1. J. R. Boissier andG. Combes, French Patent 1.391764, Cl. A, 61K-C 07g, March 12, 1965, see Chem. Abstr.62, 15.996 (1965).
2. S. R. Johns, J. A. Lamberton andA. A. Sioumis, Chem. Commun.1968, 410.
3. J. Harley-Mason andC. G. Taylor, Chem. Commun.1969, 281. We are grateful to Dr.Harley-Mason for an authentic specimen of dihydroelaeocarpidine.
4. G. W. Gribble, J. org. Chem.35, 1944 (1970).