Showing structure for (1r,2e,4r,11s,12s)-1-(acetyloxy)-7-[(acetyloxy)methyl]-2,11-dimethyl-6-oxo-5,14-dioxatricyclo[9.2.1.0⁴,⁸]tetradeca-2,7-dien-12-yl (2e)-2-methylbut-2-enoate