Showing structure for (1s,2r,3s,4r,7s,8z,12r,13s,17s)-12-(acetyloxy)-3,17-dihydroxy-4,9,13,17-tetramethyl-5,16-dioxo-6-oxatricyclo[11.4.0.0³,⁷]heptadeca-8,14-dien-2-yl acetate