1. Institute
of Organic Chemistry, University of Regensburg, Universitätsstrasse 31, 93053 Regensburg, Germany
2. Department
of Bioorganic Chemistry, Faculty of Chemistry, Wrocław University of Technology, Wybrzeże Wyspiańskiego 27, 50370 Wrocław, Poland
3. Institute of Pharmacy, University of Regensburg, Universitätsstrasse 31, 93053 Regensburg, Germany
4. Departament
de Química, Universitat Autònoma de Barcelona, 08193 Cerdanyola del Vallès, Spain
5. Department
of Molecular Biology, University of Salzburg, Billrothstrasse 11, 5020 Salzburg, Austria