Showing structure for methyl (1r,2s,3r,5r,10s,16r)-2,6-dimethyl-20-oxo-8-azahexacyclo[11.5.1.1¹,⁵.0²,¹⁰.0³,⁸.0¹⁶,¹⁹]icos-13(19)-ene-17-carboxylate