5,7-Bis(2-hydroxyethoxy)-2-[3-hydroxy-4-(2-hydroxyethoxy)phenyl]-3-[3,4,5-trihydroxy-6-[(3,4,5-trihydroxy-6-methyl-tetrahydropyran-2-yl)oxymethyl]tetrahydropyran-2-yl]oxy-chromen-4-one;
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