(R)-5-{(R)-2-[(3S,8S,9S,10R,13R,14S,17R)-3-(2-Methoxy-ethoxymethoxy)-10,13-dimethyl-2,3,4,7,8,9,10,11,12,13,14,15,16,17-tetradecahydro-1H-cyclopenta[a]phenanthren-17-yl]-propyl}-3-methyl-dihydro-furan-2-one