1. Institute for Pharmacy and Food Chemistry, University of Wuerzburg, DE-97074 Wuerzburg, Germany
2. Department of Biochemistry, Rudolf Virchow Center, University of Wuerzburg, Josef-Schneider-Straße 2, DE-97080 Wuerzburg, Germany
3. Institute of Organic Chemistry, University of Wuerzburg, DE-97074 Wuerzburg, Germany
4. Novartis Pharma AG, Lichtstraße 35, CH-4002 Basel, Switzerland