1. Research Unit of Environmental and Applied Chemistry, Faculty of Science, University of Dschang, Dschang, Cameroon
2. Research Unit of Microbiology and Antimicrobial Substances, Faculty of Science, University of Dschang, Dschang, Cameroon
3. Groupe Isolement et Structure, Institut de Chimie Moléculaire de Reims (ICMR), Reims, France
4. Food Science, Department of Chemistry, Carleton University, Ottawa, ON, Canada