Showing structure for (1r,16r,19s,21r)-16,20,20-trimethyl-15-oxa-4-azahexacyclo[14.4.1.0²,¹⁴.0³,¹¹.0⁵,¹⁰.0¹⁹,²¹]henicosa-2(14),3(11),5(10),6,8,12-hexaene-8-carbaldehyde