Aim To separate and identify chemical constituents of Ehinacea purpurea. Methods Five compounds were isolated from the plant using chromatography. Their structures were elucidated by spectroscopy. Results Five compoun...Aim To separate and identify chemical constituents of Ehinacea purpurea. Methods Five compounds were isolated from the plant using chromatography. Their structures were elucidated by spectroscopy. Results Five compounds were isolated and their structures were identified as 2, 6-dimethyl-7-octene-2, 3, 6-triol-2-O-β-D-gtucopyranoside (1), 7, 8-furocoumarin (2), 6-methoxy-7-hydroxycoumarin (3), caffeic acid (4), methyl catfeate (5), and ethyl catfeate(6). Conclusion All these compounds were obtained from the plant for the first time.展开更多
Two novel compounds, named sphaerophyside SC and SD were isolated from the ethanolic extract of the seeds of Sphaerophysa salsula. The structures of the compounds were elucidated on the basis of the NMR data, especia...Two novel compounds, named sphaerophyside SC and SD were isolated from the ethanolic extract of the seeds of Sphaerophysa salsula. The structures of the compounds were elucidated on the basis of the NMR data, especially the 2D NMR technique.展开更多
A novel cycloartane, named sphaerophysone A, 9, 19-cycloart-7b, 24b, 25-triol-1-en-3- one, was isolated from the ethanol extract of Sphaerophysa salsula DC. The structure was elucidated on the basis of spectral evide...A novel cycloartane, named sphaerophysone A, 9, 19-cycloart-7b, 24b, 25-triol-1-en-3- one, was isolated from the ethanol extract of Sphaerophysa salsula DC. The structure was elucidated on the basis of spectral evidences and confirmed by X-ray analysis, the stereochemistry of the compound was also defined by X-ray analysis.展开更多
文摘Aim To separate and identify chemical constituents of Ehinacea purpurea. Methods Five compounds were isolated from the plant using chromatography. Their structures were elucidated by spectroscopy. Results Five compounds were isolated and their structures were identified as 2, 6-dimethyl-7-octene-2, 3, 6-triol-2-O-β-D-gtucopyranoside (1), 7, 8-furocoumarin (2), 6-methoxy-7-hydroxycoumarin (3), caffeic acid (4), methyl catfeate (5), and ethyl catfeate(6). Conclusion All these compounds were obtained from the plant for the first time.
文摘Two novel compounds, named sphaerophyside SC and SD were isolated from the ethanolic extract of the seeds of Sphaerophysa salsula. The structures of the compounds were elucidated on the basis of the NMR data, especially the 2D NMR technique.
文摘A novel cycloartane, named sphaerophysone A, 9, 19-cycloart-7b, 24b, 25-triol-1-en-3- one, was isolated from the ethanol extract of Sphaerophysa salsula DC. The structure was elucidated on the basis of spectral evidences and confirmed by X-ray analysis, the stereochemistry of the compound was also defined by X-ray analysis.
