Showing structure for (1r,2r,4s,6s,9e,11r)-4-[(acetyloxy)methyl]-9-methyl-14-methylidene-13-oxo-5,12-dioxatricyclo[9.3.0.0⁴,⁶]tetradec-9-en-2-yl (2z)-2-methylbut-2-enoate