アワダン(Melicope triphylla MERR.)のフラボノイド成分(第2報)

抄録

From the leaves of Melicope triphylla MERR., three new flavonoids (1-3) were isolated, together with nine known flavonoids, 4', 5-dihydroxy-3, 3', 7-trimethoxyflavone (4), 5-hydroxy-3, 3', 4', 7-tetramethoxyflavone (5), 3, 3', 4', 5, 7-pentamethoxyflavone (6), 7-hydroxy-3, 3', 4', 5, 8-pentamethoxyflavone (7), 3, 3', 4', 5, 7, 8-hexamethoxyflavone (8), 5-hydroxy-3, 7, 8-trimethoxy-3', 4'-methylenedioxyflavone (9), 7-hydroxy-3, 5, 8-trimethoxy-3', 4'-methylenedioxyflavone (10), 3, 5, 7, 8-tetramethoxy-3', 4'-methylenedioxyflavone (11), and 5-hydroxy-3, 6, 7, 8-tetramethoxy-3', 4'-methylenedioxyflavone (12). The structures of 1, 2, and 3 were established as 5-hydroxy-3, 7-dimethoxy-3', 4'-methylenedioxyflavone, 5-hydroxy-7-isopentenyloxy-3, 8-dimethoxy-3', 4'-methylenedioxyflavone, and 4'-hydroxy-7-isopentenyloxy-3, 3', 5, 8-tetramethoxyflavone by their respective chemical and spectral data. The 20 flavonoids isolated from this plant were examined for the piscicidal activities.