Taraxastane-type triterpenes from the aerial roots of Ficus microcarpa

Seven new taraxastane-type triterpenes-20-taraxastene-3beta, 22alpha-diol (1), 3beta-acetoxy-20-taraxasten-22alpha-ol (2), 3beta-acetoxy-22alpha-methoxy-20-taraxastene (3), 3beta-acetoxy-20alpha,21alpha-epoxytaraxastan-22alp ha-ol (4), 3beta-acetoxy-19alpha-methoxy-20-taraxastene (5), 3beta-acetoxy-19alpha-hydroperoxy-20-taraxastene (6), 3beta-acetoxy-20alpha,21alpha-epoxytaraxastane (7)-were isolated from the aerial roots of Ficus microcarpa. Their structures were elucidated by spectroscopic and chemical methods.     

New peroxy triterpenes from the aerial roots of Ficus microcarpa

Six new triterpenes, 3 beta-acetoxy-12 beta,13 beta-epoxy-11 alpha-hydroperoxyursane (1), 3 beta-acetoxy-11 alpha-hydroperoxy-13 alpha H-ursan-12-one (2), 3 beta-acetoxy-1 beta,11 alpha-epidioxy-12-ursene (3), (20S)-3 beta-acetoxylupan-29-oic acid (4), (20S)-3 beta-acetoxy-20-hydroperoxy-30-norlupane (5), and 3 beta-acetoxy-18 alpha-hydroperoxy-12-oleanen-11-one (6), together with 3 beta-acetoxy-12-oleanen-11-one (7), were isolated from the aerial roots of Ficus microcarpa. Compounds 1-3, 5, and 6 were characterized as new peroxytriterpenes. The structures of 3 and 6 were confirmed by X-ray crystallography, and their structures were elucidated by spectroscopic and chemical methods.     

东紫苏根中的5种酚性成分

目的研究东紫苏根的化学成分。方法采用硅胶柱色谱及薄层色谱法进行分离纯化,根据波谱方法及理化性质进行结构鉴定。结果从其根的乙醇提取物中分离得到5种酚性成分,其结构分别为3-羟基-4′,5-二甲氧基二苄基-4-O-β-D-吡喃木糖基-(1→6)-β-D-吡喃葡萄糖苷(Ⅰ)、没食子酸(Ⅱ)、( )-儿茶素(Ⅲ)、香草醛(Ⅳ)、山柰酚(Ⅴ)。结论化合物为新化合物,命名为东紫苏苷C。     

五指毛桃的化学成分研究

利用各种色谱方法从五指毛桃中分离得到了17个化合物,根据理化常数和波谱数据鉴定了化合物的结构,分别为cyclomorusin(1),quercetin 3-O- -(1→2)-β-D-glucopyranoside(2),3,5,4'-三羟基-6,7,3'-三甲氧基黄酮(3),槲皮素(4),小麦黄素(5),金合欢素(6),木犀草素(7),芹菜素(8),(E)-suberenol(9),meranzin hydrate(10),丁香酚甲醚(11),3-甲氧基-4-羟基苯甲酸(12),对羟基苯甲酸(13),绿原酸甲酯(14),大黄素(15),α-香树素乙酸酯(16),β-谷甾醇(17)。其中化合物1~6,9~15为首次从该植物中分离得到。     

榕须化学成分研究

目的:对榕须的化学成分进行研究.方法:采用硅胶柱色谱及凝胶色谱等方法进行分离纯化,并利用理化常数和波谱数据鉴定化合物结构.结果:从榕须甲醇提取物的石油醚和醋酸乙酯萃取部位分离获得8个化合物,其中包括1个神经酰胺类化合物和3个三萜类化合物,分别为(2S,3S,4R)-2-[(2'R).2'-羟基-二十五碳酰胺]-十七碳-1,3,4.三醇[(2S,3S,4R)-2-[(2'R)-2'-bydroxypentracosanoylamino]-heptadecane-1,3,4.triol,1],12,20(30)-乌苏二烯-3α-醇[12,20(30)-ursa-dien-3α-ol,2]、表木栓醇(epifriedelanol,3)、α-香树醇乙酸酯(α-amyfin acetate,4)、β-谷甾醇(β-sitosterol,5)、β-胡萝卜苷(β-daucosterol,6)、二十六烷酸(hexacosanoic acid,7)和二十二烷酸(docosanoic acid,8).结论:化合物1为新化合物,命名为榕树酰胺A;化合物2为首次从该植物中分离得到.     

