1. Department of Chemistry; Covenant University, CST, Canaanland; Km 10 Idiroko Road, P.M.B. 1023 Ota Ogun State Nigeria
2. Department of Chemistry; University of Pretoria, Private Bag X20; Hatfield 0028 South Africa
3. Department of Biological Sciences; Covenant University, CST, Canaanland; Km 10 Idiroko Road, P.M.B. 1023 Ota Ogun State Nigeria