Two new secolignans （1 and 2） were isolated from the roots of Urtica mairei Levi. The structures of these two compounds were determined on the basis of extensive spectroscopic methods including HR-EI-MS, 1D and 2D N...Two new secolignans （1 and 2） were isolated from the roots of Urtica mairei Levi. The structures of these two compounds were determined on the basis of extensive spectroscopic methods including HR-EI-MS, 1D and 2D NMR experiments.展开更多
A new chromone derivative, 3-[1- (2, 4, 6-trihydroxyphenyl) 3-di-(4-hydroxyphenyl) 1-propanone-2-yl] 5,7-dihydroxy-8-di(4-hydroxyphenyl)methyl-4H-1-benzopyran-4-one, named as isomohsenone was isolated from the roots o...A new chromone derivative, 3-[1- (2, 4, 6-trihydroxyphenyl) 3-di-(4-hydroxyphenyl) 1-propanone-2-yl] 5,7-dihydroxy-8-di(4-hydroxyphenyl)methyl-4H-1-benzopyran-4-one, named as isomohsenone was isolated from the roots of Stellera chamaejasme L. together with known chamaechromone. Its structure was determined by the analysis of MS and NMR data, especially 2D NMR spectra.展开更多
From fermentation broth of soil fungus 254-2 obtained from Yunnan province, a new macrocylic trichochecene was isolated. The structure was determined on the basis of spectroscopic evidences especially the 2-D NMR spe...From fermentation broth of soil fungus 254-2 obtained from Yunnan province, a new macrocylic trichochecene was isolated. The structure was determined on the basis of spectroscopic evidences especially the 2-D NMR spectra.展开更多
Two new acetylated kaempferol glycosides were isolated from the seeds of Camellia semiserrata Chi, their structures were elucidated as kaempferol-3-O-[（3-O-acetyl）-a-L-rhamnopyranosyl（1 →3）（4-O-acetyl）-α-L-rha...Two new acetylated kaempferol glycosides were isolated from the seeds of Camellia semiserrata Chi, their structures were elucidated as kaempferol-3-O-[（3-O-acetyl）-a-L-rhamnopyranosyl（1 →3）（4-O-acetyl）-α-L-rhamnopyranosyl（1→ 6）-β-D-glucopyranoside] （1） and kaempferol-3-O-[（2-O-acetyl）-α-L-rhamnopyranosyl （1 →3）（4-O-acetyl）-α-L-rhamnopyranosyl（1 →6）-β-D- gluco-pyranoside] （2） by spectral experiments （including ESI-MS, 1D- and 2D-NMR）..展开更多
基金the NSFC project(No.30572317)research project of the Educational Department of Liaoning Province(No.2004F114)for the financial supports.
文摘Two new secolignans （1 and 2） were isolated from the roots of Urtica mairei Levi. The structures of these two compounds were determined on the basis of extensive spectroscopic methods including HR-EI-MS, 1D and 2D NMR experiments.
文摘A new chromone derivative, 3-[1- (2, 4, 6-trihydroxyphenyl) 3-di-(4-hydroxyphenyl) 1-propanone-2-yl] 5,7-dihydroxy-8-di(4-hydroxyphenyl)methyl-4H-1-benzopyran-4-one, named as isomohsenone was isolated from the roots of Stellera chamaejasme L. together with known chamaechromone. Its structure was determined by the analysis of MS and NMR data, especially 2D NMR spectra.
基金The present work was supported by Foundation of State Key Basic Research and Development Project(G1998051100),Beijing.
文摘From fermentation broth of soil fungus 254-2 obtained from Yunnan province, a new macrocylic trichochecene was isolated. The structure was determined on the basis of spectroscopic evidences especially the 2-D NMR spectra.
基金financially supported by the National Natural Science Foundation of China(No.30772714)
文摘Two new acetylated kaempferol glycosides were isolated from the seeds of Camellia semiserrata Chi, their structures were elucidated as kaempferol-3-O-[（3-O-acetyl）-a-L-rhamnopyranosyl（1 →3）（4-O-acetyl）-α-L-rhamnopyranosyl（1→ 6）-β-D-glucopyranoside] （1） and kaempferol-3-O-[（2-O-acetyl）-α-L-rhamnopyranosyl （1 →3）（4-O-acetyl）-α-L-rhamnopyranosyl（1 →6）-β-D- gluco-pyranoside] （2） by spectral experiments （including ESI-MS, 1D- and 2D-NMR）..
