl]azo]phenyl] ethylamino]ethyl]-, acetate;Pyridinium,1-[2-[[4-[[2,5-dichloro-4-[(dimethylamino)sulfonyl]phenyl]azo]phenyl] ethylamino]ethyl]-,acetate