IUPAC:disodium 2-[(1E,3E)-5-[(2Z)-1,1-dimethyl-7-sulfonato-3-(4-sulfonatobutyl)-1H,2H,3H-benzo[e]indol-2-ylidene]penta-1,3-dien-1-yl]-3-[5-(hydrazinecarbonyl)pentyl]-1,1-dimethyl-1H-benzo[e]indol-3-ium-7-sulfonate
IUPAC:disodium 2-[(1E,3E)-5-[(2Z)-1,1-dimethyl-7-sulfonato-3-(4-sulfonatobutyl)-1H,2H,3H-benzo[e]indol-2-ylidene]penta-1,3-dien-1-yl]-3-[5-(hydrazinecarbonyl)pentyl]-1,1-dimethyl-1H-benzo[e]indol-3-ium-7-sulfonate