1. University of Bergen, Department of Chemistry and Centre
for Pharmacy, Allégt
41, NO-5007 Bergen, Norway
2. UiT The Arctic University of Norway, Department of Chemistry, Breivika, NO-9037 Tromsø, Norway
3. Max-Planck Institute for Molecular Physiology, Department for
Chemical Biology, DE-44227 Dortmund, Germany
4. Umeå University, Department of Chemistry, S-90187, Umeå, Sweden