[Studies on the chemical constituents in herb of Ludwigia octovalvis].
OBJECTIVE
To study the chemical constituents of the herb of Ludwigia octovalvis.


METHODS
Chemical constituents were isolated by the repeated silica gel column chromatography, and their structures were elucidated by the physicochemical properties and spectral analysis.


RESULTS
Thirteen compounds were obtained and determined as follows: beta-sitosterol (1), oleanolic acid (2), 2alpha-hydroxy ursolic acid (3), tormentic acid (4), daucosterol (5), maltol (6), luteolin (7), quercetin (8), apigenin (9), methyl brevifolincarboxylate (10), gallic acid (11), 3, 4, 8, 9, 10-pentahydroxydibenzo[b, d]pyran-6-one (12), and ellagic acid (13).


CONCLUSIONS
Compounds 3, 4, 6-13 were isolated from the plant for the first time. And compounds 3, 4, 6, 10, 12 were obtained from the genus for the first time.
Yan
Jing
J
National Key Laboratory of Natural and Biomimetic Drugs, School of Pharmaceutical Sciences, Peking University, Beijing 100083, China.
Yang
Xiu-Wei
XW
D015394:Molecular Structure; D029594:Onagraceae / Q000737:chemistry*; D010946:Plants, Medicinal / Q000737:chemistry*; D011753:Pyrones / Q000737:chemistry* / Q000302:isolation & purification*; D014315:Triterpenes / Q000737:chemistry / Q000302:isolation & purification
C412810:2-hydroxyursolic acid; C520281:3,4,8,9,10-pentahydroxydibenzo(b,d)pyran-6-one; D011753:Pyrones; D014315:Triterpenes; C008316:maltol; C007695:euscaphic acid