Sodium 4,8-diacetyl-3-hydroxy-2,9a-dimethyl-7,9-dioxodibenzofuran-1-olate; 2,6-Diacetyl-7,9-dihydroxy-8,9b-dimethyldibenzofuran-1,3(2H,9bH)-dione monosodium salt
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