1-Methyl-3-(3-(1-methyl-2-phenyl-1H-indol-3-yl)-2-propenylidene)-2-phenyl-3H-indolium bromide 23312-07-4 3H-Indolium, 1-methyl-3-(3-(1-methyl-2-phenyl-1H-indol-3-yl)-2-propenylidene)-2-phenyl-, bromide