Chem Pharm Bull (Tokyo). 1998 Oct; 46(10): 1653-5.
Bile acids of Fel Ursi.
Faculty of Pharmaceutical Sciences, Kumamoto University, Japan.
The first direct separation of Fel Ursi using octadecyl silica (ODS) open column chromatography has been accomplished and provided to provide several pure, free and conjugated bile acids, the structures of which were substantiated by spectroscopic methods.