1) Institute of Physical Organic Chemistry, National Academy of Sciences of Belarus, Minsk, e-mail: potkin@ifoch.bas- net.by; 2) Institute of Bioorganic Chemistry, National Academy of Sciences of Belarus, Minsk, e-mail: amalama@mail.ru; 3) Republican Scientific-Practical Medical Center, Minsk, e-mail: dubovick@mail.ru. Translated from Khimiya Prirodnykh Soedinenii, No. 2, pp. 164-169, March-April, 2005. Original article submitted December 20, 2004.