1. Department
of Chemistry, Universidade Federal de São Carlos, Rod. Washington
Luís, Km 235, 13565-905 São Carlos, SP, Brazil
2. Department
of Veterinary Medicine, Universidade de São Paulo, Avenida
Duque de Caxias Norte, 225, 13635-900 Pirassununga, SP, Brazil
3. European
Research Centre for Drug Discovery and Development (NatSynDrugs) and
Department of Biotechnology, Chemistry, and Pharmacy, Università degli Studi di Siena, Via Aldo Moro 2, 53100 Siena, Italy