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4-[5-[3-Carboxy-5-hydroxy-1-[(2-sulfophenyl)methyl]-1H-pyrazol-4-yl]-2,4-pentadienylidene]-4,5-dihydro-5-oxo-1-[(2-sulfophenyl)methyl]-1H-pyrazole-3-carboxylic acid tetrasodium salt Structure

4-[5-[3-Carboxy-5-hydroxy-1-[(2-sulfophenyl)methyl]-1H-pyrazol-4-yl]-2,4-pentadienylidene]-4,5-dihydro-5-oxo-1-[(2-sulfophenyl)methyl]-1H-pyrazole-3-carboxylic acid tetrasodium salt