Showing structure for (1s,2r,3s,4r,8r,9r,10s,11r)-3-(acetyloxy)-2,11-dimethyl-7-methylidene-6-oxo-5,14-dioxatetracyclo[9.2.1.0²,¹⁰.0⁴,⁸]tetradecan-9-yl 2-methylpropanoate