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4-{4-[(1E,3E)-5-(1,3-dibutyl-2,4,6-trioxotetrahydropyrimidin-5(2H)-ylidene)penta-1,3-dien-1-yl]-3-methyl-5-oxo-4,5-dihydro-1H-pyrazol-1-yl}benzenesulfonic acid related products: