1. Department of Fundamental Science, Higher Technical Teachers’ Training College, University of Bamenda, Bambili, Bamenda, North West Region, Cameroon
2. Department of Chemistry, Faculty of science and Medicine, University of Fribourg, Fribourg, Switzerland
3. Department of Bioorganic Chemistry, Institute of Chemistry, University of Hohenheim, Stuttgart, Germany
4. Department of Chemistry, Higher Teachers' Training College, University of Yaoundé I, Yaoundé, Cameroon
5. Department of Biochemistry, Faculty of Science, University of Dschang, Dschang, Cameroon
6. Institute of Pharmaceutical Sciences of Western Switzerland, University of Geneva, Geneva, Switzerland
7. School of Pharmaceutical Sciences, University of Geneva, Geneva, Switzerland
8. Department of Chemistry, Faculty of science, University of Bamenda, Bambili, Bamenda, North West Region, Cameroon