Showing structure for (1s,18r,19s,20s)-18-methyl-14-oxo-17-oxa-3,13-diazapentacyclo[11.8.0.0²,¹⁰.0⁴,⁹.0¹⁵,²⁰]henicosa-2(10),4,6,8,15-pentaene-19-carbaldehyde