Related Experiment Video
Updated: Apr 29, 2026

Preparation of Herbal Medicine: Er-Xian Decoction and Er-Xian-containing Serum for In Vivo and In Vitro Experiments
Published on: May 31, 2017
[Studies on chemical constituents from herbs of Viola yedoensis]
Jiqiu Huang1, Jingzhi Yang, Qingchun Xue
1Key Laboratory of Bioactive Substances and Resources Utilization of Chinese Herb Medicine Ministery of Education, Instituent of Materia Medica, Peking Union Medical College and Chinese Academy of Medical Sciences, Beijing 100050, China.
Objective:
To study the chemical constituents of the whole plant of Viola yedoensis.
Method:
The compounds were isolated by various chromatographic techniques and their structures were elucidated by their physicochemical properties and the analysis of their spectral data.
Result:
Seven compounds were isolated and identified as esculetin (1), isoscopoletin (2), 6-hydroxymethyl-3-pyridinol (3),5,5-bi (6,7-dihydroxycoumarin) (4), 6,6,7,7-tetrahydroxy-5,8-bicoumarin (5), loliolide (6), dehydrololiolide (7).
Conclusion:
Compounds 2-7 were isolated from V. yedoensis for the first time.
Related Concept Videos
Tonicity in Plants
Key Elements for Plant Nutrition
Pollination and Flower Structure
Aromatic Compounds: Overview
In 1825, Faraday...
Tonicity in Plants
Tonicity
Tonicity describes the capacity of a cell to lose or gain water depending on the solute...
EDTA: Chemistry and Properties

