Showing structure for 20-(acetyloxy)-6-(furan-3-yl)-11,18,19-trihydroxy-5,10,14-trimethyl-3,8-dioxo-16-oxapentacyclo[12.3.3.0¹,¹³.0²,¹⁰.0⁵,⁹]icosan-15-yl 2-methylpropanoate