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