1. Department of Chemistry, Faculty of Science, Federal University Lokoja, Kogi State, Nigeria
2. Natural Products/Medicinal Chemistry Unit, Department of Chemistry, University of Ibadan, Nigeria
3. H.E.J. Research Institute of Chemistry, International Centre for Chemical and Biological Sciences (ICCBS), University of Karachi, Karachi, Pakistan
4. Department of Chemistry, Federal University of Petroleum Resources, Effurun, Delta State, Nigeria
5. Multi-Disciplinary Research Lab. Bahria University, Medical and Dental College, Karachi, Pakistan