1. Department of Pharmaceutical Sciences University of Basel Klingelbergstrasse 50 4056 Basel Switzerland
2. Institute for Pharmaceutical and Medicinal Chemistry Heinrich-Heine-University of Düsseldorf Universitätsstraße 1 40225 Düsseldorf Germany
3. Biophysics Facility Biocenter of the University of Basel Klingelbergstrasse 70 4056 Basel Switzerland