Showing structure for (1s,2s,4r,7s,8r,10s)-12-[(acetyloxy)methyl]-7-hydroxy-4,8-dimethyl-13-oxo-3,14-dioxatricyclo[9.3.0.0²,⁴]tetradec-11-en-10-yl 2-methylprop-2-enoate