Showing structure for (1s,2s,3ar,5s,10r,11s,13r,13ar)-3a,10,11,13-tetrakis(acetyloxy)-2,5,8,8-tetramethyl-12-methylidene-4,9-dioxo-1h,2h,3h,5h,10h,11h,13h,13ah-cyclopenta[12]annulen-1-yl acetate