1. Organic and Biomimetic Chemistry Research Group, Department of Organic and Macromolecular Chemistry, Ghent University, Krijgslaan 281-S4, Gent 9000, Belgium
2. Department of Biology and Chemistry, New York University, New York 10003, USA
3. Department of Structural Biology, Weizmann Institute of Science, Rehovot, Israel
4. Department of Chemistry, Life Sciences and Environmental Sustainability, University of Parma, Viale delle Scienze, 17/A, I-43124 Parma, Italy