长梗喉毛花口山酮类化学成分的研究

目的:研究长梗喉毛花醋酸乙酯部位中(口山)酮类化学成分.方法:应用多种色谱技术进行分离纯化,根据化合物的理化性质和波谱数据鉴定化合物的结构.结果:从长梗喉毛花全草70%乙醇提取物的醋酸乙酯萃取部位对DL-半乳糖胺所致的肝损伤具有保肝作用的活性部位中分离得到9个(口山)酮类化合物,分别鉴定为1,8-二羟基-2,6-二甲氧基(口山)酮(1),8-羟基-1,2,6-三甲氧基(口山)酮(2),1,6,8-三羟基-2-甲氧基(口山)酮(3),1,8-二羟基-3,5-二甲氧基(口山)酮(4),1-羟基-3,5,8-三甲氧基(口山)酮(5),1-羟基-3,7-二甲氧基(口山)酮(6),1,2,6,8-四羟基(口山)酮(7),1,3,7-三羟基-4-甲氧基(口山)酮(8),6,8-二羟基-1,2-二甲氧基(口山)酮(9).结论:化合物6～9为首次从该属植物中分离得到.     

胡桃楸根的化学成分

目的：对胡桃楸根的化学成分进行分离鉴定。方法：采用硅胶柱层析，重结晶等技术分离纯化化合物；根据理化性质、光谱数据鉴定结构。结果：从胡桃楸根乙醇提取物的石油醚部分中分离得到7个化合物，分别为β-谷甾醇（1）、齐墩果酸（2）、1，8-二羟基-3，7-二甲氧基口山酮（3）、1-羟基-3，7，8-三甲氧基口山酮（4）、α-乳香酸（5）、1，7-二羟基-3，8-二甲氧基口山酮（6）、1，5，8-三羟基-3-甲氧基口山酮（7）。结论：化合物2-7首次从胡桃属分离得到。     

藏药湿生扁蕾的化学成分研究Ⅰ

目的 :对湿生扁蕾全草进行化学成分研究。方法 :用常压硅胶柱和薄层色谱法分离 ,根据理化性质和波谱数据鉴定其结构。结果 :分离得到了 6个化合物 ,鉴定为 1,7-二羟基-3,8-二甲氧基酮 (Ⅰ ) ,1-羟基-3,7,8-三甲氧基酮 (Ⅱ ) ,1,8-二羟基-3,7-二甲氧基酮 (Ⅲ ) ,1-羟基-3,7-二甲氧基酮 (Ⅳ ) ,β-谷甾醇 (Ⅴ ) ,胡萝卜苷(Ⅵ )。结论 :化合物Ⅲ～Ⅵ为首次从该植物中分离得到。     

黄花倒水莲的化学成分及抗氧化活性研究

目的:研究黄花倒水莲Polygalafallax的化学成分及药理活性。方法:利用多种色谱技术进行分离纯化,根据理化性质和光谱分析鉴定结构。采用4个抗氧化模型对分离出来的单体进行体外活性筛选。结果:从黄花倒水莲根的醋酸乙酯部分中分离得到了7个(口山)酮类的化合物,分别鉴定为1,7-二羟基-2,3-亚甲二氧基(口山)酮(1),1-甲氧基-2,3-亚甲二氧基(口山)酮(2),3-羟基-1,2-二甲氧基(口山)酮(3),1,6,7-三羟基-2,3-二甲氧基(口山)酮(4),7-羟基-1-甲氧基-2,3-亚甲二氧基(口山)酮(5),1,3-二羟基-2-甲氧基(口山)酮(6),1,3,7-三羟基-2-甲氧基(口山)酮(7)。在药理活性研究中,化合物1-7在不同的药理模型中显示了不同程度的抗氧化活性。结论:化合物2,3,5,7为首次从黄花倒水莲中分离。该植物中的(口山)酮类成分具有一定的抗氧化作用,这也是首次对该植物的单体成分进行药理活性研究。     

