Synonyms: 2-[[(4-methoxyphenyl)methylhydrazono]methyl]-1,3,3-trimethyl-3H-indolium chloride;3H-Indolium, 2-(4-methoxyphenyl)methylhydrazonomethyl-1,3,3-trimethyl-, chloride;1,3,3-Trimethyl-2-[[2-methyl-2-(4-methoxyphenyl)hydrazono]methyl]-3H-indole-1-ium·chloride