1. Catalysis and Peptide Research Unit, School of Health Sciences, University of KwaZulu-Natal, University Road, Westville, Durban 4001, South Africa
2. School of Chemistry and Physics, University of KwaZulu-Natal, University Road, Westville, Durban 4001, South Africa
3. KRISP, College of Health Sciences, University of KwaZulu-Natal, Durban 4001, South Africa
4. Department of Organic Chemistry, University of Barcelona, 08028 Barcelona, Spain
5. CIBER-BBN, Networking Centre on Bioengineering, Biomaterials and Nanomedicine, Barcelona Science Park, 08028 Barcelona, Spain