1. F. S. Sadritdinov and A. G. Kurmukov, Pharmacology of Plant Alkaloids and Their Use in Medicine [in Russian], Meditsina, Tashkent, 1980, pp. 20–78.
2. A. G. Kurmukov and U. B. Zakirov, Alkaloids and Preparations of Medicinal Herbs for Treating Hypertension [in Russian], Ibn Sino, Tashkent, 1992, pp. 57–60.
3. Z. Subhan and I. Hindmarch, Eur. J. Clin. Pharm., 28, 567 (1985).
4. G. Szilagyi, Z. Nagy, L. Balkay, I. Boros, M. Emri, and L. S. Marian, J. Neurol. Sci., 229, 275 (2005).
5. G. I. David and S. M. Sami, J. Pharm. Sci., 68, 1403 (1979).