1. Department of Organic Chemistry, Faculty of Science, TWAS Research Unit of the University of Yaoundé I, P.O. Box 812, Yaoundé, Cameroon
2. ICCBS, International Center for Chemical and Biological Sciences, University of Karachi, 75270, Pakistan
3. Biochemistry and Biotechnology Department, Biology Faculty, Baku State University, Patamdar sohsse 40, AZ-1073, Baku, Azerbaijan
4. Higher Teacher’s Training College, University of Yaoundé I, P.O. Box 47, Yaoundé, Cameroon
5. Medical Biochemistry Research Unit, Medicinal and Aromatic Plants Research Institute, National Center for Research, P.O. Box 2404, Khartoum, Sudan
6. Department of Microbiology and Molecular Immunology, The Bloomberg School of Public Health, Johns Hopkins University, 615 N. Wolfe Street E4628, Baltimore, Maryland 21205, United States