1. Department of Chemistry, Faculty of Science, Lagos State University, Lagos, Nigeria
2. Department of Chemistry, Faculty of Computer Science, Vaal University of Technology, Vanderbijlpark, South Africa
3. Foresight Institute of Research and Translation, Ibadan, Nigeria
4. Dipartimento di Farmacia, Università di Pisa, Via Bonanno 33, 56126 Pisa, Italy