青叶胆化学成分研究

目的：对龙胆科獐牙菜属植物青叶胆Swertia mileensis的干燥全草进行化学成分研究。方法：青叶胆的干燥全草用50%乙醇提取，依次用石油醚、氯仿、正丁醇萃取，对氯仿部分采用各种柱色谱进行分离纯化，通过波谱数据分析进行结构鉴定。结果：从氯仿部分分离鉴定了12个化合物，其中8个酮，1，5，8-三羟基-3-甲氧基酮(1)，1-羟基-2，3，5，7- 四甲氧基酮(2)，1-羟基-3，5，8-三甲氧基酮(3)，1-羟基-2，3，4，6-四甲氧基酮(4)，1-羟基-2，3，4，7-四甲氧基酮(5)，1，8-二羟基3，5-二甲氧基酮(6)，1，7-二羟基-3，8-二甲氧基酮(7)，1，3，5，8-四羟基酮(8)，1个木脂素，balanophonin(9)，3个三萜，齐墩果酸(10)，山楂酸(11)，苏门树脂酸(12)。结论：化合物1，3，7～9，11，12为首次从青叶胆中分离得到。     

A new chalcone, xanthones, and a xanthonolignoid from Hypericum geminiflorum.

A new prenyl chalcone, gemichalcone C (1), was isolated from the heartwood and root of Hypericum geminiflorum. Three new xanthones-6, 7-dihyroxy-1,3-dimethoxyxanthone (2), 4-hydroxy-1, 2-dimethoxyxanthone (3), and gemixanthone A (4)-and four known xanthones were isolated from the leaves and stems of the same plant.     

蝉翼藤根茎化学成分研究

目的:研究蝉翼藤根茎氯仿部分化学成分。方法:采用各种色谱法分离,运用多种波谱技术鉴定结构,并对部分化合物进行了体外DPPH抗氧化试验。结果:分离鉴定出7个化合物,经鉴定为:3,4-二羟基苯甲酸(1),3-羟基-4-甲氧基苯甲酸(2),4-羟基-3-甲氧基-1-烯丙醛基苯(3),7-羟基-1,2,3,8-四甲氧基酮(4),1,3,8-三羟基-4-甲氧基酮(5),1,3,8-三羟基-2-甲氧基酮(6),1,3,6-三羟基-2,7-二甲氧基酮(7)。结论:化合物1～6为首次从该属中得到,化合物3表现出良好的抗氧化能力IC₅₀=4.14μg·mL^-1。     

黑边假龙胆的化学成分（英文）

目的：对黑边假龙胆的化学成分进行研究。方法：应用硅胶柱色谱,Sephadex LH-20和Rp-18反相柱色谱的方法分离和纯化化合物, 通过光谱方法及理化性质鉴定化合物结构。结果：分离得到9个化合物,分别鉴定为1-羟基-3, 7, 8-三甲氧基酮（1）、1,8-二羟基-3, 5-二甲氧基酮（2）、木犀草素（3）、β-胡萝卜苷（4）、海波拉亭（5）、1-羟基-3,5, 8-三甲氧基酮（6）、熊果酸（7）、雏菊叶龙胆（8）、木犀草素-5-O-β-D-葡萄糖苷（9）。结论：化合物 1～3、5～7、9均首次从该种植物中分离得到。     

薄叶红厚壳根的呫吨酮成分（英文）

目的：研究薄叶红厚壳根的乙酸乙酯部位的化学成分。方法：运用各种色谱方法进行化学成分的分离纯化, 用理化方法和波谱数据解析其化学结构。结果：分离得到 11 个呫吨酮,结构分别为 1, 7-二羟基-3-甲氧基呫吨酮（1）, 1, 5, 6-三羟基呫吨酮（2）, 1, 3, 6-三羟基-5-甲氧基呫吨酮（3）, 1, 3, 7-三羟基呫吨酮（4）, 1-羟基-6, 7-二甲氧基呫吨酮（5）, 3, 5-二羟基呫吨酮（6）, 4-羟基-3-甲氧基呫吨酮（7）, 1, 2-二甲氧基呫吨酮（8）, 1, 3, 5-三羟基呫吨酮（9）, pyranojacareubin（10）, 1, 4, 5-三羟基呫吨酮（11）。结论：所有的化合物均为首次从该植物中分离得到, 其中 1, 3-7, 9 为首次从该属植物中分离得到。     

