Synonyms: 3H-INDOLIUM, 2-[5-(1,3-DIHYDRO-3,3-DIMETHYL-1-PHENYL-2H-INDOL-2-YLIDENE)-1,3-PENTADIENYL]-3,3-DIMETHYL-1-PHENYL-, PERCHLORATE;2-[(1E,3E)-5-(3,3-DIMETHYL-1-PHENYL-1,3-DIHYDRO-2H-INDOL-2-YLIDENE)-1,3-PENTADIENYL]-3,3-DIMETHYL-1-PHENYL-3H-INDOLIUM PERCHLORATE