Showing structure for (1s,2r,3s,6s,9r,10s,11r,14r,17s,18r)-12-ethyl-17-methoxy-14-methyl-4-oxo-5-oxa-12-azahexacyclo[8.7.2.1²,⁶.0¹,¹¹.0³,⁹.0¹⁴,¹⁸]icosan-9-yl acetate