1. Department of Animal Biology, University of Yaounde I, Yaounde, Cameroon
2. Department of Organic Chemistry, University of Yaounde I, Yaounde, Cameroon
3. Department of Biological Sciences, University of Ngaoundere, Ngaoundere, Cameroon
4. Department of Biochemistry, University of Bamenda, Bambili, Cameroon
5. Department of Organic Chemistry, University of Douala, Douala, Cameroon
6. Department of Animal Biology, University of Douala, Douala, Cameroon,