sodium 6,7-dihydroxy-2-oxo-2H-1-benzopyran-4-methylsulphonate;2-Oxo-6,7-dihydroxy-2H-1-benzopyran-4-ylmethanesulfonic acid sodium salt;6,7-Dihydroxy-2-oxo-2H-1-benzopyran-4-methanesulfonic acid sodium salt
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