1. D.K. Kieslich, in: Microbial transformations of nonsteroid cyclic compounds, p. 1. Wiley-Georg Thieme, Stuttgart 1976.
2. L.L. Smith, Terpenoids Steroids4, 394 (1974).
3. L.M. Kogan, I.M. Volkova, M.I. Bukhar, N.S. Agre, I.S. Zvyagintseva, V.I. Tsurkova, M.V. Torgov and G.K. Skryabin, Chem. Abstr.69, 7880 (1968).
4. M. De Rosa, A. Gambacorta and J.D. Bu'Lock, J. gen. Microbiol.86, 156 (1975).
5. Purchased from Steraloids, Wilton, NH, USA.