1. Laboratoire de Pharmacologie Antitumorale du Centre Oscar Lambret and INSERM U-524, IRCL, Lille 59045, France, Department of Biochemistry, University of Mississippi Medical Center, Jackson, Mississippi 39216, Laboratoire de Chimie Macromoléculaire et Chimie Physique, Université de Liège, Liège 4000, Belgium, and Banyu Tsukuba Research Institute, Okubo, Tsukuba, Japan