Showing structure for (1r,11r,13s,16r,18r)-18-ethoxy-11-methoxy-5,7,12-trioxa-15-azapentacyclo[11.7.0.0¹,¹⁶.0²,¹⁰.0⁴,⁸]icosa-2,4(8),9,19-tetraene