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