1. a Unité de Molécules d'Intérêt Biologique , UFR de Pharmacie, Dijon , France
2. b Institute of Organic Chemistry , Ufa Scientific Center of the Russian Academy of Science, Ufa , Russia
3. c Department of Protein Engineering and Research , Centre d'Etude Atomique, Saclay , France
4. d UMR CNRS BioCis 8076, Faculté de Pharmacie , Châtenay-Malabry , France