1. Laboratório de Síntese Orgânica Limpa – LASOL –Universidade Federal de Pelotas – UFPel – P.O. Box 354 96010-900 Pelotas (RS) Brazil
2. Department of Pharmaceutical Sciences –University of Perugia - Via del Liceo, 1 Perugia (PG) Italy
3. Centre of Molecular and Macromolecular StudiesPolish Academy of Sciences, Sienkiewicza 112 90-363 Łódź Poland