Showing structure for methyl (1r,2s,10s,16s,17r,18r)-18-(acetyloxy)-15-ethylidene-3-methyl-19-oxa-3,13-diazahexacyclo[14.3.1.0²,¹⁰.0²,¹³.0⁴,⁹.0¹⁰,¹⁷]icosa-4,6,8-triene-17-carboxylate