| Novel flavonol glycoside, 7-O-methyl mearnsitrin, from Sageretia theezans and its antioxidant effect. | |
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MedLine Citation:
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PMID: 15264897 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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A novel flavonol glycoside, 7-O-methylmearnsitrin (7,4'-O-dimethylmyricetin 3-O-alpha-L-rhamnopyranoside), and myricetrin, kaempferol 3-O-alpha-L-rhamnopyranoside, europetin 3-O-alpha-L-rhamnoside, and 7-O-methyl quercetin 3-O-alpha-L-rhamnopyranoside were isolated from the leaves of Sageretia theezans, and their chemical structures were identified by spectroscopic analyses including two-dimensional NMR (HSQC, HMBC). Whereas myricetrin, europetin 3-O-alpha-L-rhamnoside, and 7-O-methylquercetin 3-O-alpha-L-rhamnopyranoside showed stronger activities than ascorbic acid and alpha-tocopherol, 7-O-methylmearnsitrin showed very weak antioxidant activities by ESR and LDL oxidation inhibition tests. |
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Authors:
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Shin-Kyo Chung; Young-Chan Kim; Yoshiaki Takaya; Kenji Terashima; Masatake Niwa |
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Publication Detail:
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Type: Comparative Study; Journal Article |
Journal Detail:
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Title: Journal of agricultural and food chemistry Volume: 52 ISSN: 0021-8561 ISO Abbreviation: J. Agric. Food Chem. Publication Date: 2004 Jul |
Date Detail:
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Created Date: 2004-07-21 Completed Date: 2004-09-14 Revised Date: 2006-11-15 |
Medline Journal Info:
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Nlm Unique ID: 0374755 Medline TA: J Agric Food Chem Country: United States |
Other Details:
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Languages: eng Pagination: 4664-8 Citation Subset: IM |
Copyright Information:
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Copyright 2004 American Chemical Society |
Affiliation:
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Department of Food Science and Technology, Kyungpook National University, Taegu 702-701, Korea. kchung@knu.ac.kr |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Antioxidants
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isolation & purification*,
pharmacology Electron Spin Resonance Spectroscopy Flavonoids / isolation & purification*, pharmacology Flavonols / isolation & purification*, pharmacology Lipid Peroxidation / drug effects Lipoproteins / chemistry Magnetic Resonance Spectroscopy Plant Leaves / chemistry* Rhamnaceae / chemistry* |
| Chemical | |
Reg. No./Substance:
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0/7-O-methyl mearnsitrin; 0/Antioxidants; 0/Flavonoids; 0/Flavonols; 0/Lipoproteins |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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