A new saikogenin from the roots of Bupleurum bicaule

AIM： To study the chemical constituents from the roots of Bupleurum bicaule Helm （Apiaceae）. METHOD： Silica gel, Sephadex LH-20, MPLC Rp-C18 column chromatography, and HPLC were used for isolation of compounds. The structures were elucidated on the basis of 1D- and 2D-NMR technology and HRESI-MS. Compounds were evaluated in vitro for their inhibitory ability against the proliferation of rat mesangial cells by the MTT method. RESULTS： Twelve compounds were isolated, and their structures were identified on the basis of their spectroscopic and physico-chemical properties as 13, 28-epoxy-olean-11-en-3-one （1）, saikogenin E （2）, saikogenin G （3）, 11α-methoxy-3β, 16β, 23, 28-tetrahydroxyolean-12-ene （4）, saikogenin D （5）, prosaikogenin F （6）, prosaikogenin A （7）, prosaikogenin G （8）, prosaikogenin D （9）, laccaic acid （10）, methyl gallate （11）, and ethyl gallate （12）. Compounds 1, 2, 7, 8, and 10 were observed to have inhibitory activity against mesangial cell proliferationin to different degrees. CONCLUSION： Compound 1, 8, and 10 exhibit significant inhibitory effects on rat mesangial cell proliferation induced by Ang II.     

Five new diterpenoids from Pseudolarix kaempferi

Five new diterpenoids, pseudolaric acids F (1), G (2), and H (3), 2',3'-dihydroxy-1'-propoxypseudolarate B (4), and 6'-O-acetylpseudolaric acid B O-beta-D-glucopyranoside (5), along with nine known diterpenoids, pseudolaric acids A, B, and C(1), deacetylpseudolaric acid C(2), deacetylpseudolaric acid A, methyl pseudolarate A, methyl pseudolarate B, pseudolaric acid A-O-beta-D-glucopyranoside, and pseudolaric acid B-O-beta-D-glucopyranoside, were isolated from the root bark of Pseudolarix kaempferi. Their structures and stereochemistry were elucidated mainly by spectral data, especially 2D NMR techniques.     

Five new homoisoflavonoids from the tuber of Ophiopogon japonicus

Five new homoisoflavonoids, ophiopogonanone C (1), ophiopogonanone D (2), ophiopogonone C (3), ophiopogonanone E (4) and ophiopogonanone F (5), and six known compounds were isolated from an ethanol extract of the tubers of Ophiopogon japonicus (Thunb) Ker-Gawl. Spectroscopic analyses were used to elucidate the structures of these compounds.     

Five new alkaloids from the leaves of Remijia peruviana

Three new indolylquinuclidine-type alkaloids, remijinine (1), epiremijinine (2), and 5-acetyl-apocinchonamine (3), and two new cinchonine-derived alkaloids, N-acetyl-deoxycinchonicinol (4) and N-acetyl-cinchonicinol (5), as well as the known alkaloids quinamine, conquinamine, cinchonine, and quinidine were isolated from the leaves of Remijia peruviana. The structures of the new alkaloids were elucidated on the basis of spectroscopic analysis, including homonuclear and heteronuclear correlation NMR experiments (COSY, ROESY, HMQC, and HMBC). The relative configuration at C-7 for remijinine (1) and, in consequence, for epiremijinine (2) was established by X-ray crystal structure analysis of the former.     

