[4-[4-(diethylamino)-N-[4-(dioctylamino)phenyl]anilino]phenyl]-[4-(diethylamino)phenyl]-(4-dioctylazaniumylidenecyclohexa-2,5-dien-1-ylidene)azanium;[4-[4-(dimethylamino)-N-[4-(dimethylamino)phenyl]anilino]phenyl]-[4-(dioctylamino)phenyl]-(4-dioctylazaniumylidenecyclohexa-2,5-dien-1-ylidene)azanium;[4-[4-(dipropylamino)-N-[4-(dipropylamino)-3-ethylphenyl]-3-ethylanilino]phenyl]-[4-(dipropylamino)-3-ethylphenyl]-(4-dipropylazaniumylidene-3-ethylcyclohexa-2,5-dien-1-ylidene)azanium