Showing structure for (1s,2r,4r,5r,7r,8r,9z,11s)-8-(acetyloxy)-4-hydroxy-4,9-dimethyl-14-methylidene-13-oxo-6,12-dioxatricyclo[9.3.0.0⁵,⁷]tetradec-9-en-2-yl (2z)-2-methylbut-2-enoate