Showing structure for (1r,4br,5r,5ar,6r,8s,10ar,12ar)-5-(acetyloxy)-1-(furan-3-yl)-4b,10a-dihydroxy-8-(2-methoxy-2-oxoethyl)-7,7,9,12a-tetramethyl-3-oxo-5,5a,6,8,11,12-hexahydro-1h-2,10-dioxatetraphen-6-yl (2e)-2-methylbut-2-enoate