Showing structure for (1r,2r,6s,8s,11r,12s,13r,16r,17r,19s,20r)-17,19-bis(acetyloxy)-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