风干的黄姜花(Hedychium flavum)根茎粉碎后,用工业甲醇浸泡提取。提取物水溶后用乙酸乙酯萃取,乙酸乙酯萃取部分利用柱层析和HPLC等方法进行分离,经NMR等方法鉴定后,得到4个二芳基庚烷类化合物,化合物分别为:1,7-bis(4-hydroxy-3-metho...风干的黄姜花(Hedychium flavum)根茎粉碎后,用工业甲醇浸泡提取。提取物水溶后用乙酸乙酯萃取,乙酸乙酯萃取部分利用柱层析和HPLC等方法进行分离,经NMR等方法鉴定后,得到4个二芳基庚烷类化合物,化合物分别为:1,7-bis(4-hydroxy-3-methoxyphenyl)heptane-3,5-diol (1)、5-hydroxy-1-(4’-hydroxyphenyl)-7-(4’’-hydroxy-3’’-methoxyphenyl)-3-heptanone (2)、gingerenone A (3)和coriandralpinin C (4),均为首次从黄姜花中分离得到。展开更多
水杉(Metasequoia glyptostroboides Hu et Cheng)叶风干粉碎后用甲醇提取,利用硅胶柱层析、MCI柱层析、Sephadex LH-20凝胶柱层析及HPLC等分离技术对其化学成分进行分离纯化,得到6个化合物,经波谱解析和对其理化性质进行对比,鉴定为1...水杉(Metasequoia glyptostroboides Hu et Cheng)叶风干粉碎后用甲醇提取,利用硅胶柱层析、MCI柱层析、Sephadex LH-20凝胶柱层析及HPLC等分离技术对其化学成分进行分离纯化,得到6个化合物,经波谱解析和对其理化性质进行对比,鉴定为1个降木脂素和5个木脂素,分别是salicifoliol (1)、lariciresinol 9′-benzoate (2)、(-)-hinokinin (3)、meridinol (4)、8-hydroxypluviatolide(5)和(-)-matairesinol (6)。化合物1、2、5为首次从该植物中分离得到。展开更多
20（R）-ginsenoside-Rh2,ginsenoside-Rg3 and 20（S）-ginsenoside Rg3 were prepared by the hydrolysis of leaf saponins of Panax notoginseng（Burk.）F.H.Chen with solution of 50% acetic acid and then column chromatograph...20（R）-ginsenoside-Rh2,ginsenoside-Rg3 and 20（S）-ginsenoside Rg3 were prepared by the hydrolysis of leaf saponins of Panax notoginseng（Burk.）F.H.Chen with solution of 50% acetic acid and then column chromatography on silica gel.Their structures were characterized by spectroscopic analysis,chemical degradation and comparison with authentic samples.展开更多
Plants of Schisandraceae formily are rich sources of lignans,which have been found to possess some beneficial pharmacological effects including antihepatitis,antitumor and anti HIV activities.In order to search for mo...Plants of Schisandraceae formily are rich sources of lignans,which have been found to possess some beneficial pharmacological effects including antihepatitis,antitumor and anti HIV activities.In order to search for more bioactive natural products and avoid confusion arisen from the same structures under different names by authors in the literature,the paper has reviewed 150 new lignans from plants of Schisandraceae in the literature published mainly after 1990, including dibenzocyclooctadiene,spirobenzofuranoid dibenzocyclooctadiene,4 aryltetralin,2,3 dimetheyl 1,4 diarylbutane and 2,5 diaryl tetrahydrofuran lignans.展开更多
Eight dibenzocyclooctadiene lignans were isolated from the stems of Schisandra propinqua(Wall.)Hook. f. et Thoms. Their structures were elucidated as acetylgomisin R(1), angeloylgomisin R(2), gomisins A(3), B(4), N(5)...Eight dibenzocyclooctadiene lignans were isolated from the stems of Schisandra propinqua(Wall.)Hook. f. et Thoms. Their structures were elucidated as acetylgomisin R(1), angeloylgomisin R(2), gomisins A(3), B(4), N(5) and O(6), 6 O benzoylgomosin O(7) and schisantherin A(8) by spectral studies. Among them, compound 1 was a new one, compound 2 was discovered in the genus Schisandra for the first time and the others were originally isolated from Schisandra propinqua .展开更多
文摘风干的黄姜花(Hedychium flavum)根茎粉碎后,用工业甲醇浸泡提取。提取物水溶后用乙酸乙酯萃取,乙酸乙酯萃取部分利用柱层析和HPLC等方法进行分离,经NMR等方法鉴定后,得到4个二芳基庚烷类化合物,化合物分别为:1,7-bis(4-hydroxy-3-methoxyphenyl)heptane-3,5-diol (1)、5-hydroxy-1-(4’-hydroxyphenyl)-7-(4’’-hydroxy-3’’-methoxyphenyl)-3-heptanone (2)、gingerenone A (3)和coriandralpinin C (4),均为首次从黄姜花中分离得到。
文摘20（R）-ginsenoside-Rh2,ginsenoside-Rg3 and 20（S）-ginsenoside Rg3 were prepared by the hydrolysis of leaf saponins of Panax notoginseng（Burk.）F.H.Chen with solution of 50% acetic acid and then column chromatography on silica gel.Their structures were characterized by spectroscopic analysis,chemical degradation and comparison with authentic samples.
文摘Plants of Schisandraceae formily are rich sources of lignans,which have been found to possess some beneficial pharmacological effects including antihepatitis,antitumor and anti HIV activities.In order to search for more bioactive natural products and avoid confusion arisen from the same structures under different names by authors in the literature,the paper has reviewed 150 new lignans from plants of Schisandraceae in the literature published mainly after 1990, including dibenzocyclooctadiene,spirobenzofuranoid dibenzocyclooctadiene,4 aryltetralin,2,3 dimetheyl 1,4 diarylbutane and 2,5 diaryl tetrahydrofuran lignans.
文摘Eight dibenzocyclooctadiene lignans were isolated from the stems of Schisandra propinqua(Wall.)Hook. f. et Thoms. Their structures were elucidated as acetylgomisin R(1), angeloylgomisin R(2), gomisins A(3), B(4), N(5) and O(6), 6 O benzoylgomosin O(7) and schisantherin A(8) by spectral studies. Among them, compound 1 was a new one, compound 2 was discovered in the genus Schisandra for the first time and the others were originally isolated from Schisandra propinqua .
