trisodium p-[4,5-dihydro-3-methyl-4-[1-methyl-3-[3-methyl-5-oxido-1-(4-sulphonatophenyl)-1H-pyrazol-4-yl]allylidene]-5-oxo-1H-pyrazol-1-yl]benzenesulphonate

4-[[4,5-Dihydro-4-[3-[5-(sodiooxy)-3-methyl-1-[4-(sodiosulfo)phenyl]-1H-pyrazol-4-yl]-1-methyl-2-propenylidene]-3-methyl-5-oxo-1H-pyrazol]-1-yl]benzenesulfonic acid sodium salt