Showing structure for 6-(furan-3-yl)-11,18-dihydroxy-19-(2-methoxy-2-oxoethyl)-1,5,15-trimethyl-8-oxo-7,17-dioxapentacyclo[13.3.1.0²,¹¹.0⁵,¹⁰.0¹³,¹⁸]nonadec-9-en-14-yl 2-methylbut-2-enoate