3,3-Dimethyl-2-[2-[2-chloro-3-[2-[1,3-dihydro-3,3-dimethyl-5-sulfo-1-(4-sulfobutyl)-2H-indol-2-ylidene]ethylidene]-1-cyclohexen-1-yl]ethenyl]-5-sulfo-1-(4-sulfobutyl)-3H-indolium inner salt trisodium salt
3,3-DIMETHYL-2-[2-[2-CHLORO-3-[2-[1,3-DIHYDRO-3,3-DIMETHYL-5-SULFO-1-(4-SULFOBUTYL)-2H-INDOL-2-YLIDENE]ETHYLIDENE]-1-CYCLOHEXEN-1-YL]ETHENYL]-5-SULFO-1-(4-SULFOBUTYL)-3H-INDOLIUM INNER SALT TRISODIUM SALT