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3-(3-Cyano-5-hydroxy-1-phenyl-1H-pyrazol-4-ylazo)-4-(2-methoxyethoxy)benzenesulfonic acid sodium salt Structure

3-(3-Cyano-5-hydroxy-1-phenyl-1H-pyrazol-4-ylazo)-4-(2-methoxyethoxy)benzenesulfonic acid sodium salt