中药白头翁地上部分的三萜皂苷成分

为了研究白头翁地上部分的三萜皂苷成分，采用不同色谱技术对白头翁地上部分乙醇提取物的正丁醇部位进行分离纯化，并用波谱和化学方法鉴定化合物的结构。从正丁醇部位中共分离得到7个三萜皂苷类化合物，其结构分别被鉴定为2β-羟基常春藤皂苷元28-O-α-L-吡喃鼠李糖(1→4)-β-D-吡喃葡糖(1→6)-β-D-吡喃葡糖酯苷(1)、3-O-α-L-吡喃阿拉伯糖常春藤皂苷元28-O-α-L-吡喃鼠李糖(1→4)-β-D-吡喃葡糖(1→6)-β-D-吡喃葡糖酯苷(2)、3-O-α-L-吡喃鼠李糖(1→2)-α-L-吡喃阿拉伯糖齐墩果酸28-O-α-L-吡喃鼠李糖(1→4)-β-D-吡喃葡糖(1→6)-β-D-吡喃葡糖酯苷(3)、3-O-α-L-吡喃鼠李糖(1→2)［β-D-吡喃葡糖(1→4)］-α-L-吡喃阿拉伯糖常春藤皂苷元28-O-α-L-吡喃鼠李糖(1→4)-β-D-吡喃葡糖(1→6)-β-D-吡喃葡糖酯苷(4)、3-O-α-L-吡喃鼠李糖(1→2)-α-L-吡喃阿拉伯糖常春藤皂苷元28-O-α-L-吡喃鼠李糖(1→4)-β-D-吡喃葡糖(1→6)-β-D-吡喃葡糖酯苷(5)、常春藤皂苷元28-O-α-L-吡喃鼠李糖(1→4)-β-D-吡喃葡糖(1→6)-β-D-吡喃葡糖酯苷(6)及常春藤皂苷元3-O-α-L-吡喃鼠李糖(1→2)-α-L相似文献   

山楂叶化学成分研究

目的　研究山楂(CrataeguspinnatifidaBge .varmajorN .E .Br.)叶中的化学成分。方法　用大孔树脂柱色谱、硅胶柱色谱和聚酰胺柱色谱等技术进行分离纯化,根据理化性质和光谱数据进行结构鉴定。结果　得到8个化合物,分别为山楂素I(1) ,槲皮素(2 ) ,3-O-β-D-吡喃葡糖槲皮素(3) ,3-O-β-D-吡喃半乳糖槲皮素(4) ,3-O-β-D-吡喃葡糖(6→1)-α-L-鼠李糖槲皮素(5 ) ,3-O-β-D-吡喃半乳糖(6→1)-α-L-鼠李糖槲皮素(6 ) ,山萘酚(7) ,7-O-α-L-鼠李糖-3-O-β-D-葡糖山萘酚(8)。结论　1为新化合物,8为首次从该属中分得     

无毒棉花籽中黄酮苷的分离与结构鉴定

目的　研究无毒棉花籽(glandlesscottonseed)中的黄酮类化学成分。方法　利用大孔树脂、聚酰胺-6、硅胶和SephadexLH-20柱色谱进行分离纯化。用UV ,MS ,¹HNMR ,¹³CNMR ,¹H-¹HCOSY ,¹H-¹³CCOSY ,HMBC和TOCSY等光谱确定化合物结构。结果　从无毒棉花籽中分离得到5个黄酮苷,经光谱鉴定化合物结构为:山奈酚-3-O-β-D-芹菜糖( 1→2 )-[α-L-鼠李糖(1→6)]-β-D-葡糖苷(I)、槲皮素-3-O-β-D-芹菜糖 ( 1→2)-[α-L-鼠李糖( 1→6)]-β-D-葡糖苷(II)、槲皮素-3-O-β-D-芹菜糖 ( 1→2 )-β-D-葡糖苷(III)、芦丁(IV)和陆地棉苷(V)。结论　I是一个新化合物,II和III为首次从该属植物中分离得到。     

