Showing structure for 6-({4-ethenyl-4a-hydroxy-8-oxo-3h,4h,5h,6h-pyrano[3,4-c]pyran-3-yl}oxy)-4,5-dihydroxy-2-(hydroxymethyl)oxan-3-yl 3-(3,4-dihydroxyphenyl)prop-2-enoate