1Laboratoire de Spectroscopie Biomoleculaire, UFR de Pharmacie, Universite de Reims Champagne-Ardenne, 51096 Reims cedex, France
2Optical Spectroscopy Division, Shemyakin and Ovchinnikov Institute of Bioorganic Chemistry, Russian Academy of Sciences, 117871 Moscow, Russia
3Laboratory of Molecular Pharmacology, Developmental Therapeutics Program, Division of Cancer Treatment, National Cancer Institute, National Institute of Health, Bethesda, MD 20892, USA
4Laboratoire de Spectroscopies et Structures Biomoleculaires, Universite de Reims Champagne-Ardenne/INSERM U314, 51092 Reims Cedex, France
5Rhone-Poulenc Rorer, S.A., Departement de Biologie, 94403 Vitry sur Seine, France