3-[(3s,5r,8r,10s,13r,14s,17r)-14-hydroxy-10,13-dimethyl-3-[(2r,3r,4r,5r,6s)-3,4,5-trihydroxy-2,6-dimethyloxan-2-yl]oxy-1,2,3,4,5,6,7,8,9,11,12,15,16,17-tetradecahydrocyclopenta[a]phenanthren-17-yl]-2h-furan-5-one