Showing structure for (1r,2r,4s,7r,9s,11r)-13-[(acetyloxy)methyl]-4,9-dimethyl-14-oxo-3,8,15-trioxatetracyclo[10.3.0.0²,⁴.0⁷,⁹]pentadec-12-en-11-yl 2-methylprop-2-enoate