The molecule is the cationic form of a C3 cyanine dye having 1-ethyl-3,3-dimethylindoleinine units at each end. It has a role as a fluorochrome. It is a cyanine dye and an indolium ion.
(2E)-1-ethyl-2-[(E)-3-(1-ethyl-3,3-dimethylindol-1-ium-2-yl)prop-2-enylidene]-3,3-dimethylindole