2-(2-(4-(Diethylammonio)phenyl)vinyl)-1,3,3-trimethyl-3H-indolium oxalate 3H-Indolium, 2-(2-(4-(diethylamino)phenyl)ethenyl)-1,3,3-trimethyl-, ethanedioate (1:1) 83969-11-3 EINECS 281-588-8