1. Chemical Genomics Centre of the Max Planck Society Otto-Hahn-Strasse 15 44227 Dortmund Germany
2. Department of Chemistry and Pharmaceutical SciencesVU University Amsterdam De Boelelaan 1083 1081 HZ Amsterdam The Netherlands
3. Department of PharmacyUniversity of Naples “Federico II” Via D. Montesano 49, 80131 Naples Italy