Flavonoids of Cynara scolymus Possess Potent Xanthinoxidase Inhibitory Activity in vitro but are Devoid of Hypouricemic Effects in Rats after Oral Application - Sarawek, Sasiporn; Feistel, Bjoern; Pischel, Ivo; Butterweck, Veronika (Planta Medica, 2008)