IR-125; ; sodium 4-(2-{7-[1,1-dimethyl-3-(4-sulfonatobutyl)-1H-benzo[e]indolium-2-yl]hepta-2,4,6-trien-1-ylidene}-1,1-dimethyl-1,2-dihydro-3H-benzo[e]indol-3-yl)butane-1-sulfonate; 4-[(2Z)-2-[(2Z,4E,6Z)-7-[3,3-dimethyl-1-(4-sulfonatobutyl)benzo[g]indol-1-ium-2-yl]hepta-2,4,6-trienylidene]-3,3-dimethyl-benzo[g]indol-1-yl]butylsulfonyloxysodium