1. Institute of Pharmacy, Freie Universität Berlin, Königin-Luise-Strasse 2 + 4, 14195 Berlin, Germany
2. Institute of Chemistry and Biochemistry, Freie Universität Berlin, Fabeckstrasse 34-36, 14195 Berlin, Germany
3. Institute of Pharmacy, University Innsbruck, Innrain 80/82, A-6020 Innsbruck, Austria