1. Department of Chemical and Pharmaceutical Biology Groningen Research Institute of Pharmacy Antonius Deusinglaan 1 9713 AV Groningen The Netherlands
2. PhotoGreen Lab Department of Chemistry University of Pavia viale Taramelli 12 27100 Pavia Italy
3. Present address: Flow Chemistry Group Van't Hoff Institute for Molecular Sciences (HIMS) University of Amsterdam Science Park 904 1098 XH Amsterdam The Netherlands
4. Institute of Molecular Biotechnology Graz University of Technology Petersgasse 14/1 8010 Graz Austria