[Triterpenoids and steroids from Excoecaria agallocha].
OBJECTIVE
To study the chemical constituents of Excoecaria agallocha L.


METHODS
The constituents were isolated and purified by repeated column chromatography and their structures were elucidated by spectroscopic analysis.


RESULTS
Six triterpenoids including taraxerone (1), beta-amyrin acetate (2), 3beta-[(2E,4E)-6-oxo-decadienoyloxy]-olean-12-ene (3), taraxerol (4), acetylaleuritolic acid (5), and cycloart-22-ene-3beta, 25-diol (6), and three steroids including beta-sitostenone (7), (24R)-24-ethylcholesta-4,22-dien-3-one (8), and beta-sitosterol (9) were isolated and identified from the stems and twigs of the mangrove plant E. agallocha.


CONCLUSIONS
Compounds 5-8 were isolated from E. agallocha for the first time.
Tian
Min-Qing
MQ
Graduate School of Chinese Academy of Sciences, Beijing 100039, China.
Bao
Guang-Ming
GM
Ji
Nai-Yun
NY
Li
Xiao-Ming
XM
Wang
Bin-Gui
BG
D019665:Euphorbiaceae / Q000737:chemistry*; D009682:Magnetic Resonance Spectroscopy; D009828:Oleanolic Acid / Q000031:analogs & derivatives / Q000737:chemistry / Q000302:isolation & purification; D012855:Sitosterols / Q000737:chemistry / Q000302:isolation & purification; D013256:Steroids / Q000737:chemistry* / Q000302:isolation & purification; D014315:Triterpenes / Q000737:chemistry* / Q000302:isolation & purification
D012855:Sitosterols; D013256:Steroids; D014315:Triterpenes; C014947:acetylaleuritolic acid; C025473:gamma-sitosterol; D009828:Oleanolic Acid; C005802:taraxerol; C000265:beta-amyrin acetate