Synonyms: 3H-Indolium,2-[2-[3-[[1,3-dihydro-3,3-dimethyl-1-(4-sulfobutyl)-2H-indol-2-ylidene]ethylidene]-2-[(4-isothiocyanatophenyl)thio]-1-cyclohexen-1-yl]ethenyl]-3,3-dimethyl-1-(4-sulfobutyl)-,monosodium salt (9CI);1'-Bis(4-sulfobutyl)-11-(4-isothiocyanatophenylthio)-3,3,3',3'-tetramethyl-10,12-trimethyleneindotricarbocyaninemonosodium salt