Showing structure for methyl 6,15-bis(acetyloxy)-8-hydroxy-4,5,7,10,14,14-hexamethyl-18-oxo-19,20-dioxahexacyclo[10.5.2.1⁴,⁷.0¹,¹³.0²,¹⁰.0⁵,⁹]icos-2-ene-9-carboxylate