1. School of Biological Sciences, Life Sciences Building, University of Bristol, 24 Tyndall Ave, Bristol BS8 1TQ, UK
2. Celon Pharma, Warsaw, Poland
3. Institute for Organic Chemistry and BMWZ, Leibniz University of Hannover, Schneiderberg 38, 30167, Hannover, Germany
4. School of Chemistry, University of Bristol, Cantock's Close, Bristol BS8 1TS, UK