Taurochenodeoxycholic acid-d4-1 (sodium) is the deuterium labeled Taurochenodeoxycholic acid. Taurochenodeoxycholic acid (12-Deoxycholyltaurine) sodium is one of the main bioactive substances of animals bile acid. Taurochenodeoxycholic acid sodium induces apoptosis and shows obvious anti-inflammatory and immune regulation properties[1][2].