1. National Center for Natural Products Research, School of Pharmacy; The University of Mississippi; University MS 38677 USA
2. Office of Cosmetics and Colors; Center for Food Safety and Applied Nutrition, Food and Drug Administration; 4300 River Road, College Park MD 20740 USA
3. Division of Pharmacognosy, Department of BioMolecular Sciences, School of Pharmacy; The University of Mississippi; University MS 38677 USA