Polyoxygenated flavones from the leaves of Comptonella microcarpa

The leaves of Comptonella microcarpa have yielded one alkaloid, dictamnine, and four known polyoxygenated flavonoids, meliternatin, 3,5,8-trimethoxy-6 ,7-3',4'-dimethylenedioxyflavone, 7-(3-methylbut-2-enyloxy)-3,5,8-trimethox y-3',4'-methylenedioxyflavone (3), 7-hydroxy-3,5,8-trimethoxy-3',4'methylen edioxyflavone. In addition, two new flavonoids were found whose structures were established on the basis of their spectral data as 7-hydroxy-3,5,6,8-t etramethoxy-3',4'-methylenedioxyflavone (1) and 7-(3-methylbut-2-enyloxy)-3 ,5,6,8-tetramethoxy-3',4'-methylenedioxyflavone (2).