(4R)-4-((3R,5R,7R,8R,9S,10S,13R,14S,17R)-3-(((4R)-4-((3S,7S,10S,13R,17R)-3,7-dihydroxy-10,13-dimethylhexadecahydro-1H-cyclopenta[a]phenanthren-17-yl)pentanoyl)oxy)-7-hydroxy-10,13-dimethylhexadecahydro-1H-cyclopenta[a]phenanthren-17-yl)pentanoic acid,Chenodeoxycholic acid Impurity