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Product Description Usnic Acid & Usnic Acid Sodium (GL-UA) CAS Number: 7562- 61-0 Synonym: 2, 6- diacetyl- 1, 2, 3, 9b- tetrahydro- 7, 9- dihydroxy- 8, 9b- dimethyldibenzofuran- 1, 3- dione Origin: ...