1. NCSR “Demokritos”, P.O. Box 60228, GR-153
10 Ag. Paraskevi, Athens, Greece
2. Institut
für Organische Chemie, Universität Leipzig, Johannisallee 29, D-04103 Leipzig, Germany
3. Agricultural University of Athens, Iera Odos 75, GR-118 55 Athens, Greece