1. School of Chemistry and Physics, University of KwaZulu-Natal, Private Bag X01, Scottsville 3209, Pietermaritzburg, South Africa
2. Reseda Lifesciences Pvt. Ltd., 11th Main, 46th Cross, 5th Block, Jayanagar, Bangalore 560041, Karnataka, India
3. School of Pure and Applied Sciences, Mount Kenya University, P. O. Box 342-01000, Thika, Kenya
4. Department of Chemistry, Durban University of Technology, P.O. Box 1334, Durban 4000, South Africa