IUPAC:2-{5-[3-(5-carboxypentyl)-1,1-dimethyl-6,8-disulfo-1H,2H,3H-benzo[e]indol-2-ylidene]penta-1,3-dien-1-yl}-3-ethyl-1,1-dimethyl-6-sulfo-1H-benzo[e]indol-3-ium-8-sulfonate
IUPAC:2-{5-[3-(5-carboxypentyl)-1,1-dimethyl-6,8-disulfo-1H,2H,3H-benzo[e]indol-2-ylidene]penta-1,3-dien-1-yl}-3-ethyl-1,1-dimethyl-6-sulfo-1H-benzo[e]indol-3-ium-8-sulfonate