Showing structure for 3-[(2r,3r,4ar,6r,7s,8s)-2-(3,4-dihydroxyphenyl)-7,8-dihydroxy-6-(hydroxymethyl)-hexahydro-2h-pyrano[2,3-b][1,4]dioxin-3-yl]-1-(3,4-dihydroxyphenyl)propan-1-one