1. Institute of Pharmaceutical Sciences, Department of Chemistry and Applied BioSciences, Swiss Federal Institute of Technology (ETH) Zurich, Winterthurerstrasse 190, CH-8057 Zürich, Switzerland
2. Technological Education Institute, School of Agricultural Production, Lab. of Taxonomy and Management of Wild Flora, Stavromenos P. O. Box 140, Heraclion-Crete, 71110, Greece
3. Departement of Pharmacognosy and Chemistry of Natural Products, School of Pharmacy, Panepistimiopolis, Zografou, GR-15771, Athens, Greece
4. Zentrum für Operative Medizin I, Medizinische Einrichtungen der Heinrich-Heine- Universität Düsseldorf, Universitätsstrasse 1, D-40225 Düsseldorf, Germany