2006年5月
Antibacterial and antioxidant activities of quercetin oxidation products from yellow onion (Allium cepa) skin
JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY
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- 巻
- 54
- 号
- 10
- 開始ページ
- 3551
- 終了ページ
- 3557
- 記述言語
- 英語
- 掲載種別
- DOI
- 10.1021/jf060251c
- 出版者・発行元
- AMER CHEMICAL SOC
Four new quercetin-derived oxidation products (1-4) and lunularin-4-O-beta-D-glucoside (5) were isolated from a water extract of onion ( Allium cepa) skin, together with 17 other known compounds. Antibacterial assays for the isolated compounds showed that 2-(3,4-dihydroxyphenyl)-4,6-dihydroxy-2-methoxybenzofuran-3-one (1) presented selective activity against Helicobacter pylori strains and 3-(quercetin-8-yl)-2,3-epoxyflavanone (4) showed antibacterial activity against MRSA and H. pylori strains at the same time that it increased susceptibility of MRSA to beta-lactams. Evaluation of antioxidant activity against DPPH for the isolated compounds showed that the new derivative compounds (1-4) and 2,5,7,3,4-pentahydroxy-3,4-flavandione (6) are more active than quercetin.
- リンク情報
- ID情報
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- DOI : 10.1021/jf060251c
- ISSN : 0021-8561
- CiNii Articles ID : 30011504558
- Web of Science ID : WOS:000237590600011