Showing structure for (1r,4s,5r,9r,10s,13r,15s)-5-(methoxycarbonyl)-5,9-dimethyl-14-methylidenetetracyclo[11.2.1.0¹,¹⁰.0⁴,⁹]hexadecan-15-yl (2s,3r)-2,3-dimethyloxirane-2-carboxylate