Showing structure for (12r,16r,17s,18s)-11-(2-hydroxyacetyl)-16-methyl-15-oxa-1,11-diazapentacyclo[15.3.1.0⁴,¹².0⁵,¹⁰.0¹³,¹⁸]henicosa-5,7,9,13-tetraen-20-one