1. Department of Chemistry, Faculty of Applied Sciences; Durban University of Technology; Durban 4001 South Africa
2. Department of Biotechnology and Food Technology, Faculty of Applied Sciences; Durban University of Technology; Durban 4001 South Africa
3. Department of Pharmaceutical Analysis and Quality Assurance; Omega College of Pharmacy; Edulabad, Ghatkesar Telangana 501 301 India