The molecule is the cationic form of a C7 cyanine dye having 3,3-dimethyl-1-octadecylindoleinine units at each end. It has a role as a fluorochrome. It is a cyanine dye and an indolium ion.
(2E)-2-[(2E,4E,6E)-7-(3,3-dimethyl-1-octadecylindol-1-ium-2-yl)hepta-2,4,6-trienylidene]-3,3-dimethyl-1-octadecylindole