1. Institute of Physical Organic Chemistry, Surganova 13, 220072 Minsk, Belarus, Shemyakin-Ovchinnikov Institute of Bioorganic Chemistry, Miklukho-Maklaya 16/10, 117997 Moscow, Russia, Institute of Physics, Nezavisimosti av. 70, 220072 Minsk, Belarus, and Institute of Bioorganic Chemistry, Kuprevicha 5/2, 220141, Minsk, Belarus