5-cyclohexadien-1-ylidene]-n-methyl-)amino]-5-sulfophenyl]methylene]-hydrox

methanaminium,n-[4-[[4-(dimethylamino)phenyl][2-ethoxy-4-[(4-methylsulfophenyl

sodium 5-[[4-(dimethylamino)phenyl]-(4-dimethyliminiocyclohexa-2,5-dien-1-ylidene)methyl]-4-ethoxy-2-(4-methyl-2-sulfonato-anilino)benzenesulfonate

sodium 5-[[4-(dimethylamino)phenyl]-(4-dimethylazaniumylidenecyclohexa-2,5-dien-1-ylidene)methyl]-4-ethoxy-2-(4-methyl-2-sulfonatoanilino)benzenesulfonate