1. Institute of Pharmacy, Faculty of Chemistry and Pharmacy, University of Regensburg, Universitätsstr. 31, D-93053 Regensburg, Germany
2. School of Life Sciences, University of Nottingham, Queen’s Medical Centre, Derby Road, Nottingham NG7 2UH, U.K.
3. Department of Chemistry and Pharmacy, Medicinal Chemistry, Friedrich Alexander University, Nikolaus-Fiebiger-Straße 10, D-91058 Erlangen, Germany