A New Flavone C-Glycoside from Clematis rehderiana
AbstractA new flavone C-glycoside, isovitexin 6″-O-E-p-coumarate (1) and two known flavonoid glycosides—quercetin 3-O-β-D-glucuronopyranoside (2) and isoorientin (3)—were isolated from an ethanol extract of aerial parts of Clematis rehderiana. Their structures were determined by spectroscopic methods. The antioxidant effects of the two flavone C-glycosides were evaluated by both the MTT and DPPH assays. Compound 1 showed potent activities against H2O2-induced impairment in PC12 cells within the concentration range tested, whereas compound 3 scavenged DPPH radical strongly, with an IC50 value of 13.5 μM.
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Du, Z.-Z.; Yang, X.-W.; Han, H.; Cai, X.-H.; Luo, X.-D. A New Flavone C-Glycoside from Clematis rehderiana. Molecules 2010, 15, 672-679.
Du Z-Z, Yang X-W, Han H, Cai X-H, Luo X-D. A New Flavone C-Glycoside from Clematis rehderiana. Molecules. 2010; 15(2):672-679.Chicago/Turabian Style
Du, Zhi-Zhi; Yang, Xian-Wen; Han, Hao; Cai, Xiang-Hai; Luo, Xiao-Dong. 2010. "A New Flavone C-Glycoside from Clematis rehderiana." Molecules 15, no. 2: 672-679.