Showing structure for (2r)-3-[(1r,4r,5ar,9ar,9br,11as)-4-(acetyloxy)-3b,6,6,9a,11a-pentamethyl-7-oxo-1h,2h,4h,5h,5ah,9bh,10h,11h-cyclopenta[a]phenanthren-1-yl]-5-(3,3-dimethyloxiran-2-yl)oxolan-2-yl acetate