[4,8'-Bi-2H-1-benzopyran]-3,3',5,5',7,7'-hexol,3,3',4,4'-tetrahydro-2,2'-bis(3,4,5-trihydroxyphenyl)-, [2R-[2a,3a,4b(2'R*,3'S*)]]-; Prodelphinidin B1
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