(1R,9aR,11aS)-1-[2-({2-[(1R,9aR,11aS)-1-hydroxy-9a,11a-dimethyl-7-oxo-2,3,3a,3b,4,5,7,8,9,9a,9b,10,11,11a-tetradecahydro-1H-cyclopenta[1,2-a]phenanthren-1-yl]-2-oxoethyl}oxy)acetyl]-1-hydroxy-9a,11a-dimethyl-2,3,3a,3b,4,5,7,8,9,9a,9b,10,11,11a-tetradecahydro-1H-cyclopenta[1,2-a]phenanthren-7-one