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4-[4-[5-(2-Hydroxyethylsulfonyl)-2-methoxyphenylazo]-3-methyl-5-oxo-2-pyrazolin-1-yl]benzenesulfonic acid Structure

4-[4-[5-(2-Hydroxyethylsulfonyl)-2-methoxyphenylazo]-3-methyl-5-oxo-2-pyrazolin-1-yl]benzenesulfonic acid