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Molecules 2010, 15(9), 6357-6364; doi:10.3390/molecules15096357
Article

Two New Flavones from Tridax procumbens Linn

1,2, 3 and 1,*
Received: 10 July 2010; in revised form: 11 August 2010 / Accepted: 13 August 2010 / Published: 9 September 2010
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Abstract: Two new flavones, 8,3′-dihydroxy-3,7,4′-trimethoxy-6-O-β-D-glucopyranosyl flavone (1) and 6,8,3′-trihydroxy-3,7,4′-trimethoxyflavone (2) were isolated from Tridax procumbens Linn., together with the four known compounds puerarin (3), esculetin (4), oleanolic acid (5) and betulinic acid (6). The structures of the two new flavones were elucidated based on chemical analysis and spectral methods (IR, 1D and 2D NMR, ESI-MS, HR-ESI-MS). The antioxidant activity of the two new flavones were evaluated by two methods, the 1,1-diphenyl-2-picrylhydrazyl (DPPH) radical scavenging activity and ferric reducing antioxidant power (FRAP) assays, and the data showed that compounds 1 and 2 have certain antioxidant activity, with the antioxidant activity of compound 2 being stronger than that of compound 1.
Keywords: Tridax procumbens Linn; 8,3′-dihydroxy-3,7,4′-trimethoxy-6-O-β-D- glucopyranosyl flavone; 6,8,3′-trihydroxy-3,7,4′-trimethoxyflavone; antioxidant activity; DPPH; FRAP Tridax procumbens Linn; 8,3′-dihydroxy-3,7,4′-trimethoxy-6-O-β-D- glucopyranosyl flavone; 6,8,3′-trihydroxy-3,7,4′-trimethoxyflavone; antioxidant activity; DPPH; FRAP
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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MDPI and ACS Style

Xu, R.; Zhang, J.; Yuan, K. Two New Flavones from Tridax procumbens Linn. Molecules 2010, 15, 6357-6364.

AMA Style

Xu R, Zhang J, Yuan K. Two New Flavones from Tridax procumbens Linn. Molecules. 2010; 15(9):6357-6364.

Chicago/Turabian Style

Xu, Runsheng; Zhang, Jing; Yuan, Ke. 2010. "Two New Flavones from Tridax procumbens Linn." Molecules 15, no. 9: 6357-6364.


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