1. Natural Products Institute, Faculty of Science and Technology; University of the West Indies; Mona Jamaica, West Indies
2. Department of Basic Medical Sciences, Faculty of Medical Sciences; University of the West Indies; Mona Jamaica, West Indies
3. Department of Basic Sciences, Center for Health Disparities and Molecular Medicine; Loma Linda University Health School of Medicine; Loma Linda CA 92350 USA
4. Department of Pharmaceutical and Administrative Sciences; Loma Linda University Health School of Pharmacy; Loma Linda CA 92350 USA
5. Department of Biological Sciences; Clemson University; Clemson SC 29634 USA
6. Department of Chemistry, Faculty of Science and Technology; University of the West Indies; Mona Jamaica, West Indies
7. Department of Chemistry and Biochemistry; The University of North Carolina at Greensboro; Greensboro NC 27402 USA
8. Department of Biology and Chemistry; Liberty University; Lynchburg VA 24515 USA
9. Department of Chemistry; University of California; Riverside CA 92521 USA