1. Institute of Physical Organic Chemistry; National Academy of Sciences of Belarus; Surganova str. 13 220072 Minsk Belarus
2. Department of Chemistry; Belarusian State University; 220050 Minsk, Leningradskaya 14 Belarus
3. Department of Chemistry and Biological Chemistry; School of Physical and Mathematical Sciences, Nanyang Technological University; 21 Nanyang Link Singapore 637371
4. Department of Chemistry and Vanderbilt Institute of Chemical Biology; Vanderbilt University; Nashville, TN 37235 USA
5. Division of Nutritional Sciences; Cornell University, Savage Hall; Ithaca, NY 14853 USA
6. Retrotope, Inc; 4300 El Camino Real, Suite 201 Los Altos, CA 94022 USA