Showing structure for methyl (1r,2s,5s,6s,7r,8r,11s,17r,18r)-8-hydroxy-2,6-dimethyl-4-oxa-9-azaheptacyclo[12.5.1.1³,⁷.0¹,⁸.0²,¹¹.0⁵,⁹.0¹⁷,²⁰]henicos-14(20)-ene-18-carboxylate