Three novel sesterterpenoids glasesterterpenoids A-C(1-3),featuring an unprecedented 7-cyclohexyldecahydronaphthalene carbon skeleton,were isolated from the root of Lindera glauca(L.glauca).Their structures were eluci...Three novel sesterterpenoids glasesterterpenoids A-C(1-3),featuring an unprecedented 7-cyclohexyldecahydronaphthalene carbon skeleton,were isolated from the root of Lindera glauca(L.glauca).Their structures were elucidated by quantum chemical calculations and spectroscopic methods.The biogenetic pathway for 1-3 is proposed.In the bioassay,glasesterterpenoid C exhibited DNA topoisomerase 1(Top1)inhibitory activity compared with the positive control,camptothecin.These findings represent the first examples of sesterterpenoids with a 7-cyclohexyldecahydronaphthalene carbon skeleton from the root of L.glauca.展开更多
Two new compounds, linderafurane A and linchuniinone, were isolated from the root of Lindera chunii Merr.. The structures were elucidated by spectroscopic methods, and their activities against HIV-1 integrase were eva...Two new compounds, linderafurane A and linchuniinone, were isolated from the root of Lindera chunii Merr.. The structures were elucidated by spectroscopic methods, and their activities against HIV-1 integrase were evaluated.展开更多
A new sesquiterpene lactone, strychnilactone (1), together with five known sesquiterpenoids, linderane (2), lindenenol (3), linderalactone (4), hydroxylindestenolide (5), pseudoneolinderane (6) have been isolated from...A new sesquiterpene lactone, strychnilactone (1), together with five known sesquiterpenoids, linderane (2), lindenenol (3), linderalactone (4), hydroxylindestenolide (5), pseudoneolinderane (6) have been isolated from the extracts of Supercritical Fluid Extraction of Lindera strychnifolia. The structure of the new compound was elucidated by means of spectroscopic analysis. And the relative configuration of 1 was assigned on the basis of NOE analysis.展开更多
Studies were carried out on the transesterification of the Chinese Spicehush （Lindera communis） seed （LCS） oil with methanol for the production of biodiesel. The methyl esters of LCS oil were compared with soybean...Studies were carried out on the transesterification of the Chinese Spicehush （Lindera communis） seed （LCS） oil with methanol for the production of biodiesel. The methyl esters of LCS oil were compared with soybean esters to determine biodiesel fuel performance and properties. The fatty acids content in the seed kernel oil （LKO） and coat oil （LCO） were quantified by gas chromatography and mass spectrometry method （C-C-MS）. LKO contains 95.1% saturated acids （capric, lauric, myristic and palmitic） and 2.3% unsaturated acids （oleic）. LCO contains 24.6% saturated acids （palmitic and stearic） and 73.6% unsaturated acids （oleic, linoleic and palmitoleic）. The kinematic viscosity, cold filter plugging point, cloud point, flash point and cetane index were determined. The methyl esters of LKO had a higher kinematic viscosity and a lower cold filter plugging point value, so it has better performance in cold weather. The biodiesel of LCS oil has fuel properties within the limits prescribed by American （ASTM D 6751-02） standards, except for a slightly lower flash point of LKO biodiesel than that prescribed by these standards （130℃）. Thus, LKO and LCO biodiesel have great potential to be used on a large scale as fuel for diesel engines.展开更多
One new A - type proanthocyanidin trimer, lindetannin trimer, was isolated from the stems of Lindera aggregata (Sims) Kosterm.. Its structure was elucidated by spectral and chemical methods.
