1. Department
of Chemistry and Biochemistry, Faculty of Chemistry and Chemical Technology, University of Ljubljana, Aškerčeva 5, P.O.
Box 537, SI-1000 Ljubljana, Slovenia
2. Department
of Chemistry, University of Coimbra, 3004-535 Coimbra, Portugal
3. Centre
for Neuroscience and Cell Biology (CNC), University of Coimbra, 3004-517 Coimbra, Portugal