Showing structure for (1r,2r,3r,4r,6r,8s,9e,12s,13s,14r,15s)-4,6,12,13-tetrakis(acetyloxy)-3-hydroxy-4,8,11,11-tetramethyl-14-[(2-methylpropanoyl)oxy]-7,18-dioxo-19-oxatricyclo[13.4.0.0²,⁶]nonadec-9-en-15-yl 2-methylpropanoate