2-[2-(9-Ethyl-9H-dibenzo(b,d)pyrrol-3-yl)ethenyl]-1,3,3-trimethyl-3H-indolium chloride

3-[(1,3-dihydro-1,3,3-trimethyl-2h-indol-2-ylidene)ethylidene]-9-ethyl-3h-carbazoliu chloride

3-[(1,3-dihydro-1,3,3-trimethyl-2H-indol-2-ylidene)ethylidene]-9-ethyl-3H-carbazolium chloride