Showing structure for (2r,4r,8s,9s,10s,11s)-10-hydroxy-2,11-dimethyl-7-methylidene-6,12-dioxo-5,14-dioxatricyclo[9.2.1.0⁴,⁸]tetradec-1(13)-en-9-yl (2e)-2-methylbut-2-enoate