倒心盾翅藤中苯丙素蔗糖酯类成分的分离与鉴定

目的对倒心盾翅藤中的化学成分进行分离与鉴定。方法采用多种色谱法对倒心盾翅藤提取物的化学成分进行分离,并结合理化性质及波谱解析等方法进行结构鉴定。结果与结论从倒心盾翅藤干燥藤茎70%(体积分数)乙醇提取物中分离鉴定出8个苯丙素蔗糖酯类化合物,分别为helonioside A(1)、smilaside B(2)、helonioside B(3)、3,6-diferuloyl-2′,6′-diacetylsucrose(4)、(3,6-di-O-feruloyl)-β-D-fructofuranosyl-(3,6-di-O-acetyl)-α-D-glucopyranoside(5)、smilaside A(6)、β-D-(1-O-acetyl-3,6-O-diferuloyl)fructofuranosyl-α-D-2′,6′-O-diacetylglucopyranoside(7)、smiglaside C(8),它们均为首次从盾翅藤属植物中分离得到。     

黄杉化学成分的研究

目的研究黄杉的化学成分。方法用色谱方法分离黄杉化学成分,用波谱技术(IR,UV,MS,1D和2D-NMR)鉴定结构。结果从黄杉树皮中分离得到6个化合物,分别鉴定为5,7,4′-trihydroxy-6-methylflavanone (poriol, I), 3,5,7,3′,4′-pentahydroxyflavonone (quercetin, II), 5,7,3′,5′-tetrahydroxy-6-methylflavanone (III), 5,7,3′,5′-tetrahydroxyflavanone (IV), 3,5,7,3′,5′-pentahydroxyflavanone (V)和5-hydroxy-6-methylchromone-7-O-β-D-glucopyranoside (VI)。结论III,VI为新化合物,所得6个化合物均为首次从该属植物中分得。     

白花败酱草化学成分的分离与结构鉴定

目的研究白花败酱草的化学成分。方法利用溶剂萃取后进行硅胶柱和制备液相色谱分离纯化，根据理化性质和光谱数据鉴定结构。结果分离并鉴定了8个化合物：bolusanthol B (1)，(2S)-5,7,2′,6′-四羟基-6,8-二异戊烯基-二氢黄酮(2)，orotinin (3)，(2S)-5,7,2′,6′-四羟基-6-lavandulyl-二氢黄酮(4)，3′-异戊烯基-芹黄素(5)，木犀草素(6)，槲皮素(7)和洋芹素(8)。结论化合物2，4为新化合物，1，3，5为首次从败酱属植物中分离得到，6，7，8为首次从白花败酱草中分离得到。     

东南茜草藤的化学成分研究

摘 要 目的：对茜草科茜草属植物东南茜草的藤进行化学成分研究。方法: 东南茜草的干燥藤用75% 乙醇回流提取,所得浸膏用水溶解,石油醚、乙酸乙酯萃取,得粗提物。粗提物利用硅胶柱色谱、反相硅胶柱色谱、Sephadex LH-20凝胶柱色谱等多种方法进行分离纯化,根据理化性质和光谱数据 (¹H-NMR,¹³C-NMR) 对分离得到的化合物进行结构鉴定。结果:分离得到13个单体化合物,分别鉴定为：Secoisolariciresinol (1),Xanthopurpurin (2),胡萝卜苷 (Daucosterol, 3),脱氢松香酸 (Dehydroabietic acid, 4),2-hydroxy-1-methoxyanthraquinone (5),β-谷甾醇 (β-sitosterol, 6),Lirioresinol A (7),2-hydroxy-7-methyl-9,10 anthraquinone (8),Strychnovoline (9),Ciwujiatone (10),3,4-divanillyl- tetrahydrofuran (11),2-(4-hydroxypheny) 6-(3-methoxy-4-hydroxyphenyl)-3,7-dioxa-bicycle [3,3,0]octane (12), (6S,9R)-vomifoliol (13)。结论:化合物1~13为首次从东南茜草藤中分离得到,化合物1,2,4,5,7~13为首次从该属中分离得到。     

