1. a Department of Pharmacal Sciences , Harrison School of Pharmacy, Auburn University , 4306B Walker Building, Auburn , AL 36849 , USA
2. b School of Pharmaceutical Sciences, EPGL, University of Geneva, University of Lausanne , 30 Quai Ernest-Ansermet, 1211 Geneva 4 , Switzerland
3. c Center for Pharmacognostic Research on Panamanian Flora, College of Pharmacy, University of Panama , Panama City , Republic of Panama
4. d Departamento de Botánica , Universidad de Panamá , Apartado 0824-00073, Panamá , R. de Panamá