1. A. Li, Drug Discovery Today, 9, 685 (2004).
2. J. Chamberlain, in: The Analysis of Drugs in Biological Fluids, CRC Press Inc., (1995), p. 67.
3. M. Sander, Chem. Rev., 66, 341 (1966).
4. A. A. Tomashevskii, V. V. Sokolov, and A. A. Potekhin, Russ. J. Org. Chem., 39, 226 (2003).
5. F. A. Khaliullin, V. A. Kataev, and Yu. V. Strokin, Khim. Geterotsikl. Soedin., 516 (1991). [Chem. Heterocycl. Comp., 27, 410 (1991)].