IUPAC:sodium 1-{6-[(2,5-dioxopyrrolidin-1-yl)oxy]-6-oxohexyl}-3,3-dimethyl-2-[(1E)-3-[(2Z)-1,3,3-trimethyl-5-sulfonato-2,3-dihydro-1H-indol-2-ylidene]prop-1-en-1-yl]-3H-indol-1-ium-5-sulfonate
IUPAC:sodium 1-{6-[(2,5-dioxopyrrolidin-1-yl)oxy]-6-oxohexyl}-3,3-dimethyl-2-[(1E)-3-[(2Z)-1,3,3-trimethyl-5-sulfonato-2,3-dihydro-1H-indol-2-ylidene]prop-1-en-1-yl]-3H-indol-1-ium-5-sulfonate