Showing structure for (1r,2r,4r,6r,8s,9z,11r)-4,9-dimethyl-14-methylidene-8-[(2-methylpropanoyl)oxy]-13-oxo-5,12-dioxatricyclo[9.3.0.0⁴,⁶]tetradec-9-en-2-yl (2r,3r)-2,3-dimethyloxirane-2-carboxylate