1. Department of Pharmaceutical Biology
2. Kiel University
3. 24118 Kiel
4. Germany
5. Department of Pharmacy
6. Otto Diels Institute for Organic Chemistry
7. Kiel
8. Tyrolean Cancer Research Institute
9. 6020 Innsbruck
10. Austria
11. Paracelsus Medical University Salzburg
12. Department of Internal Medicine III
13. Department of Pharmaceutical and Medicinal Chemistry