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