1. ESS, Polytechnic of Porto, Rua Dr. António Bernardino de Almeida, 400 4200 - 072, Porto.
2. REQUIMTE/LAQV, ESS, Polytechnic of Porto, Rua Dr. António Bernardino de Almeida, 400 4200 - 072, Porto.
3. Department of Pharmaceutical Sciences, Pharmaceutical Chemistry section, Faculty of Pharmacy, IBSAL, University of Salamanca, 37007 Salamanca, Spain.
4. LAQV, REQUIMTE, Department of Chemical Sciences, Faculty of Pharmacy, University of Porto, 4050-313 Porto, Portugal.