1. D. R. Babin, T. Bögri, J. A. Findlay, H. Reinshagen, Z. Valenta, andK. Wiesner, Exper.21, 425 (1965).
2. D. R. Babin, T. P. Forrest, Z. Valenta, andK. Wiesner, Exper.18, 549 (1962).
3. See alsoK. Wiesner, XIXth International Congress of Pure and Applied Chemistry, London (Butterworths, 1963), p. 285.
4. D. R. Babin, J. A. Findlay, T. P. Forrest, F. Fried, M. Götz, Z. Valenta, andK. Wiesner, Tetrahedron Letters No. 15, 31 (1960).
5. R. B. Woodward, Special Lecture at the 3rd International Symposium on Chemistry of Natural Products at Kyoto (Japan) (Butterworths, London 1964), p. 49.