Isolation of a New Metabolite from Biotransformation of Daidzein by Aspergillus oryzae

Yu-Chi CHEN; Yasumasa SUGIYAMA; Akira HIROTA

doi:10.1271/bbb.90168

Bioscience, Biotechnology, and Biochemistry

Online ISSN : 1347-6947
Print ISSN : 0916-8451

Food & Nutrition Science Notes

Isolation of a New Metabolite from Biotransformation of Daidzein by Aspergillus oryzae

Yu-Chi CHEN, Yasumasa SUGIYAMA, Akira HIROTA

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Keywords: daidzein, biotransformation, Aspergillus oryzae

JOURNAL FREE ACCESS

2009 Volume 73 Issue 8 Pages 1877-1879

DOI https://doi.org/10.1271/bbb.90168

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Abstract

Two compounds were isolated from biotransformation of daidzein, a soybean isoflavone, by Aspergillus oryzae. One was 6,7,8,4′-tetrahydroxyisoflavone, an A-ring dihydroxylated daidzein, and the other was a novel compound which had the cleaved B-ring of daidzein. The former was perhaps derived from 8-hydroxydaidzein and/or 6-hydroxydaidzein, and had high DPPH radical-scavenging activity.

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