Synonyms: Xanthylium, 9-(2-carboxyphenyl)-3,6-bis(diethylamino)-, (T-4)-hydroxy(2-(hydroxy-kappaO)-5-nitro-3-(2-(2-(oxo-kappaO)-1-((phenylamino)carbonyl)propyl)diazenyl-kappaN1)benzenesulfonato(3-))chromate(1-) (1:1);9-(2-Carboxyphenyl)-3,6-bis(diethylamino)xanthylium ((3-(1-(anilinocarbonyl)-2-oxopropyl)azo)-2-hydroxy-5-nitrobenzenesulphonato(3-))hydroxychromate(1-);Xanthylium, 9-(2-carboxyphenyl)-3,6-bis(diethylamino)-, (T-4)-hydroxy(2-(hydroxy-kappaO)-5-nitro-3-((2-(oxo-kappaO)-1-((phenylamino)carbonyl)propyl)azo-kappaN1)benzenesulfonato(3-))chromate(1-);Xanthylium, 9-(2-carboxyphenyl)-3,6-bis(diethylamino)-, hydroxy(2-hydroxy-5-nitro-3-((2-oxo-1-((phenylamino)carbonyl)propyl)azo)benzenesulfonato(3-))chromate(1-);N-[9-(2-carboxyphenyl)-6-(diethylamino)-3H-xanthen-3-ylidene]-N-ethylethanaminium chromium(3+) hydroxide (1Z,2Z)-2-[2-(5-nitro-2-oxido-3-sulfonatophenyl)hydrazinylidene]-3-oxo-N-phenylbutanimidate (1:1:1:1)