IUPAC:trisodium 2-[(1E)-2-[(3E)-3-{2-[(2E)-3,3-dimethyl-5-sulfonato-1-(4-sulfonatobutyl)-2,3-dihydro-1H-indol-2-ylidene]ethylidene}-2-(4-sulfonatophenoxy)cyclohex-1-en-1-yl]ethenyl]-1-{6-[(2,5-dioxopyrrolidin-1-yl)oxy]-6-oxohexyl}-3,3-dimethyl-3H-indol-1-ium-5-sulfonate
IUPAC:trisodium 2-[(1E)-2-[(3E)-3-{2-[(2E)-3,3-dimethyl-5-sulfonato-1-(4-sulfonatobutyl)-2,3-dihydro-1H-indol-2-ylidene]ethylidene}-2-(4-sulfonatophenoxy)cyclohex-1-en-1-yl]ethenyl]-1-{6-[(2,5-dioxopyrrolidin-1-yl)oxy]-6-oxohexyl}-3,3-dimethyl-3H-indol-1-ium-5-sulfonate