... Please enable JavaScript to use all the features on this page. Tetrahedron Letters. Volume 36, Issue 39, 25 September 1995, Pages 7031–7034. ... Tetrahedron Lett., 34 (1993), pp. 4447–4448. ... (b) ,in: A. Brossi (Ed.), The Alkaloids, vol 26Acad. Press, NY (1985), pp. 299–326. ...