1. B. Z. Usmanov, Ya. V. Rashkes, and N. K. Abubakirov, Khim. Prir. Soedin., 215 (1978).
2. R. Hardman and T. V. Benjamin, Phytochemistry, 15, 1515 (1976).
3. N. Sh. Ramazonov, Farm. Zh., 4, 20 (2004).
4. U. A. Baltaev, Bioorg. Khim., 26, 892 (2000).
5. T. A. Grimova, V. K. Pruschenko, and P. K. Yatsyuk, in: Pharmacological Correction of Blood Supply, Metabolism, and Vitality of Ischemic Myocardium [in Russian], Voronezh (1977), p. 66.