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