1. Molecular, Cellular and Pharmacobiology Section, Institute for Pharmaceutical Biology, University of Bonn, Nussallee 6, 53115 Bonn, Germany
2. Research Training Group 1873, University of Bonn, Bonn, Germany
3. Pharmaceutical Chemistry I, Institute of Pharmacy, University of Bonn, An der Immenburg 4, 53121 Bonn, Germany
4. Vanderbilt Institute of Chemical Biology, Department of Pharmacology and Department of Chemistry, Vanderbilt University, Nashville, 37232 Tennessee, United States
5. Institute of Physiology I, Life and Brain Center, Medical Faculty, University of Bonn, Sigmund-Freud-Straße 25, 53105 Bonn, Germany