Sodium 4-isothiocyanatophenoxide 、 sodium;3-[(2E)-2-[(2Z)-2-[2-chloro-3-[(E)-2-[1,1-dimethyl-3-(3-sulfonatopropyl)benzo[e]indol-3-ium-2-yl]ethenyl]cyclohex-2-en-1-ylidene]ethylidene]-1,1-dimethylbenzo[e]indol-3-yl]propane-1-sulfonate 以
DMF (N,N-dimethyl-formamide) 为溶剂,
生成 2-[2-[2-(4-isothiocyano)phenoxy-3-[[1,3-dihydro-1,1-dimethyl-3-(3-sulfopropyl)-2H-benz[e]indol-2-ylidene]ethylidene]-1-cyclohexen-1-yl]ethenyl]-1,1-dimethyl-3-(3-sulfopropyl)-1H-benz[e]indolium, inner salt