Showing structure for (1e,3s,4r,6r,7e,10s)-12-[(acetyloxy)methyl]-3-hydroxy-8-(hydroxymethyl)-3-methyl-13-oxo-5,14-dioxatricyclo[9.3.0.0⁴,⁶]tetradeca-1,7,11-trien-10-yl (2z)-2-methylbut-2-enoate