1. Institute of Pharmaceutical and Medicinal Chemistry Heinrich Heine University Düsseldorf 40225 Düsseldorf Germany
2. Griffith Institute for Drug Discovery, Griffith University Don Young Road, Nathan Campus QLD 4111 Australia
3. Department of Pediatrics School of Medicine University of California, San Diego 9500 Gilman Drive 0741 La Jolla CA 92093 USA
4. Pharmaceutical/Medicinal Chemistry, Institute of Pharmacy Leipzig University Brüderstraße 34 04103 Leipzig Germany