[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.
Graduate School of Chinese Academy of Sciences, Beijing 100039, China.
Min-Qing
MQ
Tian
Guang-Ming
GM
Bao
Nai-Yun
NY
Ji
Xiao-Ming
XM
Li
Bin-Gui
BG
Wang
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