1. LASOL-CCQFA; Universidade Federal de Pelotas - UFPel; P.O. Box 354 96010-900 Pelotas, RS Brazil
2. Department of Chemistry; Universidade Federal de Santa Catarina - UFSC; Florianópolis, SC Brazil
3. Laboratory of Biotechnology of Natural and Synthetic Products; Universidade de Caxias do Sul - UCS; Caxias do Sul, RS Brazil.