title: Nuclear magnetic resonance spectrometry and liquid chromatography of two bile acid epimers: ursodeoxycholic and chenodeoxycholic acid.
abstract: A specific reverse-phase high-performance liquid chromatographic (HPLC) technique is described for the analysis of bile acids and their conjugates in human serum. Precise quantitation is obtained using UV detection. 13C-NMR spectrometry suggests a structural explanation for the different HPLC retention times of chenodeoxycholic acid, its epimer (ursodeoxycholic acid), and their methyl esters.
mesh_terms: D055598:Chemical Phenomena; D002621:Chemistry; D002635:Chenodeoxycholic Acid / Q000032:analysis* / Q000097:blood; D002851:Chromatography, High Pressure Liquid / Q000379:methods; D003840:Deoxycholic Acid / Q000031:analogs & derivatives*; D006801:Humans; D006860:Hydrogen Bonding; D009682:Magnetic Resonance Spectroscopy / Q000379:methods; D008968:Molecular Conformation; D014580:Ursodeoxycholic Acid / Q000032:analysis* / Q000097:blood
chemical_list: D003840:Deoxycholic Acid; D002635:Chenodeoxycholic Acid; D014580:Ursodeoxycholic Acid