1,3,3-trimethyl-2-[(E)-2-(2-methyl-1H-indol-3-yl)ethenyl]indol-1-ium sulfate, 1,3,3-Trimethyl-2-(2-(2-methyl-1H-indol-3-yl)ethenyl)-3H-indolium sulfate (2:1), 3H-Indolium,1,3,3-trimethyl-2-(2-(2-methyl-1H-indol-3-yl)ethenyl)-,sulfate (2:1), 1,3,3-Trimethyl-2-(2-(2-methyl-1H-indol-3-yl)vinyl)-3H-indolium sulphate (2:1), EINECS 255-197-8,