1. Department of Chemistry, University of Cyprus, Nicosia, Cyprus
2. Department of Biochemistry and Biotechnology, Laboratory of Bioorganic Chemistry, University of Thessaly, Larissa, Greece
3. Institute of Biology, National Centre for Scientific Research "Demokritos", 15310 Ag. Paraskevi, Athens, Greece
4. School of Health Sciences, Department of Pharmacy, Division of Pharmaceutical Chemistry, National and Kapodistrian University of Athens, Panepistimioupoli- Zografou, 15771 Athens, Greece
5. Rega Institute for Medical Research, Katholieke Universiteit Leuven, 3000 Leuven, Belgium