1. Department of Chemistry, University of Cape Town, Rondebosch 7701, South Africa
2. Drug Discovery and Development Centre (H3D), University of Cape Town, Rondebosch 7701, South Africa
3. South African Medical Research Council Drug Discovery and Development Research Unit, University of Cape Town, Rondebosch 7701, South Africa
4. Institute of Infectious Disease and Molecular Medicine, University of Cape Town, Rondebosch 7701, South Africa