1. Department of Pharmacy; Central University ‘Marta Abreu’; Las Villas; Cuba
2. Molecular Design and Synthesis; KULeuven; Celestijnenlaan 200f, bus 02404; B-3001; Heverlee; Belgium
3. Laboratory of Pharmacognosy and Pharmaceutica Analysis, Department of Pharmaceutical Sciences; University of Antwerp; Universiteitsplein 1; 2610; Antwerp; Belgium