1. Department of Pharmacy, Faculty of Pharmaceutical Sciences, University of São Paulo, São Paulo, Brazil
2. Laboratory for Phytobiochemistry and Medicinal Plants Study, Department of Biochemistry, Faculty of Science, University of Yaoundé 1; P.O. Box 812, Yaoundé-Cameroon.
3. Department of Organic Chemistry, Faculty of Science, University of Yaounde 1, P.O. Box 812, Yaounde, Cameroon
4. Department of Chemistry, Higher Teacher Training College, University of Bamenda, P.O Box 39 Bambili, Cameroon
5. Department of Medical and Biomedical Engineering, Higher Technical Teachers’ Training College, University of Yaounde 1, P.O. Box 886 Ebolowa, Cameroon
6. Department of Life and Earth Sciences, Higher Teachers’ Training College, University of Maroua, P.O. Box 55 Maroua, Cameroon
7. Department of Chemistry and Materials Science Innovation & Modelling Research Focus Area, School of Physical and Chemical Sciences, Faculty of Natural and Agricultural Sciences, North-West University, Private Bag X2046, Mmabatho 2735, South Africa
8. Department of Biochemistry, Faculty of Science, University of Ngaoundere, P.O. Box. 454 Ngaoundere, Cameroon
9. South African Health Products Regulatory Authority (SAHPRA), Loftus Park, building A, Building A, 402 Kirkness St, Arcadia, 0083, Pretoria, South Africa
10. University of Buea, Faculty of Science, Department of Chemistry, Box 63 Buea, Cameroon.