1. International Centre of Insects Physiology and Ecology, P.O. Box 30772-00100 Nairobi, Kenya
2. Biodiscovery Center, Department of Chemistry, Faculty of Natural and Agricultural Sciences, University of Pretoria, Private Bag X20, Hatfield 0028, South Africa
3. Department of Chemistry, College of Science and Technology, Dr John Garang Memorial University of Science and Technology-Bor, P.O. Box 436 Juba, South Sudan
4. School of Chemistry and Material Science, The Technical University of Kenya (TUK), P.O. Box 52428-00200 Nairobi, Kenya