海南冬青中的一个新三萜甙

从冬青科植物海南冬青(Ilex hainanensis Merr.)的叶中分离得一新的△¹²-齐墩果叶-烷型的三萜酯甙,甙元的结构为齐墩果叶12-烯23α,28β-二酸3β,16α-二羟基(olean-12-23α,28β-dioic acid 3β,16α-dihydroxyl,Ⅱ),甙的结构为Ⅱ的β-D-葡萄糖(1′→28)酯(β-D-glucopyranosyl(1′→28)ester of Ⅱ),命名为海南冬青甙(hainanenside,Ⅰ)。     

盾叶薯蓣中水溶性甾体皂苷成分

为研究盾叶薯蓣的水溶性化学成分，用溶剂提取，色谱法分离，光谱法鉴定结构。从盾叶薯蓣的水溶液中分离到5个甾体皂苷(I～V)，经分析¹H NMR、 ¹³C NMR、¹³⁵DEPT、 HMQC、 HMBC和TOCSY谱，鉴定了化合物的结构，其中4个为原甾体皂苷，1个为甾体皂苷。化合物V为(25R)-26-O-(β-D-glucopyranosyl)-furost-5-en-3β,22ξ,26-triol-4β-acetoxyl-3-O-β-D-glucopyranosyl-(1→3)-β-D-glucopyranosyl-(1→4)-［α-L-rhamnopyranosyl-(1→2)］-β-D-glucopyranoside，为1新化合物，命名为zingiberenin G，化合物I、II、III在盾叶薯蓣中为首次报道。     

两头尖的化学成分研究

目的研究两头尖的化学成分。方法通过硅胶柱色谱,大孔树脂柱色谱及高压液相色谱等方法分离两头尖各部分提取物,根据理化性质和光谱分析鉴定化学结构。结果从两头尖根茎中分离得到9个化合物,分别鉴定为:27-hydroxyolean-12(13)-en-28-oic-acid-3-o-α-L-rhamnopyranosyl-(1→2)-α-L-arabinopyranoside (1),五加苷K(eleutheroside K, 2),oleanolic acid-3-O-α-L-rhamnopyranosyl-(1→2)-［β-D-glucopyranosyl-(1→4)］-α-L-arabinopyranoside (3),桦树脂醇(betulin, 4),桦树脂酸(betulic acid, 5),乙酰齐敦果酸(acetyloleamolic acid, 6),卫矛醇(evonymitol, 7),齐敦果酸(oleamolic acid, 8),薯蓣皂苷元(diosgenin, 9)。结论化合物1为新化合物,命名为raddeanoside 12。化合物3～7为首次自该植物中得到。     

知母中的两种新呋甾皂苷

目的研究知母根茎的化学成分。方法采用水煎提取、大孔吸附树脂SP825柱色谱、反相C₁₈柱色谱等进行分离，并通过化学手段和光谱分析(FAB-MS，¹H NMR，13C NMR，¹H-¹H COSY)鉴定其化学结构。结果从知母根茎中分离得到6种甾体皂苷，分别鉴定为：(25S)-26-O-β-D-吡喃葡糖基-22-羟基-5β-呋甾-2β，3β，26-三醇-3-O-β-D-吡喃葡糖基-(1→2)-β-D-吡喃半乳糖苷(知母皂苷N，1)，知母皂苷E_l(2)，(25S)-26-O-β-D-吡喃葡糖基-22-甲氧基-5β-呋甾-2β，3β，26-三醇-3-O-β-D-吡喃葡糖基-(1→2)-β-D-吡喃半乳糖苷(知母皂苷O，3)，知母皂苷E₂(4)，(25R)-26-O-β-D-吡喃葡糖基-22-羟基-5α-呋甾-2α，3β，26-三醇-3-O-β-D-吡喃葡糖基-(1→2)-［β-D-吡喃木糖基-(1→3)］-β-D-吡喃葡糖基-(1→4)-β-D-吡喃半乳糖苷(purpureagitosid，5)，marcogenin-3-O-β-D-glucopyranosyl-(1→2)-β-D-galactopyranoside (6)。结论化合物1和3为新化合物，命名为知母皂苷N和知母皂苷O，化合物5为首次从知母中分离得到。     

