1. Division
of Medicinal Chemistry and Pharmacognosy, College of Pharmacy, The Ohio State University, Columbus, Ohio 43210, United States
2. Department
of Pharmaceutical Chemistry and Pharmcognosy, School of Pharmacy,
College of Health Sciences, Addis Ababa University, Addis Ababa, Ethiopia
3. Department
of Chemistry and Virginia Tech Center for Drug Discovery, M/C 0212, Virginia Tech, Blacksburg, Virginia 24061, United States