Showing structure for (1s,2s,3r,7s,8s,9r,13s)-3,8-dimethyl-13-[(3-methylbutanoyl)oxy]-12-methylidene-4,11-dioxo-10-oxatricyclo[7.3.1.0³,⁷]tridec-5-en-2-yl (2z)-2-[(acetyloxy)methyl]but-2-enoate