The molecule is an anionic C3 cyanine-type compound having indoleinine and tetrahydropyrano[2,3-f]pyrido[3,2,1-ij]quinoline substituents at either end. It has a role as a fluorochrome.
2-[(E,3E)-3-(4-tert-butyl-3-oxa-13-azatetracyclo[7.7.1.02,7.013,17]heptadeca-1(17),2(7),4,8-tetraen-6-ylidene)prop-1-enyl]-3-(3-carboxypropyl)-3-methyl-1-(3-sulfonatopropyl)indol-1-ium-5-sulfonate