Antonio Mongea)*, Ignacio Aldanaa), Maria Fonta), JosC Angel Arrasa), Esteban Santiagob), Maria JosC Lopez-Unzub), Juan JosB Martinez de Irujob), and Elena Alberdib) ... Centre of Investigation in Applied Phannacobiology, University of Navarre, 3 1080 Pamplona Spain a) Medicinal Chemistry, b, Biochemistry ... Eldiberto FemAndez-Alviirez National Centre of Organic Chemistry. Juan de la Cierva 3,28006 Madrid, Spain