| Affiliation: | 1. Department of Organic Chemistry, Faculty of Science, University of Yaounde I, P.O. Box 812, Yaounde, Cameroon;2. Department of Chemistry, Faculty of Science, University of Dschang, P.O. Box 67, Dschang, Cameroon;3. Institute of Medical Research and Medicinal Plants Studies (IMPM), P.O. Box 6163, Yaounde, Cameroon;4. Department of Chemistry, Higher Teachers'' Training College, University of Yaounde I, P.O. Box 47, Yaounde, Cameroon;5. Department of Chemistry, Faculty of Science, University of Botswana, Private Bag UB00704, Gaborone, Botswana |