Chemical constituents of Swertia tetraptera Maxim. var. xinglongensis Ji Ma et R. N. Zhao]

Five natural products were isolated from S. tetraptera var. xinglongensis of which four were proved to be oleanolic acid, 1,3-dihydroxy-4,7-dimethoxyxanthone, 1-hydroxy-2,3,5-trimethoxyxanthone and beta-sitosterol. 1,3-dihydroxy-4,7-dimethoxyxanthone has been obtained for the first time from the genus Swertia.     

Five new phenolics from the roots of Ficus beecheyana

From the ethanolic extract of the roots of Ficus beecheyana, threo-2,3-bis(4-hydroxy-3-methoxyphenyl)-3-ethoxypropan-1-ol (1), erythro-2,3-bis(4-hydroxy-3-methoxyphenyl)-3-ethoxypropan-1-ol (2), trans-4,5-bis(4-hydroxy-3-methoxyphenyl)-1,3-dioxacyclohexane (3), threo-3-(4-hydroxy-3,5-dimethoxyphenyl)-3-ethoxypropane-1,2-diol (4), 2,3-dihydroxy-1-(4-hydroxy-3,5-dimethoxyphenyl)-1-propanone (5), and 3-hydroxy-1-(4-hydroxy-3,5-dimethoxyphenyl)-1-propanone (6) were isolated. The structures of the new compounds 1-5 were elucidated by the analysis of their spectroscopic data.     

红葱的化学成分研究

目的研究红葱Eleutherine americana的化学成分。方法采用硅胶柱色谱、Sephadex LH-20柱色谱及重结晶等方法,分离纯化红葱的化学成分,通过MS、NMR等波谱技术确定化合物结构。结果确定了7个化合物的结构,分别为9-hydroxy-8-methoxy-1-methyl-1,3-dihydronaphtho[2,3-c]furan-4-O-β-D-glucopyranoside(1)、eleutherinoside A(2)、豆甾醇-3-O-β-D-葡萄糖苷(3)、kadsuric acid(4)、豆甾醇(5)、1,2-二羟基-8-甲氧基-3-甲基蒽醌(6)、9-methoxy-1,3-dimethyl-1H-naphtho[2,3-c]pyran-5,10-dione(7)。结论化合物1为新化合物,命名为红葱新苷。化合物3～5为首次从该植物中分离得到,化合物6和7为首次获得的新天然产物。     

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??OBJECTIVE To study the chemical components of the aqueous extract of Solanum lyratum. METHODS The compounds were isolated and purified by column chromatography and their structures were elucidated by spectroscopic methods. RESULTS Nine phenylpropanoids were obtained from aqueous extracts of Solanum lyratum. The structures were determined as chlorogenic acid(1), crptochlorogenic acid(2), neochlorogenic acid(3), erythro-1,2-bis-(4-hydroxy-3- methoxyphenyl)-1,3-propanediol(4), threo-1,2-bis-(4-hydroxy-3-methoxyphenyl)-1,3-propanediol(5), erythro-2,3-bis-(4-hydroxy-3-methoxyphenyl)-3-methoxypropanol(6), threo-2,3-bis-(4-hydroxy-3- methoxyphenyl)-3-methoxypropanol(7), syringaresinol(8), and liriodendrin(9). CONCLUSION Compounds 2-9 are isolated from Solanum lyratum for the first time.     

