Showing structure for methyl (1r,5r,9r,10s,12s,15s)-6,15-bis(acetyloxy)-4,5,7,10,14,14-hexamethyl-8,18-dioxo-19-oxapentacyclo[10.5.2.0¹,¹³.0²,¹⁰.0⁵,⁹]nonadeca-3,6-diene-9-carboxylate