[Studies on chemical constituents from herbs of Viola yedoensis].
OBJECTIVE
To study the chemical constituents of the whole plant of Viola yedoensis.


METHODS
The compounds were isolated by various chromatographic techniques and their structures were elucidated by their physicochemical properties and the analysis of their spectral data.


RESULTS
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).


CONCLUSIONS
Compounds 2-7 were isolated from V. yedoensis for the first time.
Huang
Jiqiu
J
Key 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.
Yang
Jingzhi
J
Xue
Qingchun
Q
Yu
Lei
L
Zhang
Dongming
D
D004365:Drugs, Chinese Herbal / Q000737:chemistry*; D009930:Organic Chemicals / Q000032:analysis / Q000302:isolation & purification; D032413:Viola / Q000737:chemistry*
D004365:Drugs, Chinese Herbal; D009930:Organic Chemicals