The molecule is a C7-cyanine dye having symmetrically-substituted 2-indolyl units at each end. It has a role as a fluorochrome. It derives from a C7-indocyanine.
2-[(1E,3E,5E,7Z)-4-methyl-7-[5-sulfo-1-(2-sulfoethyl)-3H-indol-2-ylidene]hepta-1,3,5-trienyl]-1-(2-sulfoethyl)-3H-indol-1-ium-5-sulfonate