Showing structure for 6-(furan-3-yl)-16-(2-methoxy-2-oxoethyl)-5,15,15-trimethyl-8,17-dioxo-7-oxatetracyclo[11.3.1.0²,¹¹.0⁵,¹⁰]heptadec-10-en-14-yl 2-methylbut-2-enoate