Showing structure for (1s,2r,4r,6r,9s,11r)-9-(hydroxymethyl)-4-methyl-14-methylidene-8,13-dioxo-5,12-dioxatricyclo[9.3.0.0⁴,⁶]tetradecan-2-yl (2z)-2-methylbut-2-enoate