1. Department of Chemical Sciences Olabisi Onabanjo University Ago-Iwoye P. M. B. 2002 Nigeria
2. Department of Chemistry and Polymer Science Stellenbosch University Private Bag X1 Matieland, 7602, South Africa
3. Department of Microbiology and Biochemistry University of the Free State Bloemfontein South Africa
4. School of Chemistry and Physics University of KwaZulu-Natal Private Bag X54001 Durban 4000 South Africa
5. Department of Pharmacology University of the Free State Bloemfontein 9301 South Africa
6. Department of Microbiology, Faculty of Science Olabisi Onabanjo University Ago-Iwoye, Ogun State Nigeria