1. University of the Witwatersrand, Faculty of Health Sciences, Department of Pharmacy & Pharmacology, 7 York Road, Parktown 2193, Johannesburg, South Africa
2. Department of Chemistry, Manav Rachna International University, National Capital Region, Aravali Hills, Sector-43, Faridabad, HR 121 001, India
3. University of the Witwatersrand, Faculty of Health Sciences, Department of Pharmacy & Pharmacology, 7 York Road, Parktown 2193, Johannesburg, South Africa.