1. N. P. Skakun and V. V. Shman’ko, Vrach. Delo, 1, 49 – 52 (1984).
2. A. T. Soldatenkov, N. M. Kolyadina, and I. V. Shendrik, Principles of the Organic Chemistry of Drugs [in Russian], Mir, Moscow (2003), p. 192.
3. I. V. Serkov and V. V. Bezuglov, Usp. Khim., 78(5), 442 – 465 (2009).
4. Z. Rappoport (ed.), The Chemistry of Phenols, John Wiley & Sons, Jerusalem (2003), p. 842.
5. A. T. Burbello, A. V. Shabrov, and P. P. Denisenko, Modern Drugs: Clinical and Pharmacological Handbook for the Practicing Physician [in Russian], ZAO OLMAMedia Grupp, Moscow (2006), p. 401.