Showing structure for 1-[(1r,12r,13r,18r)-3,16,20-trimethyl-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