IUPAC:2-{3-[3-(5-carboxylatopentyl)-1,1-dimethyl-1H,2H,3H-benzo[e]indol-2-ylidene]prop-1-en-1-yl}-1,1,3-trimethyl-1H-benzo[e]indol-3-ium
IUPAC:2-{3-[3-(5-carboxylatopentyl)-1,1-dimethyl-1H,2H,3H-benzo[e]indol-2-ylidene]prop-1-en-1-yl}-1,1,3-trimethyl-1H-benzo[e]indol-3-ium