Showing structure for methyl (1s,15r,17s,18s)-17-ethyl-11-hydroxy-14-oxo-3,13-diazapentacyclo[13.3.1.0²,¹⁰.0⁴,⁹.0¹³,¹⁸]nonadeca-2(10),4,6,8-tetraene-1-carboxylate