1. Department
of Chemistry, Federal University of Viçosa, Avenida Peter Henry Rolfs, s/n, 36570-000 Viçosa, Minas Gerais, Brazil
2. Department
of Chemistry, Universidade Federal de Minas Gerais, Avenida Presidente
Antônio Carlos, 6627, Campus Pampulha, 31270-901 Belo Horizonte, Minas
Gerais, Brazil
3. Department
of Biochemistry, School of Chemistry, National Autonomous University of Mexico, Mexico City 04510, Mexico