藤香树中二个新的脂肪硝基酚苷的鉴定藤香树中二个新的脂肪硝基酚苷的鉴定

目的研究藤香树Schisandra propinqua (Wall.) Baill var. intermidia A.C.Smith茎藤的化学成分。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光谱数据分析鉴定结构。结果分离得到7个化合物，分别鉴定为6′-O-α-L-arabinofuranosylthalictoside (1), 6′-O-β-D-apiofuranosylthalictoside (2), thalictoside (3), icariside D₂(4)， prinsepiol (5), (+)-1-hydroxypinoresinol (6)和(+)-medioresinol (7)。结论化合物1和2为新的脂肪硝基酚苷化合物，其余均为首次从藤香树中获得。     

卷柏中化学成分的分离与结构鉴定

目的研究中药卷柏(Selaginella tamariscina (Beauv.) Spring)水提物中的化学成分。方法用Sephadex LH-20及硅胶等色谱技术进行分离纯化,根据理化性质、光谱数据进行结构鉴定。结果得到9个化合物,分别鉴定为(2r,3s)-二氢-2-(3′,5′-二甲氧基-4′-羟基苯基)-3-羟甲基-7-甲氧基-5-乙酰基苯骈呋喃(1),3-羟基-苯丙酸-(2′-甲氧基-4′-羧基苯酚)酯(卷柏酯A,2),丁香脂素(3),1-(4′-羟基-3′-甲氧基苯基)丙三醇(4),阿魏酸(5),咖啡酸(6),香荚兰酸(7),丁香酸(8),7-羟基香豆素(9)。结论化合物1,2为新化合物,其余化合物均为首次从卷柏属植物中分离得到。     

蝉翼藤茎化学成分研究

目的对蝉翼藤(Securidaca inappendiculata Hassk.)的化学成分进行研究。方法利用硅胶柱色谱和中压液相色谱法对蝉翼藤茎的95%乙醇提取物进行分离;用UV,IR,MS,1D和2D NMR等技术对所得化合物进行结构研究。结果从蝉翼藤茎的95%乙醇提取物中分离鉴定了8个化合物,分别为:蝉翼藤萜酸苷(securiterpenoside),齐墩果酸,古柯邻二酸(P-hydroxytruxinic acid),香豆酸,对甲氧基肉桂酸乙酯,尿嘧啶核苷,β-谷甾醇和胡萝卜苷。结论 蝉翼藤萜酸苷(securiterpenoside)为新化合物,其他化合物均为首次从该属植物中分离得到。     

三叶鬼针草中的黄酮类成分(英文)

研究了三叶鬼针草Bidens pilosa L.全草的化学成分。利用各种色谱和波谱方法分离并鉴定了13个黄酮类化合物,分别为:2′-hydroxy-4,4′-dimethoxy-chalcone(1),isoliquiritigenin(2),3,2′4′-trihydroxy-4-methoxy-chalcone(3),licochalcone A(4),4′-O-β-D-glucopyranosyl-2′,3-dihydroxy-4-methoxy-chalcone(5),butein(6),apigenin(7),luteolin(8),diosmetin(9),chrysoeriol(10),3,5,6,7,3′,4′,5′-heptamethoxyflavone(11),7-O-β-D-glucopyranosyl-5,3′-dihydroxy-3,6,4′-trimethoxyflavone(12),sulfuretin(13)。化合物1-5,9,11均为首次从鬼针草属植物中分离得到。     

蝉翼藤根中的一个新二苯酮

目的对蝉翼藤(Securidaca inappendiculata Hassk.)根的二苯酮成分进行分离和结构鉴定。方法通过硅胶和凝胶反复柱色谱分离得到二苯酮类化合物；利用多种波谱技术鉴定其化学结构。结果分离鉴定了2个二苯酮化合物，其结构分别为2-甲氧基-3,4-亚甲二氧基-二苯酮(I)，4-羟基-2,6-二甲氧基-二苯酮(II)。结论化合物I为新化合物，命名为蝉翼藤二苯酮B；化合物II为首次自该属植物中分离得到。     

鹅掌藤中三萜类化合物的分离与鉴定

目的研究五加科鹅掌柴属植物鹅掌藤(Schefflera arboricola)枝茎的化学成分.方法采用柱色谱分离,通过理化数据和光谱分析确定化合物的结构.结果从鹅掌藤乙酸乙酯提取物中分离得到7个三萜化合物,分别鉴定为羽扇醇(1)、桦木酸(2)、3-epi-betulinic acid(3)、齐墩果酸(4)、3-乙酰齐墩果酸(5)、mesembryanthemoidigenic acid(6)、quinatic acid(7).结论化合物1、5、6、7为首次从该属植物中分得.     

