Showing structure for 2,14,15-tris(acetyloxy)-3-hydroxy-4,9,13-trimethyl-17-methylidene-12-[(2-methylpropanoyl)oxy]-5-oxo-6-oxatricyclo[11.4.0.0³,⁷]heptadec-8-en-10-yl 3-methylbutanoate