IUPAC:sodium 2-[3-(3,3-dimethyl-1-{5-[(prop-2-yn-1-yl)carbamoyl]pentyl}-5-sulfonato-2,3-dihydro-1H-indol-2-ylidene)prop-1-en-1-yl]-1,3,3-trimethyl-3H-indol-1-ium-5-sulfonate
IUPAC:sodium 2-[3-(3,3-dimethyl-1-{5-[(prop-2-yn-1-yl)carbamoyl]pentyl}-5-sulfonato-2,3-dihydro-1H-indol-2-ylidene)prop-1-en-1-yl]-1,3,3-trimethyl-3H-indol-1-ium-5-sulfonate