Showing structure for methyl 2-hydroxy-5,9-dimethyl-20-oxa-3-azaheptacyclo[11.5.2.1³,¹⁰.0¹,⁹.0²,⁶.0¹³,¹⁹.0¹⁶,¹⁹]henicos-16-ene-17-carboxylate