Showing structure for (1r,2s,4r,9r,10r,11r,12s,14r,15r,18r)-14-(acetyloxy)-10-(2-methoxy-2-oxoethyl)-7,9,11,15-tetramethyl-6-oxo-3,17-dioxapentacyclo[9.6.1.0²,⁹.0⁴,⁸.0¹⁵,¹⁸]octadec-7-en-12-yl 2-methylbut-2-enoate