Objective:To analyze the components and mechanisms of Wuyao(Linderae Radix)in treating diabetic nephropathy(DN)based on network pharmacology.Methods:Multiple online databases were used to search and screen out the act...Objective:To analyze the components and mechanisms of Wuyao(Linderae Radix)in treating diabetic nephropathy(DN)based on network pharmacology.Methods:Multiple online databases were used to search and screen out the active ingredients from Linderae Radix,the related targets of active components of Linderae Radix and the genes related to DN.Search the corresponding genes name of target through UniProt database.Cytoscape 3.2.1 was used to construct the corresponding target gene network of Linderae Radix compounds.Venn diagram was used to screen the intersection genes of the active components corresponding to the target and disease-related genes,and the intersection genes were constructed into the protein interaction relationship network.Finally,DAVID database was used to do GO function enrichment analysis and KEGG signaling pathway enrichment analysis for the intersection genes,and the results of GO and KEGG were visualized.Results:1.A total of 7 potential active ingredients and 100 target proteins were screened.2.There are a total of 34 intersection genes between the potential active ingredient target in Linderae Radix in DN.3.The top 10 of the interaction correlation between intersection proteins include:AR and NCOA2,NCOA2 and NR3C1,NCOA2 and PPARG,etc.4.There were 16 entries of molecular function,9 entries of cell component,47 entries of biological process and 18 entries of signaling pathway(P<0.05).Conclusion:DN was treated by Linderae Radix from multi-component,multi-target and multi-link synergies.展开更多
目的基于超高效液相色谱-串联四级杆/线性离子阱质谱(ultra high performance liquid chromatography tandem fourth stage rod/linear ion trap mass spectrometry,UPLC-QTRAP-MS/MS)和多元统计分析,考察和评价不同干燥方式对乌药叶成...目的基于超高效液相色谱-串联四级杆/线性离子阱质谱(ultra high performance liquid chromatography tandem fourth stage rod/linear ion trap mass spectrometry,UPLC-QTRAP-MS/MS)和多元统计分析,考察和评价不同干燥方式对乌药叶成分的影响。方法采用UPLC-QTRAP-MS/MS技术,以ACQUITY UPLC?HSS T3(100 mm×2.1 mm,1.8μm)色谱柱分离,0.1%甲酸溶液(A相)-乙腈(B相)为流动相;梯度洗脱,柱温35℃,流量0.2 mL·min-1,多反应离子监测模式同时测定乌药叶10个成分,结合方差分析、聚类热图、熵权TOPSIS和灰色关联法对不同干燥方式后乌药叶多元化学成分进行综合评价。结果10个成分在一定的浓度范围内线性良好,相关系数均>0.9916;仪器精密度、方法重复性和供试品稳定性良好,RSD均<5%;加样回收率在99.13%~103.07%,RSD值均<5%。方差分析表明不同干燥方式后乌药叶6个成分差异具有统计学意义(P<0.05);聚类热图结果显示经不同干燥方式后各成分呈明显聚集趋势;TOPSIS与灰色关联法分析结果基本一致,最终经阴凉通风摊晾干燥处理后成分保留效果最佳。结论所建立的方法准确、可靠,可为乌药叶适宜的加工方式和品质规范化生产提供参考。展开更多
基金supported by the National Natural Science Foundation of China(No.82104524)the Basic and Applied Research Program of Guangzhou City(No.2024A04J9954)。
文摘Three novel sesterterpenoids glasesterterpenoids A-C(1-3),featuring an unprecedented 7-cyclohexyldecahydronaphthalene carbon skeleton,were isolated from the root of Lindera glauca(L.glauca).Their structures were elucidated by quantum chemical calculations and spectroscopic methods.The biogenetic pathway for 1-3 is proposed.In the bioassay,glasesterterpenoid C exhibited DNA topoisomerase 1(Top1)inhibitory activity compared with the positive control,camptothecin.These findings represent the first examples of sesterterpenoids with a 7-cyclohexyldecahydronaphthalene carbon skeleton from the root of L.glauca.
文摘Two new compounds, linderafurane A and linchuniinone, were isolated from the root of Lindera chunii Merr.. The structures were elucidated by spectroscopic methods, and their activities against HIV-1 integrase were evaluated.
文摘A new sesquiterpene lactone, strychnilactone (1), together with five known sesquiterpenoids, linderane (2), lindenenol (3), linderalactone (4), hydroxylindestenolide (5), pseudoneolinderane (6) have been isolated from the extracts of Supercritical Fluid Extraction of Lindera strychnifolia. The structure of the new compound was elucidated by means of spectroscopic analysis. And the relative configuration of 1 was assigned on the basis of NOE analysis.
