[4,8'-Bi-2H-1-benzopyran]-3,3',5',7,7'-pentol,2,2'-bis(3,4-dihydroxyphenyl)-3,3',4,4'-tetrahydro-, [2R-[2a,3b,4a(2'R*,3'S*)]]-; Fisetinidol-(4a-8)-catechin
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