鸡血藤的化学成分研究

目的:研究中药鸡血藤的化学成分。方法:利用多种柱色谱法进行分离纯化,根据光谱数据和化学方法进行结构鉴定。结果:从鸡血藤70%乙醇浸膏的乙醇乙酯部分分离鉴定了8个化合物:密花豆素(化合物1)、芒柄花素(化合物2)、大豆苷元(化合物3)、毛蕊异黄酮(化合物4)、焦性粘液酸(化合物5)、间苯三酚(化合物6)、琥珀酸(化合物7)、β-谷甾醇(化合物8)。结论:化合物1为7,3’,4’—三羟基—6—甲氧基二氢黄酮,是一个新化合物,化合物4、5、6、7则为首次从本属植物中得到。     

鸡血藤化学成分的分离与结构鉴定

目的对中药鸡血藤(Spatholobus suberectus Dunn)中化学成分进行分离及结构鉴定。方法采用正相硅胶、反相ODS、Sephadex LH-20等柱色谱及高效液相色谱等手段进行分离纯化,并通过理化性质与波谱分析方法鉴定了化合物的结构。结果从鸡血藤体积分数为95%的乙醇提取物中分离鉴定了9个单体成分,分别为blumenol A(1)、(6S,7E,9R)-roseoside(2)、(6S,7E,9R)-6,9-dihydroxy-4,7-megastigman-3-one-9-O-[α-L-arabinopyranosyl-(1→6)-(β-D-glucopyranoside](3)、7S,8R-erythro-4,9,9'-trihydroxy-3,3'-dimethoxy-8-O-4'-neolignan-7-O-β-D-glucopyranoside(4)、(7S,8R)-dihydrodehydrodiconiferyl alcohol-4-O-(β-D-glucopyranoside(5)、(7S,8R)-3,3',5-trimethoxy-4',7-epoxy-8,5'-neolignan-4,9,9'-triol(6)、次黄苷(hypoxanthine-9-β-D-ribofuranoside,7)、烟酸(nicotinic acid,8)和丁二酸(amber acid,9)。结论其中2-8均为首次从密花豆属中分离得到的化合物。     

鸡血藤的化学成分研究

目的研究中药鸡血藤(Spatholobus suberectus Dunn)的化学成分。方法利用多种柱色谱方法进行分离纯化,根据光谱数据和化学方法进行结构鉴定。结果从鸡血藤70%乙醇浸膏的乙酸乙酯部分分离鉴定了8个化合物,分别是:密花豆素(1)、芒柄花素(2)、大豆苷元(3)、毛蕊异黄酮(4)、焦性粘液酸(5)、间苯三酚(6)、琥珀酸(7)、β-谷甾醇(8)。结论化合物1为7,3′,4′-三羟基-6-甲氧基二氢黄酮,是1个新化合物,命名为密花豆素,化合物4,5,6和7为首次从本属植物中得到。     

A new cerebroside from Uvaria tonkinensis var. subglabra

A new cerebroside, subglain A (1), together with five known compounds (2-6) have been isolated from the stems of Uvaria tonkinensis var. subglabra. The structure of 1 has been determined to be 1-O-beta-D-glucopyranosyl-(2S,3S,4R,8Z,2'R)-2-[N-(2'-hydroxytetracosanyl)-N-(1',2'-dihydroxyethyl)-amide]-8-tetradecene-1,3,4-triol by spectroscopic evidence. The known compounds were identified as schisandriside (2), erythritol (3), beta-D-glucopyranose (4), kaempferol-3,7-O-alpha-L-dirhamnoside (5), and (+)-lyoniresinol (6).     

