Affiliation: | 1. Department of Chemistry , Central University of Las Villas , Santa Clara, Villa Clara, Cuba;2. Molecular Simulation and Drug Design Group, Central University of Las Villas , Santa Clara, Villa Clara, Cuba;3. REQUIMTE, Chemistry Department, Faculty of Sciences , University of Porto , Porto, Portugal aliuskamhelguera@yahoo.es;5. Molecular Simulation and Drug Design Group, Central University of Las Villas , Santa Clara, Villa Clara, Cuba;6. Consultant, 25 Elton Close , Newark, NG24 3JY, UK |