1. Department of Chemical Biology Max-Planck-Institute of Molecular Physiology Otto-Hahn-Straße 11 44227 Dortmund Germany
2. Faculty of Chemistry and Chemical Biology Technical University Dortmund Otto-Hahn-Straße 6 44227 Dortmund Germany
3. Compound Management and Screening Center, Dortmund Otto-Hahn-Str. 11 44227 Dortmund Germany