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Isolation of 8-hydroxyglycitein and 6-hydroxydaidzein from soybean miso
Akira Hirota1, Miyuki Inaba, Yu-Chi Chen
1Laboratory of Applied Microbiology, School of Food and Nutritional Sciences, University of Shizuoka, Shizuoka, Japan. hirotaa@u-shizuoka-ken.ac.jp
Bioscience, Biotechnology, and Biochemistry
|June 25, 2004
Abstract:
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.
