Phenolic Constituents in the Fruits of Cinnamomum zeylanicum and Their Antioxidant Activity
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- 作者：G. K. Jayaprakasha ; Mayumi Ohnishi-Kameyama ; Hiroshi Ono ; Mitsuru Yoshida ; and L. Jaganmohan Rao
- 刊名：Journal of Agricultural and Food Chemistry
- 出版年：2006
- 出版时间：March 8, 2006
- 年：2006
- 卷：54
- 期：5
- 页码：1672 - 1679
- 全文大小：164K
- 年卷期：v.54,no.5(March 8, 2006)
- ISSN：1520-5118
文摘
Defatted cinnamon fruit powder was successively extracted with benzene ethyl acetate, acetone,MeOH, and water. The concentrated water extract contained the maximum amount of phenolics andshowed the highest antioxidant activities. Hence, it was fractionated by Diaion HP-20SS, Diaion HP-20, and Sephadex LH-20 column chromatographies. It gave five purified compounds, the purities ofwhich were analyzed by HPLC. Compounds 1-5 were identified as 3,4-dihydroxybenzoic acid(protocatechuic acid), epicatechin-(2
ges/gifchars/beta2.gif" BORDER=0 ALIGN="middle">ges/entities/rarr.gif">O-7,4ges/gifchars/beta2.gif" BORDER=0 ALIGN="middle">ges/entities/rarr.gif">8)-epicatechin-(4ges/gifchars/beta2.gif" BORDER=0 ALIGN="middle">ges/entities/rarr.gif">8)-epicatechin (cinnamtanninB-1), 4-[2,3-dihydro-3-(hydroxymethyl)-5-(3-hydroxypropyl)-7-(methoxy)benzofuranyl]-2-methoxyphenylges/gifchars/beta2.gif" BORDER=0 ALIGN="middle">-D-glucopyranoside (urolignoside), quercetin-3-O-(6-O-ges/gifchars/alpha.gif" BORDER=0>-L-rhamnopyranosyl)-ges/gifchars/beta2.gif" BORDER=0 ALIGN="middle">-D-glucopyranoside(rutin), and quercetin-3-O-ges/gifchars/alpha.gif" BORDER=0>-L-rhamnopyranoside by using extensive spectral studies. The antioxidantactivities of purified compounds were screened for their antioxidative potential using ges/gifchars/beta2.gif" BORDER=0 ALIGN="middle">-carotene-linoleate and 1,1-diphenyl-2-picrylhydrazyl model systems. All of the compounds showed antioxidantand radical scavenging activities. This is the first report of the isolation and identification of nonvolatileconstituents and as well as antioxidant activities from cinnamon fruits.Keywords: Cinnamomum zeylanicum; fruits; phenolics; protocatechuic acid; cinnamtannin B-1;urolignoside; rutin; quercetin; antioxidant activity