- Bile acids of marsupials. 2. Hepatic formation of vulpecholic acid (1 alpha,3 alpha,7 alpha-trihydroxy-5 beta-cholan-24-oic acid) from chenodeoxycholic acid in a marsupial, Trichosurus vulpecula (Lesson). St Pyrek, J., Lee, S.P., Thomsen, L., Tasman-Jones, C., Leydon, B. J. Lipid Res. (1991)