A pair of epimers of highly-oxygenated monoterpenes were isolated from the traditional Chinese medicine Eupatorium fortunei. Their structures were elucidated on the basis of the spectral analysis as (1R*, 2S*, 3R*...A pair of epimers of highly-oxygenated monoterpenes were isolated from the traditional Chinese medicine Eupatorium fortunei. Their structures were elucidated on the basis of the spectral analysis as (1R*, 2S*, 3R*, 4R*, 6S*)-1, 2, 3, 6-tetrehydroxy-p-menthane (1) and (1S*, 2S*, 3S*, 4R*, 6R*)-1, 2, 3, 6-tetrehydroxy-p-menthane (2).展开更多
目的:研究微波法提取扶芳藤多糖的最佳工艺。方法:考察了固液比(A)、微波功率(B)、提取时间(C)、提取次数(D)4个因素的影响。结果:微波提取优化工艺条件是A1B1C3D3。即微波功率30W,固液比1∶50,提取时间14 m in,提取次数为4次,此时多糖...目的:研究微波法提取扶芳藤多糖的最佳工艺。方法:考察了固液比(A)、微波功率(B)、提取时间(C)、提取次数(D)4个因素的影响。结果:微波提取优化工艺条件是A1B1C3D3。即微波功率30W,固液比1∶50,提取时间14 m in,提取次数为4次,此时多糖提取率为10.56%。结论:微波方法可较好地应用于扶芳藤多糖的提取,同时具有提取速率快、能量消耗小等特点。展开更多
基金This work was supported by the NNSFC(No.20372029 and No.20021001-QT Program)by the Key Project of Chinese Ministry of Education(No.104178).
文摘A pair of epimers of highly-oxygenated monoterpenes were isolated from the traditional Chinese medicine Eupatorium fortunei. Their structures were elucidated on the basis of the spectral analysis as (1R*, 2S*, 3R*, 4R*, 6S*)-1, 2, 3, 6-tetrehydroxy-p-menthane (1) and (1S*, 2S*, 3S*, 4R*, 6R*)-1, 2, 3, 6-tetrehydroxy-p-menthane (2).
文摘目的:研究微波法提取扶芳藤多糖的最佳工艺。方法:考察了固液比(A)、微波功率(B)、提取时间(C)、提取次数(D)4个因素的影响。结果:微波提取优化工艺条件是A1B1C3D3。即微波功率30W,固液比1∶50,提取时间14 m in,提取次数为4次,此时多糖提取率为10.56%。结论:微波方法可较好地应用于扶芳藤多糖的提取,同时具有提取速率快、能量消耗小等特点。