Isoflavanones from Uraria picta and their antimicrobial activity

5,7-Dihydroxy-2′-methoxy-3′,4′-methylenedioxyisoflavanone (2) and 4′,5-dihydroxy-2′,3′-dimethoxy-7-(5-hydroxyoxychromen-7yl)-isoflavanone (4) along with six known compounds including isoflavanones, triterpenes and steroids were isolated from the root of Uraria picta. The antimicrobial activities of these compounds were investigated.