1. Research Group on Natural Products Center for Research in Sciences and Technology University of Franca Avenida Dr. Armando Salles of Oliveira 201 CEP 14404-600 Franca, SP Brazil
2. Center for Discovery and Innovation in Parasitic Diseases Skaggs School of Pharmacy and Pharmaceutical Sciences University of California San Diego 9500 Gilman Drive La Jolla CA 92093 USA
3. School of Pharmaceutical Sciences of Ribeirão Preto University of São Paulo Av. do Café, s/n CEP 14.040-903 Ribeirão Preto, SP Brazil