Hirota Akira, Inaba Miyuki, Chen Yu-Chi, Abe Naoki, Taki Shoji, Yano Masamichi, Kawaii Satoru
Laboratory of Applied Microbiology, School of Food and Nutritional Sciences, University of Shizuoka, Shizuoka, Japan.
Biosci Biotechnol Biochem. 2004 Jun;68(6):1372-4. doi: 10.1271/bbb.68.1372.
We isolated from soybean miso 8-hydroxyglycitein and 6-hydroxydaidzein as DPPH-radical scavengers, and elucidated their chemical structures by mass spectrometric, and (1)H- and (13)C-NMR spectrosopic analyses. These compounds showed DPPH-radical scavenging activity as high as that of alpha-tocopherol, 8-hydroxygenistein and 8-hydroxydaidzein. This is the first report of the isolation of 8-hydroxyglycitein from a natural source.
我们从大豆味噌中分离出8-羟基大豆黄素和6-羟基黄豆苷元作为二苯基苦味酰基自由基（DPPH）清除剂，并通过质谱分析以及氢核磁共振（¹H-NMR）和碳核磁共振（¹³C-NMR）光谱分析阐明了它们的化学结构。这些化合物表现出与α-生育酚、8-羟基异黄酮和8-羟基黄豆苷元相当的DPPH自由基清除活性。这是首次从天然来源中分离出8-羟基大豆黄素的报道。
