1. Department of Chemistry and Pharmacy University of Erlangen-Nürnberg 91058 Erlangen Germany
2. Current address: Center for Biotechnology and Biomedicine Institute of Bioanalytical Chemistry Faculty of Chemistry and Mineralogy University of Leipzig 04103 Leipzig Germany
3. Department of Pharmaceutical Sciences University of Maryland School of Pharmacy 20 Penn Street Baltimore MD 21201 USA
4. CNRS, Institut de Biochimie et Génétique Cellulaires—UMR5095 University of Bordeaux 33077 Bordeaux France
5. Experimental and Clinical Research Center Charité Medical Faculty and Max Delbrück Center (MDC) for Molecular Medicine Berlin Germany