1. Pharmaceutical and Medicinal Chemistry; Institute of Pharmacy and Food Chemistry; Julius Maximilian University of Würzburg; Am Hubland 97074 Würzburg Germany
2. Department of Pharmacology and Toxicology; Julius Maximilian University of Würzburg; Versbacher Strasse 9 97078 Würzburg Germany
3. Rudolf Virchow Center for Experimental Biomedicine; Julius Maximilian University of Würzburg; Josef Schneider Strasse 2 97080 Würzburg Germany
4. Current address: Institute for Molecular Cell Biology; CMB-Center for Molecular Biomedicine; University Hospital Jena, Friedrich Schiller University Jena; Hans-Knöll-Strasse 2 07745 Jena Germany