86669-21-8 Methanaminium, N,N'-((1,2-bis(4-(dimethylamino)phenyl)-1,2-ethanediylidene)di-2,5-cyclohexadiene-4,1-diylidene)bis(N-methyl-, dichloride TKDPE Tetrakis(4-(dimethylamino)phenyl)ethylene