[Chemical study on ethyl acetate portion of Ehretia thyrsiflora, boraginaceae species of Kudingcha].
OBJECTIVE
To investigate the chemical constituents of Ehretia thyrsiflora.


METHODS
Compounds were isolated by using silica gel, Sephadex LH-20 and RP-C18 chromatography; their structures were elucidated by means of spectral data analysis.


RESULTS
Seven compounds were isolated and identified as methyl rosmarinate (1), caffeic acid (2), quercetin (3), kampferol (4), kaempferol 3-O-alpha-D-arabinoside (5), quercetin 3-O-alpha-D-arabinoside (6), and p-hydroxy benzoic acid (7).


CONCLUSIONS
All these compounds were isolated from E. thyrsiflora for the first time. Compounds 2-7 were isolated from genus Ehretia for the first time.
Li
Li
L
Institute of Medicinal Plant Development, Chinese Academy of Medical Sciences, Beijing 100094, China.
Xu
Li-jia
LJ
He
Zhen-dan
ZD
Yang
Qin-qiong
QQ
Peng
Yong
Y
Xiao
Pei-gen
PG
D000085:Acetates / Q000032:analysis*; D028082:Boraginaceae / Q000737:chemistry*; D004365:Drugs, Chinese Herbal / Q000737:chemistry*
D000085:Acetates; D004365:Drugs, Chinese Herbal; C007650:ethyl acetate