1. Univ Rennes Ecole Nationale Supérieure de Chimie de Rennes CNRS, ISCR UMR 6226 F-35000 Rennes France
2. DEMETA SAS 6 rue Pierre-Joseph Colin 35000 Rennes France
3. Department of Pharmaceutical and Biological Chemistry University College London (UCL) School of Pharmacy 29-39 Brunswick Square, Bloomsbury London WC1N 1AX UK
4. School of Chemistry Cardiff University Main Building, Park Place Cardiff CF10 3AT UK