1. IBMM, Université de Montpellier, CNRS, ENSCM, 1919 route de Mende, 34095 Montpellier, France
2. Institute of Organic Chemistry and Biochemistry, Czech Academy of Sciences, Prague 166 10, Czech Republic
3. Université de Lorraine and CNRS, UMR 7019 LPCT, F-54000 Nancy, France
4. Université Paris Cité and CNRS, ITODYS, F-75006 Paris, France