Synonyms: 3H-Indolium,2-[4-[4-(dimethylamino)phenyl]- 1,3-butadienyl]-3,3-dimethyl-1-phenyl-,perchlorate;2-{(1E,3E)-4-[4-(Dimethylamino)phenyl]-1,3-butadienyl}-3,3-dimethyl-1-phenyl-3H-indolium perchlorate (IM OCS);2-{(1E,3E)-4-[4-(Dimethylamino)phenyl]-1,3-butadienyl}-3,3-dimethyl-1-phenyl-3H-indolium perchlorate;