1. Department of Organic Chemistry, Faculty of Pharmacy, University of Porto, 4150-047 Porto, Portugal
2. Applied Chemistry Research Center, Faculty of Chemistry and Pharmacy, Central University of ‘‘Las Villas’’, Santa Clara 54830, Cuba
3. Chemical Bioactive Center, Central University of ‘‘Las Villas’’, Santa Clara 54830, Cuba
4. REQUIMTE, Department of Chemistry, Faculty of Sciences, University of Porto, 4169-007 Porto, Portugal