1. Department of Organic and Bioorganic Chemistry SSI “Institute for Single Crystals” NAS of Ukraine 60 Nauky ave. Kharkiv 61072 Ukraine
2. Department of Chemistry University of Michigan 930 N. University Ave Ann Arbor, MI 48109 United States of America
3. Institute of Organic Chemistry and Biochemistry Czech Academy of Sciences Flemingovo nam. 2 16610 Prague Czech Republic
4. Department of Chemistry V. N. Karazin Kharkiv National University 4 Svobody sq. Kharkiv 61022 Ukraine
5. Institut für Organische Chem. und Makromolekulare Chem Heinrich-Heine-Universität Düsseldorf Universitätsstrasse 1 Düsseldorf D-40225 Germany