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

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