Showing structure for (1s,2e,8r,10r,11s)-6-[(acetyloxy)methyl]-10,11-dihydroxy-1,10-dimethyl-5-oxo-4,14-dioxatricyclo[9.2.1.0³,⁷]tetradeca-2,6-dien-8-yl (2e)-2-methylbut-2-enoate