A new quinoline alkaloid from the roots of Dictamnus angustifolius

AIM： To investigate the quinoline alkaloids from the roots ofDictamnus angustifolius G.Don ex Sweet （Rutaceae）. METHOD： The quinoline alkaloids were isolated by various column chromatographic methods and their structures were eluci- dated on the basis of spectral analysis. RESULTS： A new quinoline alkaloid, 5-methoxylrobustine （1）, along with five known quinoline alkaloids were obtained, and their structures were identified as dictamnine （2）, robustine （3）, isopteleine （4）, 7-fagarine （5）, and skimmianine （6）. Cytotoxicity testing of these alkaloids showed that all of them had weak cytotoxic activities against human breast cancer cells （MCF7）. CONCLUSION： Compound 1 is a new quinoline alkaloid. Alkaloid 3 showed stronger anti-proliferation effect than the other al- kaloids.     

岗梅根中一个新的三萜皂苷(英文)

目的:研究岗梅根的化学成分。方法:采用硅胶、反相硅胶、Sephadex LH-20等柱色谱法对岗梅根的化学成分进行分离纯化,应用谱学技术和化学方法鉴定化合物的结构。结果:从岗梅根中分离并鉴定了4个三萜苷类化合物:(3β)-19-hydroxy-28-oxours-12-en-3-yl β-D-glucopyranosiduronic acid n-butyl ester(1),ilexasoside A(2),Monepaloside F(3)和ilexoside A(4)。结论:化合物1为新化合物,化合物3和4为首次从该植物中分离得到。     

Four new triterpenoid saponins from the roots of Bupleurum rigidum

Five triterpenoid saponins [buddlejasaponin IV, sandrosaponins VII (1), VIII (2), IX (3), and X (4)] were isolated from an n-BuOH extract of the roots of Bupleurum rigidum. Sandrosaponins VII-X (1-4) are new compounds, and their structures were established by 1D and 2D NMR techniques, FABMS, and chemical methods.     

Three new sesquiterpenes from roots of Curcuma longa

Objective: To study the chemical constituents from the roots of Curcuma longa.Methods: The structures of the new compounds were elucidated based on extensive spectral analysis, including 1D and 2D NMR, MS, UV, and CD analysis.Results: Two new sesquiterpene compounds (1S,2R,5R,7S,8R)-2,8-epoxy-5-hydroxybisabola-3,10-dioen-9-one (1), (1R,2R,5R,7S,8R)-2,8-epoxy-5-hydroxybisabola-3,10-dioen-9-one (2), and a new natural product 6-(4-Hydroxymethylphenyl)-2-methyl-hept-2-ene-4-one (3) together with three known compounds ar-turmerone (4), 2-methyl-6-(4-hydroxyphenyl-3-methyl)-2-hepten-4-one (5) and 2-methyl-6-(4-hydroxyphenyl)-2-hepten-4-one (6) were isolated from C. longa root extract with 95% ethanol.Conclusion: In the study, three new compounds were isolated from C. longa, and their absolute configurations were determined.     

两面针中的两个新生物碱

目的研究两面针Zanthoxylumnitidum的化学成分。方法采用正反相硅胶柱色谱法进行分离纯化,利用MS、UV、IR、NMR等波谱数据及理化性质鉴定化合物的结构。结果分离得到2个新苯并啡啶类生物碱,分别鉴定为1,3-二(8-双氢两面针碱)丙酮[1,3-bis(8-dihydronitidinyl)-acetone,1]和8-丙酮基双氢崖椒定碱(8-aceto-nyldihydrofagaridine,2)。结论化合物1和2均为未见报道的新化合物,分别命名为两面针酮A(nitidumtone A,1)和两面针酮B(nitidumtone B,2)。     

星点设计-效应面法优化白茅根总酚酸提取工艺

目的 优化白茅根总酚酸的提取工艺.方法 采用超声波辅助提取法,选取提取试剂浓度、提取时间、提取温度和料液比作单因素试验,在此基础上采用星点设计考察提取试剂浓度、提取时间及提取温度3因素对提取工艺的影响,对结果进行二项式方程拟合,效应面法筛选最佳条件并进行预测分析.结果 得到的最佳提取工艺条件为乙醇浓度为40％,提取时问38 min,提取温度为33℃,料液比为1:40,总酚酸质量分数的预测值为2.71 mg/g.验证实验的总酚酸质量分数为2.46mg/g,与预测值接近.结论 说明模型可靠.该工艺步骤简单,稳定可行.     

