Showing structure for (1r,2r,3r,4r,5r,7r,8r,9r,11s,12z,14r,17s)-7,9-bis(acetyloxy)-4,5,11-trihydroxy-4,8,12,17-tetramethyl-16-oxo-15,18-dioxatetracyclo[12.4.0.0¹,¹⁷.0³,⁸]octadec-12-en-2-yl acetate