IUPAC:2-[(1E,3E)-5-[(2E)-1-(5-{[(2R)-2-azaniumyl-2-carboxylatoethyl]carbamoyl}pentyl)-3,3-dimethyl-5-sulfo-2,3-dihydro-1H-indol-2-ylidene]penta-1,3-dien-1-yl]-1,3,3-trimethyl-3H-indol-1-ium-5-sulfonate
IUPAC:2-[(1E,3E)-5-[(2E)-1-(5-{[(2R)-2-azaniumyl-2-carboxylatoethyl]carbamoyl}pentyl)-3,3-dimethyl-5-sulfo-2,3-dihydro-1H-indol-2-ylidene]penta-1,3-dien-1-yl]-1,3,3-trimethyl-3H-indol-1-ium-5-sulfonate