REFERENCES
- Brown, J.H. (1987) In: The Pharmacological Basis of Ther- apeutics, Ed. by Gilman, A., Godman, L.S., Rall, T.W. and Murad, F., McMillan, New York, pp. 150–165.
- Capasso, A., Pinto, A., Mascolo, N., Autore, G. et al. (1991) Reduction of agonist-induced contractions of guinea-pig isolated ileum by flavonoids. Phytother. Res. 5: 85–87.
- De Feo, V. (1992) Medicinal and magical plants on northern Peruvian Andes. Fitoterapia 63: 417–440.
- Ghani, A. (1985) Cuscohygrine from some solanaceous plants. Indian J. Pharm. Sci. 47: 127–129.
- Gambaro, V.E. and Roses, O.E. (1989) La presencia de nicotina en extractos y decocciones de flores de Brug- mansia candida Pers. Acta Farm. Bonaerense 8: 17–22.
- Johnson, S.M., Westfall, D.P., Howard, S.A. and Fleming,
- W.W. (1978) Sensitivies of the isolated ileal longitudinal smooth muscle-myenteric plexus and hypogastric nerve vas deference of the guinea-pig after chronic morphine. J. Pharm. Exp. Ther. 204: 54–66.
- Okpako, D.T. and Taiwo, Y.O.O. (1984) Cyclo-oxygenase inhibitors antagonize in directly evoked contractions of the guinea-pig isolated ileum by inhibiting acetylcholine release. Br. J. Pharmac. 82: 577–585.
- Roses, O.E., Lopez, C.M. and Garcia Fernandez, J.C. (1987) Aislamiento e identificación de alcaloides del tropano en especies del género Brugmansia (Solanaceae). Acta Farm. Bonaerense 6: 167–174.
- Roses, O.E., Gambaro, V.E. and Rofi, R. (1988a) La presen- cia de nor-hioscina y hioscina en flores de Brugmansia candida Pers. como posible característica de su proceden- cia. Acta Farm. Bonaerense 7: 85–90.
- Roses, O.E., Villaamii, E.E., Garcia Fernandez, J.C. and Miño, J.H. (1988b) Accion farmacodinamica de las flores de la Brugmansia candida. Fitoterapia 59: 120–125.
- Sarazin, C., Goethals, G., Seguin, J.-P. and Barbotin, J.-N. (1991) Spectral reassignment and structure elucidation of scopolamine free base through two-dimensional NMR techniques. Magn. Res. Chem. 29: 291–300.
- Schultes, R.E. and Hoffman, A. (1973) The Botany and Chemistry of Hallucinogens. C.C. Thomas, Springfield.
- Stenberg, V.I., Narain, N.K. and Singh, P. (1977) Carbon-13 magnetic resonance of the tropane alkaloids: cocaine and atropine. J. Heterocyclic Chem. 14: 225–226.
- Tallarida, R.J. and Murray, R.B. (1987) Manual of Pharma- cologic Calculation with Computer Programs, II ed. Springer Verlag, New York.