Chloranthus japonicus Sieb.,belonging to the Chloranthaceae family,is a perennial herb widely distributed in East Asia,including China,Japan and Korea.Previous phytochemical studies have revealed the presence of a var...Chloranthus japonicus Sieb.,belonging to the Chloranthaceae family,is a perennial herb widely distributed in East Asia,including China,Japan and Korea.Previous phytochemical studies have revealed the presence of a variety of secondary metabolites,such as terpenoids,phenylpropanoids and phenolic derivatives.Among them,sesquiterpenes and dimers,as the main chemical constituents and research focus in this plant,have a variety of biological activities.This review mainly focuses on the research progress of pharmacological activity of sesquiterpenes in this plant,which will lay the foundation for the development and utilization of its medicinal value in the future.展开更多
Atoms in most organic molecules are often carbon,oxygen,nitrogen,sulfur,halogens,etc. Based on the three-dimensional structure of a molecule,a molecular structural characterization（MSC） method called improved molecu...Atoms in most organic molecules are often carbon,oxygen,nitrogen,sulfur,halogens,etc. Based on the three-dimensional structure of a molecule,a molecular structural characterization（MSC） method called improved molecular electronegativity-distance vector（I-MEDV） was developed. It was used to describe the structures of 37 compounds of styrax japonicus sieb flowers. Through multiple linear regression（MLR）,a QSRR model was built up. The correlation coefficient（R1） of the model was 0.980. Then,4 vectors were selected to build another model through the method of stepwise multiple regression（SMR） ,and the correlation coefficient（R2） of the model was 0.975. Moreover,all the two models were evaluated by performing the crossvalidation with the leave-one-out（LOO） procedure and the correlation coefficients（Rcv） were 0.948 and 0.968,respectively. The results show that the I-MEDV could successfully describe the structures of organic compounds. The stability and predictability of the models were good.展开更多
计算了从野茉莉花中分离出的37种香气成分的两类分子拓扑指数(mX t v、E n),采用最佳子集回归方法建立这些拓扑指数与37种香气成分色谱保留时间(RT)的定量构效关系模型。该模型的相关系数(R2)为0.951,逐一剔除法交叉验证系数(R2cv)为0....计算了从野茉莉花中分离出的37种香气成分的两类分子拓扑指数(mX t v、E n),采用最佳子集回归方法建立这些拓扑指数与37种香气成分色谱保留时间(RT)的定量构效关系模型。该模型的相关系数(R2)为0.951,逐一剔除法交叉验证系数(R2cv)为0.920。通过R2、F、R2Adj、R2cv、VIF、FIT等检验,上述模型具有令人满意的稳健性和预测能力。展开更多
Seventeen undescribed lindenane-related sesquiterpenoid dimers,chlorajaponins A—Q(1—17),and 13 reported analogs(18—30)were isolated from Chloranthus japonicus Sieb.Compound 1 possesses an unprecedented 3/5/7/5/5/6/...Seventeen undescribed lindenane-related sesquiterpenoid dimers,chlorajaponins A—Q(1—17),and 13 reported analogs(18—30)were isolated from Chloranthus japonicus Sieb.Compound 1 possesses an unprecedented 3/5/7/5/5/6/5/3 fused octacyclic scaffold,featuring a 6(5→4)-abeo-lindenane monomer,while 2 exhibits a 3/5/6/6/5/6/5/3 fused octacyclic scaffold.Their structures were determined through a combination of spectroscopic analyses and X-ray crystallography.Compounds 1,2,and 18 demonstrated significant inhibitory effects on lipid accumulation and effectively reduced the levels of triglycerides and total cholesterol,as well as the levels of aspartate aminotransferase and alanine aminotransferase in a HepG2 cell model.In addition,compounds 1,2,and 18 significantly suppressed the protein expression of the fatty acid synthase(FASN)and the sterol regulatory element-binding protein 1(SREBP1).Moreover,the anti-inflammatory assay showed that compounds 19—22 and 25 inhibited the NO production induced by lipopolysaccharide in RAW 264.7 macrophages with IC50 values of 7.89±0.44,6.25±0.46,2.98±0.29,10.77±0.60,and 3.60±0.28μmol/L.展开更多
文摘Chloranthus japonicus Sieb.,belonging to the Chloranthaceae family,is a perennial herb widely distributed in East Asia,including China,Japan and Korea.Previous phytochemical studies have revealed the presence of a variety of secondary metabolites,such as terpenoids,phenylpropanoids and phenolic derivatives.Among them,sesquiterpenes and dimers,as the main chemical constituents and research focus in this plant,have a variety of biological activities.This review mainly focuses on the research progress of pharmacological activity of sesquiterpenes in this plant,which will lay the foundation for the development and utilization of its medicinal value in the future.
基金supported by the Youth Foundation of Education Bureau,Sichuan Province (09ZB036)Technology Bureau,Sichuan Province (2006j13-141)
文摘Atoms in most organic molecules are often carbon,oxygen,nitrogen,sulfur,halogens,etc. Based on the three-dimensional structure of a molecule,a molecular structural characterization（MSC） method called improved molecular electronegativity-distance vector（I-MEDV） was developed. It was used to describe the structures of 37 compounds of styrax japonicus sieb flowers. Through multiple linear regression（MLR）,a QSRR model was built up. The correlation coefficient（R1） of the model was 0.980. Then,4 vectors were selected to build another model through the method of stepwise multiple regression（SMR） ,and the correlation coefficient（R2） of the model was 0.975. Moreover,all the two models were evaluated by performing the crossvalidation with the leave-one-out（LOO） procedure and the correlation coefficients（Rcv） were 0.948 and 0.968,respectively. The results show that the I-MEDV could successfully describe the structures of organic compounds. The stability and predictability of the models were good.
文摘计算了从野茉莉花中分离出的37种香气成分的两类分子拓扑指数(mX t v、E n),采用最佳子集回归方法建立这些拓扑指数与37种香气成分色谱保留时间(RT)的定量构效关系模型。该模型的相关系数(R2)为0.951,逐一剔除法交叉验证系数(R2cv)为0.920。通过R2、F、R2Adj、R2cv、VIF、FIT等检验,上述模型具有令人满意的稳健性和预测能力。
基金supported by the National Natural Science Foundation of China(Nos.22177044 and 22077058)The computational resources of this work were supported by the Supercomputing Center of Lanzhou University(China).
文摘Seventeen undescribed lindenane-related sesquiterpenoid dimers,chlorajaponins A—Q(1—17),and 13 reported analogs(18—30)were isolated from Chloranthus japonicus Sieb.Compound 1 possesses an unprecedented 3/5/7/5/5/6/5/3 fused octacyclic scaffold,featuring a 6(5→4)-abeo-lindenane monomer,while 2 exhibits a 3/5/6/6/5/6/5/3 fused octacyclic scaffold.Their structures were determined through a combination of spectroscopic analyses and X-ray crystallography.Compounds 1,2,and 18 demonstrated significant inhibitory effects on lipid accumulation and effectively reduced the levels of triglycerides and total cholesterol,as well as the levels of aspartate aminotransferase and alanine aminotransferase in a HepG2 cell model.In addition,compounds 1,2,and 18 significantly suppressed the protein expression of the fatty acid synthase(FASN)and the sterol regulatory element-binding protein 1(SREBP1).Moreover,the anti-inflammatory assay showed that compounds 19—22 and 25 inhibited the NO production induced by lipopolysaccharide in RAW 264.7 macrophages with IC50 values of 7.89±0.44,6.25±0.46,2.98±0.29,10.77±0.60,and 3.60±0.28μmol/L.
