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2H-1-Benzopyran-6-carboxamide,N-(4,7-dihydroxy-8-methyl-2-oxo-2H-1-benzopyran-3-yl)-3,4-dihydro-2,2-dimethyl- cas 31589-45-4Appearance:white crystalline powder Storage:Store in dry, dark and ventilated place Package:25KG drum Application:intermediat