(4R)-4-Propionylphenyl 4-((5S,6R,7R,8S,9S,10S,13R,14S,17R)-6-ethyl-3,7-dihydroxy-10,13-dimethylhexadecahydro-1H-cyclopenta[a]phenanthren-17-yl)pentanoate-D3 is an intermediate in the synthesis of Tauro 6-Ethlchenodeoxycholic Acid-d5 Sodium Salt (T009027), which is the labelled version of Tauro 6-Ethlchenodeoxycholic Acid Sodium Salt (T009025) which can be otained from 6-Ethylchenodeoxycholic Acid (E899810), a derivative of the bile acid Chenodeoxycholic Acid (C291900). 6-Ethylchenodeoxycholic Acid (E899810) is a potent activator of the farnesoid X nuclear receptor which reduces liver fat and fibrosis in animal models of fatty liver disease.