Five new labdane diterpenes from Aster oharai

Five new labdane diterpenes (1-5) together with seven known diterpenes have been isolated from a methanol extract of the aerial parts of Aster oharai. Five new structures were determined as 7alpha-hydroperoxylabda-8(17),14-dien-13(R)-ol-4-O-acetyl-alpha-L-6-deoxyidopyranoside (1), 7alpha-hydroperoxylabda-8,14-dien-13(R)-ol-4-O-acetyl-alpha-L-6-deoxyidopyranoside (2), labda-7,14-dien-13(R)-ol-4-O-acetyl-alpha-L-rhamnopyranoside (3), labda-7,14-dien-13(R)-ol-3-O-acetyl-alpha-L-rhamnopyranoside (4), and labda-7,14-dien-13(R)-ol-2-O-acetyl-alpha-L-rhamnopyranoside (5), on the basis of spectroscopic methods. Compound 1 showed moderate cytotoxicity against four cultured human tumor cell lines with ED(50) values ranging from 1.1 to 7.7 microg/mL.     

Five new iboga alkaloids from Tabernaemontana corymbosa

Five new indole alkaloids of the ibogan type (1-5), in addition to 12 other known iboga alkaloids, were obtained from the leaf and stem-bark extract of the Malayan species Tabernaemontana corymbosa, viz., 19(S)-hydroxyibogamine (1), 19-epi-isovoacristine (2), isovoacryptine (3), 3R/S-ethoxyheyneanine (4), and 3R/S-ethoxy-19-epi-heyneanine (5). The structures were determined using NMR and MS analysis and comparison with known related compounds.     

Five new insecticidal sesquiterpenoids from Celastrus angulatus

Five new sesquiterpene polyol esters were isolated from the root bark of Celastrus angulatus by bioassay-guided fractionation. Their structures were determined by spectral data interpretation as 1alpha,2alpha,6beta,8beta,13-pentaacetoxy-9beta-benzoyloxy-4beta-hydroxy-beta-dihydroagarofuran (1), 1alpha,2alpha,6beta-triacetoxy-8alpha-(beta-furancarbonyloxy)-9beta-benzoyloxy-13-isobutanoyloxy-4beta-hydroxy-beta-dihydroagarofuran (2), 1alpha,2alpha,6beta-triacetoxy-8beta-isobutanoyloxy-9beta-(beta-furancarbonyloxy)-13-(alpha-methyl)butanoyloxy-4beta-hydroxy-beta-dihydroagarofuran (3), 1alpha,2alpha,6beta-triacetoxy-8alpha,13-diisobutanoyloxy-9beta-benzoyloxy-4beta-hydroxy-beta-dihydroagarofuran (4), and 1alpha,2alpha,6beta-triacetoxy-8alpha-isobutanoyloxy-9beta-benzoyloxy-13-(alpha-methyl)butanoyloxy-4beta-hydroxy-beta-dihydroagarofuran (5). Compounds 1-5 exhibited insecticidal activity against the larval of Mythimna separata.     

Five new Ocotillone-type saponins from Gynostemma pentaphyllum

Five new ocotillone-type saponins, gynosides A-E (1-5), along with 10 known dammarane-type saponins, were isolated from the aerial parts of Gynostemma pentaphyllum. The structures of these new compounds were determined by NMR analysis and acid hydrolysis. The structure and stereochemistry of gynoside A (1) were confirmed by X-ray crystallography.     

Five new stilbene dimers from the lianas of Gnetum hainanense

Five new stilbene dimers, gnetuhainins A-E (1-5), were isolated together with resveratrol trans-dehydrodimer (6), resveratrol, oxyresveratrol, and (-)-epsilon-viniferin from the lianas of Gnetum hainanense. Their structures and stereochemistry were determined on the basis of their chemical and spectral data. Compounds 1-5 are dimers formed by a resveratrol unit and an oxyresveratrol unit and belong to a new type of oligostilbenes polymerized from two different stilbene units.