Also Called: 1H-Indolium, 1-[(1,3-dihydro-1,3,3-trimethyl- 2H-indol-2-ylidene)ethylidene]-2,3-dihydro -2-methyl-, chloride;1H-Indolium, 1-[2-(1,3-dihydro-1,3,3-trimethyl-2H-indol-2-ylidene)ethylidene]-2,3-dihydro-2-methyl-, chloride (1:1);1H-Indolium, 1-[(1,3-dihydro-1,3,3-trimethyl-2H-indol-2-ylidene)ethylidene]-2,3-dihydro-2-methyl-, chloride