Showing structure for (1's,2r,4's,5'r,9's,10'r,13'r)-5',9'-dimethylspiro[oxirane-2,14'-tetracyclo[11.2.1.0¹,¹⁰.0⁴,⁹]hexadecan]-5'-ylmethyl (2z)-2-methylbut-2-enoate