The molecule is the cationic form of a C3 cyanine dye having 1,3-diethyl-5,6-dichloroindoleinine units at each end. It has a role as a fluorochrome. It is a cyanine dye and an indolium ion.
5,6-dichloro-2-[(E)-3-(5,6-dichloro-1,3-diethylbenzimidazol-3-ium-2-yl)prop-2-enylidene]-1,3-diethylbenzimidazole