IUPAC:tripotassium 3-{6-[(2,5-dioxopyrrolidin-1-yl)oxy]-6-oxohexyl}-2-[(1E)-3-[(2Z)-3-{6-[(2,5-dioxopyrrolidin-1-yl)oxy]-6-oxohexyl}-1,1-dimethyl-6,8-disulfonato-1H,2H,3H-benzo[e]indol-2-ylidene]prop-1-en-1-yl]-1,1-dimethyl-1H-benzo[e]indol-3-ium-6,8-disulfonate
IUPAC:tripotassium 3-{6-[(2,5-dioxopyrrolidin-1-yl)oxy]-6-oxohexyl}-2-[(1E)-3-[(2Z)-3-{6-[(2,5-dioxopyrrolidin-1-yl)oxy]-6-oxohexyl}-1,1-dimethyl-6,8-disulfonato-1H,2H,3H-benzo[e]indol-2-ylidene]prop-1-en-1-yl]-1,1-dimethyl-1H-benzo[e]indol-3-ium-6,8-disulfonate