1. Department of ChemistryUniversity of Namur Rue de Bruxelles 61 5000 Namur Belgium
2. State Key Laboratory of Functions and Applications of Medicinal PlantsGuizhou Medical University 3491 Baijin Road Guiyang 550014 P. R. China
3. IRIM (ex-CPBS)-UMR 9004Infectious Disease Research Institute of Montpellier (IDRIM)Université de Montpellier, CNRS 34293 Montpellier France
4. INSERMIRIM 34293 Montpellier France