1. Department
of Chemistry, POB 55, 00014 University of Helsinki, Helsinki, Finland
2. Institute
of Pharmaceutical Sciences, University of Tübingen, Auf
der Morgenstelle 8, 72076, Tübingen, Germany
3. Institute
of Biomedicine and Neuroscience Center, POB 63, 00014 University of Helsinki, Helsinki, Finland
4. Laboratory
of Organic Chemistry, Department of Chemistry, POB 55,
00014 University of Helsinki, Helsinki, Finland