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