1. Institute of Chemistry, State University of Campinas, Campinas 13083-970, São Paulo, Brazil
2. Laboratory of Microbiology, Parasitology and Hygiene, University of Antwerp, Antwerp 2000, Belgium
3. Laboratory of Medicinal and Computational Chemistry, Physics Institute of Sao Carlos, University of Sao Paulo, Sao Carlos 13566-590, São Paulo, Brazil
4. Drugs for Neglected Diseases initiative, Geneva 1202, Switzerland