Ursodeoxycholic acid sodium salt

Formula : C24-H40-O4.Na
CAS : 2898-95-5 

An epimer of chenodeoxycholic acid. It is a mammalian bile acid found first in the bear and is apparently either a precursor or a product of chenodeoxycholate. Its administration changes the composition of bile and may dissolve gallstones. It is used as a cholagogue and choleretic.