Extracts and Constituents of Rubus chingii with 1,1-Diphenyl-2-picrylhydrazyl (DPPH) Free Radical Scavenging Activity

doi:10.3390/ijms12063941

CNU IR > Pharmacy and Science > Dept. of Cosmetic Science and institute of cosmetic science > Periodical Articles > Item 310902800/26664

Please use this identifier to cite or link to this item: https://ir.cnu.edu.tw/handle/310902800/26664

Title:	Extracts and Constituents of Rubus chingii with 1,1-Diphenyl-2-picrylhydrazyl (DPPH) Free Radical Scavenging Activity
Authors:	Ding, Hsiou-Yu
Contributors:	化粧品科技研究所
Keywords:	antioxidant Rubus chingii 1,1-diphenyl-2-picrylhydrazyl (DPPH) rubusine
Date:	2011-06
Issue Date:	2013-06-03 15:52:46 (UTC+8)
Abstract:	The 1,1-diphenyl-2-picrylhydrazyl (DPPH) free radical scavenging activity of the fruits of Rubus chingii was studied in vitro. Ethanolic extract, ethyl acetate and n-butanol fractions from dried R. chingii fruits revealed strong DPPH free radical scavenging activity with IC50 values of 17.9, 3.4 and 4.0 µg/mL, respectively. The ethyl acetate and n-butanol fractions were further purified by a combination of silica gel chromatography, Lobar RP-8 chromatography, and high-pressure liquid chromatography (HPLC). Nine compounds were isolated, where methyl (3-hydroxy-2-oxo-2,3-dihydroindol-3-yl)-acetate (2), vanillic acid (5), kaempferol (7), and tiliroside (9) showed stronger DPPH free radical scavenging activity than that of ascorbic acid (131.8 µM) with IC50 values of 45.2, 34.9, 78.5, and 13.7 µM, respectively. In addition, rubusine (1) is a new compound discovered in the present study and methyl (3-hydroxy-2-oxo-2,3-dihydroindol-3-yl)-acetate (2), methyl dioxindole-3-acetate (3), and 2-oxo-1,2-dihydroquinoline-4-carboxylic acid (4) were isolated from the fruits for the first time.
???metadata.dc.relation.uri???:	http://dx.doi.org/10.3390/ijms12063941
Relation:	International Journal of Molecular Sciences 12(6), pp. 3941-3949
Appears in Collections:	[Dept. of Cosmetic Science and institute of cosmetic science] Periodical Articles

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