An Formal Web site of The usa government. Here is how you are aware of we're official. dot gov icon Nonabsorbed ursodiol passes in to the colon the place it is generally 7-dehydroxylated to lithocholic acid. Some ursodiol is epimerized to chenodiol (CDCA) by using a seven-oxo intermediate. Chenodiol https://www.youtube.com/watch?v=A07qHOeWON8