Showing structure for (2r,3r,4s)-2-(3,4-dihydroxyphenyl)-6-[(2r,3r,4s)-3,7,8-trihydroxy-2-(4-hydroxyphenyl)-3,4-dihydro-2h-1-benzopyran-4-yl]-3,4-dihydro-2h-1-benzopyran-3,4,7,8-tetrol