1. For leading references, seeR. Mechoulam, inMarihuana (Ed.R. Mechoulam; Academic Press, New York, N.Y. 1973), p. 1.—T. B. Vree, D. D. Breimer, C. A. M. van Ginneken andJ. M. van Rossum, J. Pharm. Pharmac.24, 7 (1972).—J. W. Fairbairn andJ. A. Liebmann, J. Pharm. Pharmac.26, 413 (1974).—H. L. Lotter, D. J. Abraham, C. E. Turner, J. E. Knapp, P. L. Schiff, Jr., andD. J. Slatkin, Tetrahedron Lett.1975, 2815.
2. Y. Obata andY. Ishikawa, Agric. biol. Chem., Japan30, 619 (1966).
3. Y. Gaoni andR. Mechoulam, J. Am. chem. Soc.93, 217 (1971).
4. R. Mechoulam andY. Gaoni, Fortschr. Chem. org. Naturstoffe25, 175 (1967).
5. F. vonSpulak, U. Claussen, H.-W. Fehlhaber andF. Korte, Tetrahedron24, 5379 (1968).