Taurochenodeoxycholic acid-d 9 (sodium) is the deuterium labeled Taurochenodeoxycholic acid sodium. Taurochenodeoxycholic acid sodium salt (12-Deoxycholyltaurine sodium salt) is one of the main bioactive substances of animals' bile acid. Taurochenodeoxycholic acid induces apoptosis and shows obvious anti-inflammatory and immune regulation properties.