醉酒后少妇被疯狂内射视频,一本色道久久综合一,在线天堂新版资源www在线下载,中文字幕乱人伦高清视频,中字幕视频在线永久在线观看免费

Archive > Volume 14 Issue 2 > 2022,14(2). DOI:10.1016/j.chmed.2022.02.002 Prev Next

Original articles

Three new triterpenoid saponins from Aralia echinocaulis

  • Article
  • Figures
  • Metrics
  • Preview PDF
  • Reference
  • Related
  • Cited by
  • Materials
    摘要:


    Abstract:
    Objective: To study the active ingredients in the root bark of Aralia echinocaulis. Methods: Three triterpenoid saponins were separated from the 70% ethanol extracts and purified by column chromatography and their structures were determined by spectroscopic analysis. Compound 1 and 3 were evaluated for antioxidant activity by the in vitro DPPH free radical scavenging ability and the protective effect of OH- induced DNA oxidative damage. Results: Compound 1 was a new type of triterpenoid saponin, named as echinocaulisaglycone 3-O-β-D-glucopyranoside (echinocaulisaponin A), and it had good antioxidant activity. Compound 2 was similar to compound 1, named as 1-hydroxyl-echinocaulisaglycone 3-O-β-D-glucopyranoside (echinocaulisaponin B). Compound 3 was also a new type of triterpenoid saponin, named as echinocaulisaglycone II 3-O-α-L-arabinopyranosyl-(1”→4’)-β-D-glucopyranosiduronic acid (echinocaulisaponin C), and its antioxidant activity was weaker than compound 1. Conclusion: In this study, three new compounds were discovered and two of them were carried out in vitro anti-oxidation studies, laying the foundation for further research on the treatment of related diseases (cardiovascular disease, arthritis, age-related macular degeneration, etc.) through anti-oxidation or quenching free radical function.

    關(guān)鍵詞:


    Keywords:


    Project Supported:
    We are grateful to Ms. Ge Song, the Capital Normal University (Beijing, China) and Ms. Lifeng Han, Tianjin University of Traditional Chinese Medicine (Tianjin, China) for the measurements of NMR spectra, and the National Natural Science Foundation of China (No. 81673769) for funding the experiment.

    Clc Number:

WeChat

Mobile website