1. Medicinal Plants Research Center, Federal University of Piauí, Teresina, PI, Brazil.
2. Health Care Academic Unit, Federal University of Campina Grande, Cuité, PB, Brazil.
3. Department of Chemistry, Federal University of Piauí, Teresina, PI, Brazil.
4. Department of Biochemistry and Pharmacology, Federal University of Piauí, Teresina, PI, Brazil.
5. Department of Biophysics and Physiology, Federal University of Piauí, Teresina, PI, Brazil.