1. Cooper, R., Gottlieb, H. E., Lavie, D., and Levy, E. C. (1979)Tetrahedron 35, 861.
2. International Tables for X-Ray Crystallography (1974) Vol IV, (Kynoch Press, Birmingham, Present distributor Kluwer Academic).
3. Jardine, I. (1980) InAnticancer Agents Based on Natural Product Models, J. M. Cassady, and J. D. Douros, eds. (Academic Press, New York), pp. 319?351.
4. Johnson, C. K. (1976)Ortep II, Report on ORNL-5138 (Oak Ridge National Laboratory, Tennessee).
5. Kaneko, T., and Wong, H. (1987)Tetrahedron Lett. 28, 517.