1. Institute of Pharmacy, Freie Universität Berlin, Königin-Luise-Strasse 2+4, D-14195 Berlin, Germany
2. Institute of Chemistry and Biochemistry, Freie Universität Berlin, Takustrasse 3, D-14195 Berlin, Germany
3. Department of Pharmaceutical Chemistry, Institute of Pharmacy, Center for Molecular Biosciences Innsbruck, CCB—Centrum for Chemistry and Biomedicine, University of Innsbruck, Innrain 80/82, A-6020 Innsbruck, Austria