1. Department
of Chemistry and Virginia Tech Center for Drug Discovery, M/C 0212, Virginia Tech, Blacksburg, Virginia 24061, United States
2. Discovery
Research, Dow AgroSciences, 9330 Zionsville Road, Indianapolis, Indiana 46268, United States
3. Department
of Biochemistry and Virginia Tech Center for Drug Discovery, M/C 0308, Virginia Tech, Blacksburg, Virginia 24061, United States
4. Missouri Botanical Garden, B.P 3391, Antananarivo 101, Madagascar
5. Centre National d’Application des Recherches Pharmaceutiques, B.P 702, Antananarivo 101, Madagascar