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2-(1-Phenyl-3-methyl-5-oxo-4,5-dihydro-1H-pyrazol-4-yl)azo-5-chlorobenzenesulfonic acid sodium salt Structure

2-(1-Phenyl-3-methyl-5-oxo-4,5-dihydro-1H-pyrazol-4-yl)azo-5-chlorobenzenesulfonic acid sodium salt