Showing structure for (3r,7r,9s)-9-methoxy-4-methyl-11,16,18-trioxa-4-azapentacyclo[11.7.0.0²,¹⁰.0³,⁷.0¹⁵,¹⁹]icosa-1(20),2(10),13,15(19)-tetraen-12-one