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