(4r)-4-[(3s,7r,10s,12s,13r,17r)-3-azido-7,12-dihydroxy-10,13-dimethyl-2,3,4,5,6,7,8,9,11,12,14,15,16,17-tetradecahydro-1h-cyclopenta[a]phenanthren-17-yl]pentanoic Acid