[4-[[4-[bis[(3-sulphophenyl)methyl]amino]phenyl][4-(dimethylamino)phenyl]methylene]-2,5-cyclohexadien-1-ylidene]dimethylammonium

N-[4-[[4-[[(3-Sulfophenyl)methyl][(3-sulfonatophenyl)methyl]amino]phenyl][4-(dimethylamino)phenyl]methylene]-2,5-cyclohexadien-1-ylidene]-N-methylmethanaminium