1. Professor Dr. W, et al. Study of human isoursodeoxycholic acid metabolism.Journal of Hepatology.Volume 26, Issue 4, April 1997, Pages 863-8702. Purucker E, et al., Metabolism and effects on cholestasis of isoursodeoxycholic and ursodeoxycholic acids in bile duct ligated rats. Biochim Biophys Acta. 2001 Apr 3;1526(1):44-52.