Two New Flavones from Tridax procumbens Linn

Molecules

Runsheng Xu¹  Jing Zhang¹ 

[1] ¹Nurturing Station for the State Key Laboratory of Subtropical Silviculture, Zhejiang Agriculture and Forestry University, Linan 311300, China ²College of Chemistry and Life Science, Zhejiang Normal University, Jinhua 321004, China ³College of Pharmacy, Henan University of Traditional Chinese Medicine, Zhengzhou 450008, China

关键词: 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;   

DOI  :  10.3390/molecules15096357

来源: mdpi

【 摘 要 】

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.

【 授权许可】

CC BY   
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