Showing structure for (1s,2s,6r,8s,11s,12r,13s,16s,17s,19r,20s)-17-(acetyloxy)-19-hydroxy-1,9,11,16-tetramethyl-8-(2-oxo-5h-furan-3-yl)-5,14-dioxapentacyclo[11.6.1.0²,¹¹.0⁶,¹⁰.0¹⁶,²⁰]icos-9-en-12-yl (2e)-2-methylbut-2-enoate