[Chemical contituents in leaves of Ehretia thyrsiflora].
OBJECTIVE
To investigate the chemical constituents of Ehretia thyrsiflora.


METHODS
Compounds were isolated with silica gel, Sephadex LH-20 and RP-C18 colum chromatography. Their structures were elucidated by means of physico-chemical properties and spectral analysis.


RESULTS
Six compounds were isolated and identified as beta-sitosterol (1), ethyl caffeate (2), 2-methoxyl benzoic acid octyl ester (3), tetradecenoic acid, 2,3-dihydroxypropyl ester (4), daucoster (5), allantoin (6).


CONCLUSIONS
Compounds 1-5 were obtained from this species for the first time. Compounds 2-5 were obtained from the genus Ehretia for the first time.
Li
Li
L
Key Laboratory of Bioactive Substances and Resources Utilization of Chinese Herbal Medicine, Ministry of Education, Institute of Medicinal Plant Development, Chinese Academy of Medical Science, Peking Union Medical College, Beijing 100193, China.
Shi
Renbing
R
Wu-Lan
Tana
T
Xu
Liji
L
Peng
Yong
Y
Xiao
Peigen
P
D000481:Allantoin / Q000737:chemistry; D028082:Boraginaceae / Q000737:chemistry*; D002109:Caffeic Acids / Q000737:chemistry; D009682:Magnetic Resonance Spectroscopy; D018515:Plant Leaves / Q000737:chemistry*; D012855:Sitosterols / Q000737:chemistry
D002109:Caffeic Acids; D012855:Sitosterols; D000481:Allantoin; C025473:gamma-sitosterol; C032773:ethyl caffeate