Acacia catechu의 플라보노이드 성분

전통생약으로서 다양한 효능과 염색제로서 사용되어온 A. catechu의 식물화학적 성분연구를 위해 열수추출물 중 ethyl acetate 분획으로부터 9종의 flavonoid와 1종의 tannin을 단리하였으며, 이들의 물리화학적 성상과 spectral data로부터 구조를 확인한 결과 (+)-catechin (1), ()-epicatechin (2), (+)-afzelechin (3), (-)-epiafzelechin (4), (+)-mesquitol (5), kaempferol (6), quercetin (7), quercetin 3-methyl ether (8) caryatin (9) 및 ellagic acid (10)로 각각 확인 동정하였다. 이들 화합물 중 caryatin (9)은 Acacia 속으로부터 처음으로 분리되었다. Ten compounds were isolated from the ethanolic extract of the leaves of Acacia catechu (Fabaceae), and their structures were identified as nine flavonoids [(+)-catechin (1), (-)- epicatechin (2), (+)-afzelechin (3), (-)-epiafzelechin (4), (+)- mesquitol (5), kaempferol (6), quercetin (7), quercetin 3-methyl ether (8), and caryatin (9)] and an ellagic acid (10). The chemical structures of these compounds were identified on the basis of spectroscopic methods (mass spectrometry, 1D and 2D nuclear magnetic resonance) and comparison with literature values. This is the first time that the isolation of caryatin (9) has been reported from Acacia genus.