Showing structure for methyl (1r,2s,5s,7r,9s,10s,12s,15s)-7-(furan-3-yl)-9-methyl-4,14-dioxo-3,6,13-trioxapentacyclo[10.2.2.1²,⁵.0¹,¹⁰.0⁵,⁹]heptadecane-15-carboxylate