1. Department of Pharmaceutical Sciences School of Pharmaceutical Sciences of Ribeirão Preto University of São Paulo Av. do Café, s/n 14040-903 Ribeirão Preto, SP Brazil
2. Laboratory of Nuclear Magnetic Resonance Chemistry Department Federal University of São Carlos São Carlos 13565-905, SP Brazil
3. Nucleus of Research in Sciences and Technology University of Franca Franca 14404-600, SP Brazil