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4H-1-Benzopyran-4-one,8-[6-(5,7-dihydroxy-4-oxo-4H-1-benzopyran-2-yl)-2,3-dihydroxyphenyl]-2-[2-[2-(3,4-dihydroxyphenyl)-5,7-dihydroxy-4-oxo-4H-1-benzopyran-8-yl]-3,4-dihydroxyphenyl]-5,7-dihydroxy-,s related products: