5-[[4-Diethyliminio-2,5-cyclohexadien-1-ylidene][4-(diethylamino)phenyl]methyl]-7-sulfonato-2-naphthalenesulfonic acid sodium salt

hydrogen [4-[4-(diethylamino)-alpha-(3,6-disulphonato-1-naphthyl)benzylidene]cyclohexa-2,5-dien-1-ylidene]diethylammonium, sodium salt

Ethanaminium, N-4-4-(diethylamino)phenyl(3,6-disulfo-1-naphthalenyl)methylene-2,5-cyclohexadien-1-ylidene-N-ethyl-, inner salt, sodium salt