1. Department
of Pharmacology and Toxicology, College of Medicine, University of Arkansas for Medical Sciences, Little Rock, Arkansas 72205, United States
2. Cowell Biologics Consulting, Holly Springs, North Carolina 27540, United States
3. Department
of Chemistry and Biochemistry, University of Arkansas, Fayetteville, Arkansas 72701, United States
4. Center
for Drug Discovery, Research Triangle Institute, P.O. Box 12194, Research Triangle Park, North Carolina 27709, United States