Showing structure for methyl (1'r,3r,5's,11'r,12'r)-6-ethyl-3'-methyl-2,4-dihydro-3'-azaspiro[pyran-3,15'-tetracyclo[6.5.1.1¹,⁵.0¹¹,¹⁴]pentadecan]-8'(14')-ene-12'-carboxylate