Abstract
Adzuki beans, the seeds of Vigna angularis Ohwi et Ohashi (Leguminosae), have been used not only as a food but also as a diuretic and anti-inflammatory folk medicine, and for treatment of dropsy, in China and Japan. In the present study we conducted phytochemical analysis of a hot-water extract of adzuki beans, and tested the radical scavenging activity of isolates from the extract. Thirteen flavonoidal derivatives were isolated and characterized, including two new compounds, and it was revealed that both the extract and the isolates have strong radical scavenging activities in the DPPH assay.
