tripotassium p-[4,5-dihydro-3-methyl-4-[5-[3-methyl-5-oxido-1-(4-sulphonatophenyl)-1H-pyrazol-4-yl]penta-2,4-dienylidene]-5-oxo-1H-pyrazol-1-yl]benzenesulphonate

4-[[4,5-Dihydro-4-[5-[[5-potassiooxy-3-methyl-1-(4-potassiosulfophenyl)-1H-pyrazol]-4-yl]-2,4-pentadienylidene]-3-methyl-5-oxo-1H-pyrazol]-1-yl]benzenesulfonic acid potassium salt