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자료유형
학술저널
저자정보
Saleem, Muhammad (Medicinal Chemistry Research Center, Division of Life Sciences, Korea Institute of Science and Technology) Kim, Hyoung-Ja (Medicinal Chemistry Research Center, Division of Life Sciences, Korea Institute of Science and Technolog) Jin, Changbae (Medicinal Chemistry Research Center, Division of Life Sciences, Korea Institute of Science and Technolog) Lee, Yong-Sup (Medicinal Chemistry Research Center, Division of Life Sciences, Korea Institute of Science and Technology)
저널정보
대한약학회 Archives of pharmacal research : a publication of the Pharmaceutical Society of Korea Archives of pharmacal research : a publication of the Pharmaceutical Society of Korea 제27권 제3호
발행연도
2004.1
수록면
300 - 304 (5page)

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Five caffeic acid derivatives; methyl ester of caffeoylglycolic acid (1), dimethyl ester of caffeoyltartaric acid (2), dimethyl ester of caffeoyltartronic acid (3), monomethyl ester of caffeoyltartronic acid (4), methyl ester of caffeic acid (5), and some other secondary metabolites including; quercetin, quercetin 3-O-$\beta$-D-glucuronide methyl ester, kaempferol, 3,5,7,4'-O-tetramethylkaempferol, $\beta$-sitosterol glucoside, 2$\alpha$-hydroxyursolic acid and 2,24-dihydroxyursolic acid, have been isolated and characterized. All the isolated compounds were characterized with the help of NMR spectroscopy and mass spectrometry. Structure of compound 3 was also confirmed by a single X-ray crystallographic technique. Isolates were evaluated for anti-oxidant activities and most of the tested compounds were found to be potent in DPPH free radical scavenging ($IC_{50}{\;}={\;}4.56-14.17{\;}{\mu\textrm{g}}/mL$) and superoxide anion scavenging ($IC_{50}{\;}={\;}0.58-7.39{\;}{\mu\textrm{g}}/mL$) assays.

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