1. Department of Organic Chemistry; Nizhny Novgorod State University; Gagarina av. 23 603950 Nizhny Novgorod Russian Federation
2. Department of Chemistry; M. V. Lomonosov Moscow State University; Vorobyevy Gory 119992 Moscow Russian Federation
3. Shemyakin-Ovchinnikov Institute of Bioorganic Chemistry RAS; Moscow Russian Federation
4. Department of Chemistry; University of Cologne; Greinstrasse 4 50939 Köln Germany