Antioxidative activity of the flower of Torenia fournieri.

The edible flower of Torenia fournieri Linden ex E. Fourn was found to possess potent antioxidative activity in a rat brain homogenate model. Bioassay-guided isolation of the active compounds from a CH(2)Cl(2)-MeOH (1:1) extract led to the isolation of acteoside (1), luteolin-7-O-beta-glucoside (2), apigenin-7-O-alpha-rhamnosyl-(1-->6)-beta-glucoside (3), and apigetrin (4).