Tauroursodeoxycholic acid (TUDCA) is an ambiphilic bile acid.

Also see Wikipedia entry on Tauroursodeoxycholic acid (TUDCA)

Setchell, K. D., Rodrigues, C. M., Podda, M., and Crosignani, A. Metabolism of orally administered tauroursodeoxycholic acid in patients with primary biliary cirrhosis.

The researchers tried two existing drugs - 4-phenyl butyric acid or PBA, which treats cystic fibrosis, and and tauroursodeoxycholic acid or TUDCA, which treats a liver disease.