Showing structure for methyl (1's,3r,5'r,6s,11'r,12'r)-6-ethyl-6-hydroxy-3'-methyl-3'-azaspiro[oxane-3,15'-tetracyclo[6.5.1.1¹,⁵.0¹¹,¹⁴]pentadecan]-8'(14')-ene-12'-carboxylate