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Antibacterial and Antioxidant Activities of Quercetin Oxidation Products from Yellow Onion (Allium cepa) Skin

Ramos, Freddy A., Takaishi, Yoshihisa, Shirotori, Miki, Kawaguchi, Yousuke, Tsuchiya, Koichiro, Shibata, Hirofumi, Higuti, Tomihiko, Tadokoro, Tetsuo, Takeuchi, Minoru·2006·Journal of Agricultural and Food Chemistry

Abstract

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.

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Metadata

Authors
Ramos, F. A., Takaishi, Y., Shirotori, M., Kawaguchi, Y., Tsuchiya, K., Shibata, H., Higuti, T., Tadokoro, T., & Takeuchi, M.
Venue
Journal of Agricultural and Food Chemistry
Published
2006-04-21
Volume
54
Issue
10
Pages
3551-3557
ISSN
  • 0021-8561 (ISSN-L)
  • 1520-5118
OpenAlex
W1992967507
Cited by
252
References
0
FWCI
6.58
Type
journal article
Language
en
Open access
closed

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CoChat. (2026). Citation check: Antibacterial and Antioxidant Activities of Quercetin Oxidation Products from Yellow Onion (Allium cepa) Skin. https://app.cochat.ai/papers/10.1021/jf060251c
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Ramos, F. A., Takaishi, Y., Shirotori, M., Kawaguchi, Y., Tsuchiya, K., Shibata, H., Higuti, T., Tadokoro, T., & Takeuchi, M. (2006). Antibacterial and Antioxidant Activities of Quercetin Oxidation Products from Yellow Onion (Allium cepa) Skin. Journal of Agricultural and Food Chemistry. https://doi.org/10.1021/jf060251c

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