Showing structure for (1s,2r,3r,4s,5s,6s,8r,9s,10s,13r,16s,17r,18s)-11-ethyl-6,16,18-trimethoxy-13-methyl-11-azahexacyclo[7.7.2.1²,⁵.0¹,¹⁰.0³,⁸.0¹³,¹⁷]nonadecane-4,8,9-triol