[3,8'-Bi-4H-1-benzopyran]-4,4'-dione,2,2'-bis(3,4-dihydroxyphenyl)-2,2',3,3'-tetrahydro-3',5,5',7,7'-pentahydroxy-,[2S-[2a,3b(2'S*,3'S*)]]-; Manniflavanone
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