Showing structure for 6-{[3,4-dihydroxy-6-(hydroxymethyl)-5-({3-methyl-8-oxo-1h,3h,4h,5h,6h-pyrano[3,4-c]pyran-1-yl}oxy)oxan-2-yl]oxy}-5-ethenyl-4a-hydroxy-3h,4h,5h,6h-pyrano[3,4-c]pyran-1-one