Showing structure for (1r,2r,6s,8r,11r,12s,13r,16r,17r,19s,20r)-17-(acetyloxy)-8-(furan-3-yl)-1,9,11,16-tetramethyl-19-{[(2e)-2-methylbut-2-enoyl]oxy}-4-oxo-5,14-dioxapentacyclo[11.6.1.0²,¹¹.0⁶,¹⁰.0¹⁶,²⁰]icos-9-en-12-yl (2e)-2-methylbut-2-enoate