The molecule is an anionic unsymmetrical C5 cyanine dye having differentially substituted indoleinine groups at each end. It has a role as a fluorochrome. It is a cyanine dye, an indolium ion and an organosulfonate oxoanion.
(2E)-3-ethyl-2-[(2E,4E)-5-[5-[(2-iodoacetyl)amino]-1,3,3-trimethylindol-1-ium-2-yl]penta-2,4-dienylidene]-1,1-dimethylbenzo[e]indole-6,8-disulfonate