Showing structure for (1r,2r,4s,6r,8s,9z,11s)-8-(acetyloxy)-4,9-dimethyl-14-methylidene-13-oxo-5,12-dioxatricyclo[9.3.0.0⁴,⁶]tetradec-9-en-2-yl 2-methylprop-2-enoate