1. Department of Pharmacy; Pharmaceutical and Medicinal Chemistry; Saarland University; Campus C2 3 66123 Saarbrücken Germany
2. Department of Chemistry; University of Paderborn; Warburger Strasse 100 33098 Paderborn Germany
3. Chemical Genomics Centre (CGC) of the Max Planck Society; Otto-Hahn-Str. 15 44227 Dortmund Germany
4. Faculty of Chemistry and Chemical Biology; TU Dortmund University; Otto-Hahn-Strasse 6 44227 Dortmund Germany
5. Department of Chemistry & Pharmaceutical Sciences; VU University Amsterdam; De Boelelaan 1083 1081 HV Amsterdam The Netherlands