1. REQUIMTE, Serviço de Farmacognosia and Serviço de Bromatologia, Faculdade de Farmácia, Universidade do Porto, R. Aníbal Cunha, 4050-047 Porto, Portugal; Centre for Biological and Chemical Engineering, IST, Technical University of Lisbon, Av. Rovisco Pais, P-1049-001 Lisbon, Portugal; and Research Group on Quality, Safety and Bioactivity of Plant Foods, Department of Science and Technology, CEBAS-CSIC, P.O. Box 164, E-30100 Espinardo (Murcia), Spain