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4-[3-Carbamoyl-4-[p-(2-hydroxyethylsulfonyl)phenylazo]-5-oxo-2-pyrazolin-1-yl]benzenesulfonic acid Structure

4-[3-Carbamoyl-4-[p-(2-hydroxyethylsulfonyl)phenylazo]-5-oxo-2-pyrazolin-1-yl]benzenesulfonic acid