Synonyms: 1,1',3,3,3',3'-Hexamethyl-4,4',5,5'-dibenzoindodicarbocyanineperchlorate;1,3,3,1',3',3'-Hexamethyl-4,5,4',5'-dibenzoindodicarbocyanine perchlorate;IR 676;IR 676 perchlorate;NK 2929;Organica 391;1H-Benz[e]indolium,2-[5-(1,3-dihydro-1,1,3-trimethyl-2H-benz[e]indol-2-ylidene)-1,3-pentadienyl]-1,1,3-trimethyl-,perchlorate (9CI);