Flavonoid Constituents of Melicope triphylla MERR.

Abstract

From the leaves and the barks of Melicope triphylla MERR., three new flavonoids (6-8) were isolated, together with 4'-hydroxy-3, 3', 5, 7-tetramethoxyflavone (1), 3, 5, 7-trimethoxy-3', 4'-methylenedioxyflavone (2), 4'-hydroxy-3, 3', 5, 7, 8-pentamethoxyflavone (3), 3, 5-dimethoxy-3', 4' : 6, 7-bismethylenedioxyflavone (4) and 3, 5, 8-trimethoxy-3', 4' : 6, 7-bismethylenedioxyflavone (5). The structures of 6, 7 and 8 were established as 4'-hydroxy-7-isopentenyloxy-3, 3', 5-trimethoxyflavone, 7-isopentenyloxy-3, 3', 4', 5, 8-pentamethoxyflavone and 7-isopentenyloxy-3, 5, 8-trimethoxy-3', 4'-methylenedioxyflavone by their respective chemical and spectral data.