1. Institute of Pharmaceutical Sciences; University of Freiburg; Albertstrasse 25 79104 Freiburg Germany
2. Science and Engineering Faculty; Queensland University of Technology; Brisbane Australia
3. Institute for Macromolecular Chemistry; University of Freiburg; Stefan-Meier-Str. 31 79104 Freiburg Germany
4. BIOSS-Centre for Biological Signalling Studies; University of Freiburg; Germany
5. BioTools, Inc.; Jupiter USA
6. Department of Chemistry; Syracuse University; Syracuse USA
7. Department of Chemistry; University of Antwerp; Belgium