1. Department of Chemistry and Polymer Science Stellenbosch University Matieland 7602 South Africa
2. Faculty of Chemistry and Chemical Biology TU Dortmund University Otto-Hahn-Strasse 4a 44227 Dortmund Germany
3. Drug Discovery Hub Dortmund (DDHD) am Zentrum für Integrierte Wirkstoffforschung (ZIW) 44227 Dortmund Germany
4. Department of Chemistry Emory University 1515 Dickey Drive Atlanta GA 30322 USA