文摘Studies were carried out on the transesterification of the Chinese Spicehush （Lindera communis） seed （LCS） oil with methanol for the production of biodiesel. The methyl esters of LCS oil were compared with soybean esters to determine biodiesel fuel performance and properties. The fatty acids content in the seed kernel oil （LKO） and coat oil （LCO） were quantified by gas chromatography and mass spectrometry method （C-C-MS）. LKO contains 95.1% saturated acids （capric, lauric, myristic and palmitic） and 2.3% unsaturated acids （oleic）. LCO contains 24.6% saturated acids （palmitic and stearic） and 73.6% unsaturated acids （oleic, linoleic and palmitoleic）. The kinematic viscosity, cold filter plugging point, cloud point, flash point and cetane index were determined. The methyl esters of LKO had a higher kinematic viscosity and a lower cold filter plugging point value, so it has better performance in cold weather. The biodiesel of LCS oil has fuel properties within the limits prescribed by American （ASTM D 6751-02） standards, except for a slightly lower flash point of LKO biodiesel than that prescribed by these standards （130℃）. Thus, LKO and LCO biodiesel have great potential to be used on a large scale as fuel for diesel engines.
文摘One new A - type proanthocyanidin trimer, lindetannin trimer, was isolated from the stems of Lindera aggregata (Sims) Kosterm.. Its structure was elucidated by spectral and chemical methods.
基金the Natural Science Foundation of Hainan Province(No.:2019CXTD407)the National Natural Science Foundation of China(No.:81860836).
文摘Objective:To analyze the components and mechanisms of Wuyao(Linderae Radix)in treating diabetic nephropathy(DN)based on network pharmacology.Methods:Multiple online databases were used to search and screen out the active ingredients from Linderae Radix,the related targets of active components of Linderae Radix and the genes related to DN.Search the corresponding genes name of target through UniProt database.Cytoscape 3.2.1 was used to construct the corresponding target gene network of Linderae Radix compounds.Venn diagram was used to screen the intersection genes of the active components corresponding to the target and disease-related genes,and the intersection genes were constructed into the protein interaction relationship network.Finally,DAVID database was used to do GO function enrichment analysis and KEGG signaling pathway enrichment analysis for the intersection genes,and the results of GO and KEGG were visualized.Results:1.A total of 7 potential active ingredients and 100 target proteins were screened.2.There are a total of 34 intersection genes between the potential active ingredient target in Linderae Radix in DN.3.The top 10 of the interaction correlation between intersection proteins include:AR and NCOA2,NCOA2 and NR3C1,NCOA2 and PPARG,etc.4.There were 16 entries of molecular function,9 entries of cell component,47 entries of biological process and 18 entries of signaling pathway(P<0.05).Conclusion:DN was treated by Linderae Radix from multi-component,multi-target and multi-link synergies.
文摘目的基于超高效液相色谱-串联四级杆/线性离子阱质谱(ultra high performance liquid chromatography tandem fourth stage rod/linear ion trap mass spectrometry,UPLC-QTRAP-MS/MS)和多元统计分析,考察和评价不同干燥方式对乌药叶成分的影响。方法采用UPLC-QTRAP-MS/MS技术,以ACQUITY UPLC?HSS T3(100 mm×2.1 mm,1.8μm)色谱柱分离,0.1%甲酸溶液(A相)-乙腈(B相)为流动相;梯度洗脱,柱温35℃,流量0.2 mL·min-1,多反应离子监测模式同时测定乌药叶10个成分,结合方差分析、聚类热图、熵权TOPSIS和灰色关联法对不同干燥方式后乌药叶多元化学成分进行综合评价。结果10个成分在一定的浓度范围内线性良好,相关系数均>0.9916;仪器精密度、方法重复性和供试品稳定性良好,RSD均<5%;加样回收率在99.13%~103.07%,RSD值均<5%。方差分析表明不同干燥方式后乌药叶6个成分差异具有统计学意义(P<0.05);聚类热图结果显示经不同干燥方式后各成分呈明显聚集趋势;TOPSIS与灰色关联法分析结果基本一致,最终经阴凉通风摊晾干燥处理后成分保留效果最佳。结论所建立的方法准确、可靠,可为乌药叶适宜的加工方式和品质规范化生产提供参考。
