Showing structure for methyl (2s,3r,5r,10s)-2,6-dimethyl-21-oxo-14-oxa-8-azahexacyclo[11.6.1.1⁵,¹⁹.0²,¹⁰.0³,⁸.0¹⁷,²⁰]henicosa-1(19),13(20),17-triene-18-carboxylate