Showing structure for (12s,13r,17s,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-tetraene-17-carbaldehyde