... Please enable JavaScript to use all the features on this page. Tetrahedron. Volume 21, Issue 5, 1965, Pages 1223-1229. Cover image. ... Download full text in PDF. Tetrahedron, 1965. Vol. 21. pp. 1223 to 1229. ... 3. R. Mechoulam, Y. Shvo. Tetrahedron, 19 (1963), p. 2073. 4. J. Levine ...