chenodeoxycholic acid

:  a bile acid C₂₄H₄₀O₄ that is usually found conjugated with glycine or taurine in various vertebrates (as hens, geese, hogs, and bears) including humans, that facilitates fat absorption and cholesterol excretion, and that is used to dissolve gallstones which are not calcified ◆Chenodeoxycholic acid is often called chenodiol when it is used as a drug to dissolve gallstones.