28263-69-6

3H-Indolium,2-[3-[1,3-dihydro-3,3-dimethyl-1-(3-sulfopropyl)-2H-indol-2-ylidene]-1-propen-1-yl]-3,3-dimethyl-1-(3-sulfopropyl)-,iodide, sodium salt (1:1:2)