1. Department of Pharmaceutical/Medicinal Chemistry, Eberhard-Karls-University Tübingen, Auf der Morgenstelle 8, 72076 Tübingen, Germany
2. Institute of Organic Chemistry, University Mainz, Duesbergweg 10-14, 55099 Mainz, Germany
3. c-a-i-r biosciences GmbH, Paul-Ehrlich-Strasse 15, 72076 Tübingen, Germany