1. For reviews, see: Schmidt, U.; Lieberknecht, A.; Haslinger, E. In The Alkaloids; Brossi, A., Ed.; Academic: New York, 1985; Vol. 26, pp. 299–326; (b) Joullié, M. M.; Nutt, R. In The Alkaloids: Chemical and Biological Perspectives; Pelletier, S. W., Ed.; Wiley: New York, 1985; Vol. 3, pp. 113–168; (c) Gournelis, D. C.; Laskaris, G. G.; Verpoorte, R. Nat. Prod. Rep. 1997, 75–82.
2. Paı̈s, M.; Jarreau, F.-X.; Lusinchi, X.; Goutarel, R. Ann. Chim. (Paris) 1966, 83–105.
3. Chemical and pharmacological studies on sedative cyclopeptide alkaloids in some Rhamnaceae plants
4. (a) Rocchiccioli, F.; Jarreau, F. X.; Païs, M. Tetrahedron 1978, 34, 2917–2926;
5. (b) Schmidt, U.; Lieberknecht, A.; Grisser, H.; Häusler, J. Angew. Chem., Int. Ed. Engl. 1981, 20, 281–282;