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Molecules 2012, 17(5), 5459-5466; doi:10.3390/molecules17055459

Isolation and Characterization of Phenolic Antioxidants from Plantago Herb

College of Pharmaceutical Sciences, Matsuyama University, 4-2 Bunkyo-cho, Matsuyama, Ehime 790-8578, Japan
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Author to whom correspondence should be addressed.
Received: 12 April 2012 / Revised: 2 May 2012 / Accepted: 4 May 2012 / Published: 9 May 2012
(This article belongs to the Section Natural Products)
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Abstract

Seven phenolic compounds, including a new phenylethanoid glycoside, were isolated from the ethyl acetate fraction of an aqueous ethanol extract of Plantago Herb (whole part of Plantago asiatica L.), which showed significant antioxidative activity. The new compound was characterized as 2-(3,4-dihydroxyphenyl)ethyl 3-O-β-D-allopyranosyl-6-O-caffeoyl-β-D-glucopyranoside on the basis of spectral and chemical evidence, and its antioxidant activity was comparable to that of tea catechins.
Keywords: Plantago asiatica; Plantaginaceae; phenylethanoid glycoside; antioxidant; oxygen radical absorbance capacity (ORAC) Plantago asiatica; Plantaginaceae; phenylethanoid glycoside; antioxidant; oxygen radical absorbance capacity (ORAC)
This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).

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MDPI and ACS Style

Amakura, Y.; Yoshimura, A.; Yoshimura, M.; Yoshida, T. Isolation and Characterization of Phenolic Antioxidants from Plantago Herb. Molecules 2012, 17, 5459-5466.

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