Taraxasterane-type triterpene and neolignans from Geum japonicum Thunb. var. chinense F. Bolle

The phytochemical investigation of the ethanolic extract of the whole plants of Geum japonicum Thunb. var. chinense F. Bolle yielded four new compounds: 20 β,28-epoxy-28-hydroxytaraxasteran-3 β-ol (1), (7R,8R)-4-hydroxy-9'-O-(α-L-rhamnopyranosyl)-3,3',5'-trimethoxy-8-O-4'-neolignan (2), (7R,8S)-4-hydroxy-9'-O-(α-L-rhamnopyranosyl)-3,3',5'-trimethoxy-8-O-4'-neolignan (3), and (7S,8S)-5-methoxycupressoside A (4), as well as 40 other known compounds. Structures were elucidated by physical, chemical, and spectroscopic methods, including 1D and 2D NMR, HRESIMS, and CD experiments. The taraxasterane-type triterpene (1) and lignans (2- 6) are reported for the first time from the GEUM genus. Moreover, all compounds were evaluated for anti-inflammatory activities against NO production in RAW264.7 macrophages, and only moderate activities were detected.     

Flavonoids with activity against methicillin-resistant Staphylococcus aureus from Dalea scandens var. paucifolia

Bioassay-guided fractionation of the ethyl acetate extract of the roots of Dalea scandens (Miller) R. Clausen var. paucifolia led to the isolation of new flavonoids, 2( S)-5'-(-1"',1"'-dimethylallyl)-8-(3",3"-dimethylallyl)-2',4',5,7-tetrahydroxyflavanone, 2( S)-5'-(1"',1"'-dimethylallyl)-8-(3",3"-dimethylallyl)-2'-methoxy-4',5,7-trihydroxyflavanone and 5'-(1"',1"'-dimethylallyl)-8-(3",3"-dimethylallyl)-2',4',5,7-tetrahydroxyflavone. Structure elucidation was carried out by spectroscopic methods. All three compounds showed significant activity against both methicillin-susceptible and methicillin-resistant Staphylococcus aureus.     

Dihydrochalcones from Piper longicaudatum

Bioactivity-guided fractionation of an ethanolic extract of the leaves and twigs of Piper longicaudatum Trelease & Yunker (Piperaceae) resulted in the isolation of one new (1) and three known (2-4) dihydrochalcones. The known compounds are: 2',6'-dihydroxy-4'-methoxydihydrochalcone (2), 2',6',4-trihydroxy-4'-methoxydihydrochalcone (asebogenin) (3), and 2'-hydroxy-4'-methoxy-2'-[1-hydroxy-1-methylethyl]-2",3"-dihy- drofurano[4",5":5',6"]-3"-[2-hydroxy-5-methoxycarbonylphe- nyl]dihydrochalcone (piperaduncin B) (4). The new compound is 2'-hydroxy-4'-methoxy-2"-[2-hydroxy-5-methoxycarbonyl- phenyl]-furano[4",5":5',6']-dihydrochalcone (longicaudatin) (1). Compounds 1-4 were tested for antibacterial activity against S. aureus and methicillin-resistant S. aureus (MRSA); only compound 3 showed inhibitory activity (IC50 of 10 and 4.5 micrograms/ml, respectively).     

Cytotoxic terpenoid and immunosuppressive phenolic glycosides from the root bark of Dictamnus dasycarpus

Five new compounds, two degraded terpene glycosides, dasycarpusides A and B (1, 2), and three phenolic glycosides, 2-methoxy-4-hydroxymethylphenol 1-O-alpha-rhamnopyranosyl-(1"-->6')- beta-glucopyranoside ( 3), 2-methoxy-4-acetylphenol 1-O-alpha-rhamnopyranosyl-(1"-->6')-beta-glucopyranoside (4), and 2-methoxy-4-(8-hydroxyethyl)-phenol 1-O-alpha-rhamnopyranosyl-(1"-->6')-beta-glucopyranoside (5), were isolated from the water-soluble constituents of the root bark of Dictamnus dasycarpus Turcz.(Rutaceae). Their structures were elucidated by spectroscopic analysis and chemical evidence. Moreover, it was found that dasycarpuside A (1) showed weak cytotoxic activity against A-549 (human lung adenocarcinoma) cell line, while 4 and 5 showed more remarkable activity of inhibiting the proliferation of T-cells in vitro.