IUPAC:sodium 5-{[(2,5-dioxocyclopentyl)oxy]carbonyl}-2-[(1E,3E,5E)-7-[(2E)-5-{[(2,5-dioxopyrrolidin-1-yl)oxy]carbonyl}-3,3-dimethyl-1-(4-sulfonatobutyl)-2,3-dihydro-1H-indol-2-ylidene]hepta-1,3,5-trien-1-yl]-3,3-dimethyl-1-(4-sulfonatobutyl)-3H-indol-1-ium
IUPAC:sodium 5-{[(2,5-dioxocyclopentyl)oxy]carbonyl}-2-[(1E,3E,5E)-7-[(2E)-5-{[(2,5-dioxopyrrolidin-1-yl)oxy]carbonyl}-3,3-dimethyl-1-(4-sulfonatobutyl)-2,3-dihydro-1H-indol-2-ylidene]hepta-1,3,5-trien-1-yl]-3,3-dimethyl-1-(4-sulfonatobutyl)-3H-indol-1-ium