1. Laboratory for Natural Products and Biodiscovery Research Pharmaceutical Chemistry Department Faculty of Pharmacy University of Ibadan Nigeria
2. Molecular Bio-computation and Drug Design Laboratory School of Health Sciences University of KwaZulu-Natal Westville Campus Durban 4001 South Africa
3. Department of Pharmaceutical Chemistry Dora Akunyili College of Pharmacy Igbinedion University Okada Benin City Nigeria
4. Department of Pharmacognosy University of Vienna Althanstrasse 14 A-1090 Vienna Austria