1. Department of Chemistry, Higher Teacher Training College, TWAS Research Unit (TRU), University of Bamenda, Bamenda, Cameroon
2. Laboratory of Medicinal Chemistry & Pharmacognosy, Faculty of Science, Department of Organic Chemistry, University of Yaoundé I, Yaoundé, Cameroon
3. H. E. J. Research Institute of Chemistry, International Center for Chemical & Biological Sciences (ICCBS), University of Karachi, Karachi, Pakistan
4. Faculty of Sciences, Department of Organic Chemistry, Institute of Medical Research and Medicinal Plant Studies, TWAS Research Unit (TRU), University of Yaounde I, Yaoundé, Cameroon
5. Multidisciplinary Research Lab, Bahria University Medical and Dental College, Karachi, Pakistan
6. Max Planck Institute for Chemical Ecology, Jena, Germany