(4-((4-(Dimethylamino)phenyl)(4-methoxy-3-sulphonatophenyl)methylene)cyclohexa-2,5-dien-1-ylidene)dimethylammonium 63148-81-2 EINECS 263-932-9 Methanaminium, N-(4-((4-(dimethylamino)phenyl)(4-methoxy-3-sulfophenyl)methylene)-2,5-cyclohexadien-1-ylidene)-N-methyl-, inner salt