1. Department of Chemistry, University of Douala, Faculty of Science, P.O. Box 24157 Douala, Cameroon, Organic and Bioorganic Chemistry, Department of Chemistry, Bielefeld University, 33501 Bielefeld, Germany, Dr. Panjwani Center for Molecular Medicine and Drug Research, University of Karachi, Karachi-75270, Pakistan, Department of Organic Chemistry, University of Yaoundé I, Faculty of Science, P.O. Box 812 Yaoundé, Cameroon, Laboratoire Pharmacognosie UMR-8638, Université Paris Descartes, Faculté des...