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??OBJECTIVE To study the chemical ethyl acetate-soluble constituents of the leaves of Callicarpa kwangtungensis Chun. METHODS The compounds were isolated and purified by column chromatography using silica gel, Sephadex LH-20, ODS and MPLC. The structures of the compounds were identified according to their physicochemical properties and spectroscopic methods. RESULTS Thirteen compounds were isolated and identified as 5,7,2??,6??-tetrahydroxyflavone(1), 2,3-dehydrosilychristin(2), silychristin A(3), dihydroquercetin(4), syringaresinol(5), medioresinol(6),(7R,8S)-3,5??-dimethoxy-4??,7-epoxy-8,3??-neolignane -5,9,9??-triol(7),(2S,3R)-methyl-7-hydroxy-2-(4-hydroxy-3-methoxyphenyl)-3-(hydroxymethyl)-2,3-dihydrobenzofuran-5-carboxylate(8), curcasinlignan B(9), vanillin(10), 19??-hydroxyursolic acid(11), 2??,3??,19??,23-tetrahydroxy-12-ene-28-oleanolic acid(12), and euscaphic acid(13). CONCLUSION All these compounds were isolated from this plant for the first time.     

Triterpenoids and aromatics from Derris laxiflora

Seven new compounds, O-trans-cinnamoylglutinol (1), 22β-hydroxy-12-oleanen-3-one (2), 15α,16α-epoxy-12-oleanen-3-one (3), 29-hydroxy-12-oleanene-3,22-dione (4), 22β,29-dihyroxy-12-oleanen-3-one (5), 2,3-(methylenedioxy)-4-methoxy-5-methylphenol (8), and 2,3,6-trimethoxy-5-methylphenol (9), as well as two first isolated from natural sources, 25-cycloartene-3,24-dione (6) and 24ξ-hydroxy-25-cycloarten-3-one (7), were characterized from Derris laxiflora. The structures of these compounds were determined by analysis of their spectroscopic data.     

Mixed lignan-neolignans from Tarenna attenuata

Six new mixed lignan-neolignans and 20 known compounds were isolated from the whole plant of Tarenna attenuata. By analysis of physical and spectroscopic data, the structures of the new compounds were elucidated as (1R,5R,6R)-6-{4-O-[2-(1-(4-hydroxy-3-methoxyphenyl))glycerol]-3,5-dimethoxyphenyl}-3,7-dioxabicyclo[3.3.0]octan-2-one (1), 5' '-methoxyhedyotisol A (2), 4' '-O-(8-guaiacylglycerol)buddlenol A (3), 5' '-methoxy-4' '-O-(8-guaiacylglycerol)buddlenol A (4), 4,6-dimethoxy-5-hydroxy-3-hydroxymethyl-2-(3,4,5-trimethoxyphenyl)-2,3-dihydrobenzofuran (5), and 7-O-ethylguaiacylglycerol (6). Compounds 1, 5, 6, and 8 showed potent antioxidant activities against H2O2-induced impairment in PC12 cells, and compounds 1, 2, 5, and 7 scavenged DPPH radical strongly with IC50 values of 72, 87, 45, and 55 microM, respectively.     

New flavonol-phenylbutadiene adducts from the leaves of Alpinia flabellata

Two new flavonol-phenylbutadiene adducts, rel-5-hydroxy-7,4'-dimethoxy-2' 'S-(2,4,5-trimethoxy-E-styryl)tetrahydrofuro[4' 'R,5' 'R:2,3]flavanonol (1) and rel-5-hydroxy-7,4'-dimethoxy-3' 'S-(2,4,5-trimethoxy-E-styryl)tetrahydrofuro[4' 'R,5' 'R:2,3]flavanonol (2), were isolated from the leaves of Alpinia flabellata, along with three known compounds, 2,4,5-trimethoxybenzoic acid, 2,4,5-trimethoxycinnamic acid, and 5-hydroxy-3,7,4'-trimethoxyflavone. The structures of 1 and 2 were determined by spectroscopic interpretation.     

