1. Catalysis
and Peptide Research Unit, School of Health Sciences, University of KwaZulu-Natal, University Road, Westville, Durban 4001, South Africa
2. CIBER-BBN, Networking Centre on Bioengineering, Biomaterials and
Nanomedicine, Barcelona
Science Park, Baldiri Reixac 10, 08028 Barcelona, Spain
3. Department
of Organic Chemistry, University of Barcelona, Martí i Franqués 1-11, 08028 Barcelona, Spain
4. Department
of Chemistry, Faculty of Science, Alexandria University, P.O. Box 426, Ibrahimia, Alexandria 21321, Egypt
5. Department
of Chemistry, College of Science, King Saud University, P.O. Box 2455, Riyadh 11451, Saudi Arabia
6. School
of
Chemistry and Physics, University of KwaZulu-Natal, University Road, Westville, Durban 4001, South Africa