Showing structure for 1-[(12s,13r,18r)-3,20-dimethyl-15-oxa-3,20-diazapentacyclo[10.7.1.0²,¹⁰.0⁴,⁹.0¹³,¹⁸]icosa-2(10),4,6,8,16-pentaen-17-yl]ethanone