Flavonoids with anti-cataract activity from Brickellia arguta.

Six flavonoids were isolated from Brickellia arguta and identified using chemical and spectral methods. The isolation and spectral data of a new flavonoid, 6- methoxykaempferol 3-O-beta-D- robinobioside (3), are reported for the first time. Three of these flavonoids were tested and showed inhibition of rat lens aldose reductase.