New Flavonoids from Boldoa purpurascens Cav. - Mosquera, Dulce María González; Kilonda, Amuri; Toppet, Suzanne; Compernolle, Frans; Dehaen, Wim; François, Isabelle E. J. A.; Cammue, Bruno P. A.; Apers, Sandra; Pieters, Luc; Cuéllar, Armando Cuéllar (Planta Medica, 2008)