Bromophenol derivatives from the red alga Rhodomela confervoides

Eight new bromophenol derivatives, 2,3-dibromo-4,5-dihydroxybenzyl methyl sulfoxide (1), 4-(2,3-dibromo-4,5-dihydroxyphenyl)-3-butene-2-one (2), 2-(3-bromo-5-hydroxy-4-methoxyphenyl)-3-(2,3-dibromo-4,5-dihydroxyphenyl)propionic acid (3), 2-(3-bromo-5-hydroxy-4-methoxyphenyl)-3-(2,3-dibromo-4,5-dihydroxyphenyl)propionic acid methyl ester (4), 2-phenyl-3-(2,3-dibromo-4,5-dihydroxyphenyl)propionic acid (5), 4'-methoxy-2',3',3'-tribromo-4',5',5'-trihydroxydiphenylacetic acid (6), and 3-bromo-5-hydroxy-4-methoxyphenylacetic acid (7) and its methyl ester (8), together with a known bromophenol, 3-bromo-5-hydroxy-4-methoxybenzoic acid (9), were isolated from the red alga Rhodomela confervoides. Their structures were elucidated by spectroscopic methods including IR, EIMS, FABMS, ESIMS, HRFABMS, HRESIMS, 1D and 2D NMR, and single-crystal X-ray structure analysis. Compounds 1-4, 8, and 9 were found inactive against several human cancer cell lines and microorganisms.     

甘遂的化学成分

目的:研究中药甘遂的化学成分。方法:利用反复硅胶色谱柱进行分离纯化,通过理化性质和波谱数据分析鉴定化合物结构。结果:分离并鉴定出8个化合物,分别为3-O-benzoyl-13-O-dodecanoyl-20-O-acetyl-ingenol (1) ,3-O-(2 ,3-dimethylbutanoyl)-13-O-dodecanoyl-20-deoxy-ingenol(2) ,3-O-(2 ,3-dimethylbutanoyl)-13-O-dodecanoyl-ingenol (3) ,3-O- (2′E,4′Z-decadienoyl)-20-O-acetyl-ingenol (4) ,3-O-(2′E,4′E-decadienoyl)-ingenol (5) ,cycloeucalenol (6) ,24-methylenelanost-9(11)-en-3β-ol (7) ,和7-羟基-6-甲氧基香豆素(8)。结论:化合物1为新化合物,5 ~8为首次从该植物分得,在体外肿瘤细胞株的细胞毒活性筛选中,化合物2 ~5显示对Namalwa细胞株有细胞毒,其IC50分别为12 .9 ,11 .9 ,7 .6和5 .2μmol.L-1。     

三角叶凤毛菊中类异戊二烯和苯丙素类化学成分

目的:研究菊科药用植物三角叶凤毛菊Saussurea deltoidea的化学成分.方法:利用正/反相硅胶柱层析色谱、凝胶分子筛色谱、HPLC等色谱方法进行化合物的分离,利用波谱学方法鉴定化合物结构.结果:从三角叶凤毛菊中分离出10个化合物,其结构分别鉴定为(3R,6R,7E)-3-hydroxy-4,7 -megastigmadien-9 -one(1),(3S,5R,6S,7E)-5,6-epoxy-3-hydroxy-7-megastigmen-9-one (2),3 -h ydroxy-β-damascone(3),S-(+)-dehydrovomifoliol(4),megastigman-5 -ene-3β,9R-diol(5),coniferaldehyde(6),β-hydroxypropiovanillone (7),3-hydroxy-1- (4-hydroxy-3,5-dimethoxyphenyl)-1-propanone (8),dihydrosyringenin(9),4-[(1S)-3-hydroxy-1-methoxypropyl]-2,6-dimenthoxyphenol( 10).结论:化合物1～10均是首次从该植物中分离得到.