1. V. V. Plemenkov, Introduction to the Chemistry of Natural Compounds [in Russian], Kazan′, 2001, 376 pp.
2. D. D. McKemy, Mol. Pain, 16, 2 (2005).
3. R. Eccles, J. Pharm. Pharmacol., 46, 624 (1994).
4. B. K. Lau, S. Karim, A. K. Goodchild, C. W. Vaughan, and G. M. Drew, Br. J. Pharmacol., 171, 2804 (2014).
5. V. V. Bagmetova, L. E. Borodkina, I. N. Tyurenkov, V. M. Berestovitskaya, and O. S. Vasil′eva, Fundam. Issled., 10, 467 (2011).