1. Department of Chemistry, Faculty of Science, University of Ngaoundéré, Ngaoundéré, Cameroon
2. Laboratoire BONHEURS-EA 751, CY Cergy-Paris Université, Gennevilliers, France
3. Department of Organic Chemistry, Faculty of Science, University of Yaoundé 1, Yaoundé, Cameroon
4. Faculty of Science, University of Dschang, Dschang, Cameroon
5. Department of General, Organic and Biomedical Chemistry, University of Mons, Mons, Belgium