IUPAC:2-{7-[1-(5-carboxylatopentyl)-3,3-dimethyl-2,3-dihydro-1H-indol-2-ylidene]hepta-1,3,5-trien-1-yl}-1,3,3-trimethyl-3H-indol-1-ium
IUPAC:2-{7-[1-(5-carboxylatopentyl)-3,3-dimethyl-2,3-dihydro-1H-indol-2-ylidene]hepta-1,3,5-trien-1-yl}-1,3,3-trimethyl-3H-indol-1-ium