1. Department of Chemistry, University College London, 20, Gordon Street, London WC1H 0AJ, UK
2. School of Cancer and Pharmaceutical Sciences, King's College London, London, SE1 1UL, UK
3. UCL Cancer Institute, Paul O'Gorman Building, University College London, London WC1E 6DD, UK
4. Centre for Radiopharmaceutical Chemistry, Kathleen Lonsdale Building, 5 Gower Place, London WC1E 6BS, UK
5. Centre for Advanced Biomedical Imaging, Paul O'Gorman Building, University College London, London WC1E 6DD, UK