1. Department of Chemistry, Institute of Exact Sciences, Federal University of Minas Gerais, Avenida Antônio Carlos, 6627, Belo Horizonte, Minas Gerais 31270-901, Brazil
2. Laboratory of Pesticides of the National Agricultural Laboratory of Minas Gerais, Avenida Rômulo Joviano, s/n, Pedro Leopoldo, Minas Gerais 33600-000, Brazil