芝麻花化学成分的研究

芝麻花为胡麻科植物胡麻Sesamum indicum L.(S.orientale L.)的干燥花,有生发、消肿之功效,可治疗脱发、冻疮、便秘等。民间单方芝麻花治疗寻常疣、扁平疣等,均有满意的疗效。目前人们对芝麻种子的化学成分研究较多,但尚没有人对芝麻花的化学成分进行系统研究。本研究运用硅胶柱、凝胶柱、反相柱等多种色谱方法进行分离纯化,并根据理化性质和波谱数据鉴定化合物的结构。从其乙醇提取物的乙酸乙酯和正丁醇部位分别得到10个化合物,分别鉴定为latifonin (1),苦瓜脑苷(momor-cerebroside,2),大豆脑苷II(soya-cerebroside II,3),1-O-β-D-葡糖-(2S,3S,4R,5E,9Z)-2-n-(2′-羟基二十四碳酰氨基)-1,3,4-三羟基-十八碳-5,9-二烯［1-O-β-D-glucopyranosyl-(2S,3S,4R,5E,9Z)-2-n-(2′-hydroxytetra-cosanoyl) 1,3,4-trihydroxy-5,9-octadienine,4］,1-O-β-D-葡糖-(2S,3S,4R,8Z)-2N-(2′-羟基二十四碳酰氨基)-3,4-二-羟基-8-十八碳烯［1-O-β-D-glucopyranosyl-(2S,3S,4R,8Z)-2-n-(2′R) 2′-hydroxytetracosanoyl)-3,4-dihydroxy-8-octadene,5］,2-乙酰橙酰胺［(2S,1″S)-aurantiamide acetate,6］,苯基乙醇-O-(2′-O-β-D-吡喃鼠李糖,3′-O-β-D-吡喃葡糖)-β-D-吡喃葡糖［benzyl alcohol-O-(2′-O-β-D-xylopyranosyl, 3′-O-β-D-glucopyranoside)-β-D-glucopyranoside,7］,β-谷甾醇(8),胡萝卜苷(9),D-半乳糖醇(10)。其中化合物4为新化合物,所有化合物均为首次从该植物的花中分离得到。     

石蝉草中的三个新黄酮苷

为了研究石蝉草的化学成分，用色谱法进行分离纯化，从石蝉草的正丁醇萃取部位分离得到3个化合物，根据光谱数据和理化性质进行结构鉴定，分别鉴定为阿拉波亭-4′，7-二甲醚-8-O-β-D-葡糖苷(I)、异高黄芩素-4′-甲醚-8-O-α-L-阿拉伯糖基(1→4)-β-D-葡糖苷(II)、异高黄芩素-4′，7-二甲醚-8-O-α-L-阿拉伯糖基(1→4)-β-D-葡糖苷(III)。化合物I，II，III均为新化合物。     

胡芦巴皂苷VIII的结构鉴定

目的　研究中国产胡芦巴Trigonellafoenum graecumL .种子的化学成分。方法　采用硅胶色谱柱进行分离,通过物理、化学和光谱学方法鉴定化合物的结构。结果　分离得到一甾体皂苷,命名为胡芦巴皂苷VIII,鉴定其结构为26-O-β-D-吡喃葡糖基-25(R)-5α-呋甾烷-20(22)-烯-2α,3β,26-三醇-3-O-β-D-吡喃木糖基(1→6)-β-D-吡喃葡糖苷。结论　胡芦巴皂苷VIII为新化合物。     

Chemical constituents from the roots of Biondia chinensis

Two new triterpenoid saponins, biondianosides F and G, together with 13 known compounds, were isolated from the ethanolic extract of the roots of Biondiachinensis Schltr. (Asclepiadaceae). Their structures were characterized as 3-O-beta-D-glucopyranosyl-2alpha,3beta-dihydroxyurs-12-en-28-oic acid-beta-D-glucopyranosyl-(1-->2)-[beta-D-glucopyranosyl-(1-->6)]-beta-D-glucopyranosyl ester (biondianoside F) and 3-O-beta-D-glucopyranosyl-2alpha,3beta,23-trihydroxyolean-12-en-28-oic acid-beta-D-glucopyranosyl-(1-->2)-beta-D-glucopyranosyl ester (biondianoside G) by spectral and chemical evidence.     

Lupane-triterpenes from the leaves ofBrassaiopsis glomerulata

Three known lupane-triterpenes, 3alpha-hydroxy-lup-20(29)-en-23,28-dioic acid (1), 3a-hydroxylup-20(29)-en-23,28-dioic acid 28-O-alpha-L-rhamnopyranosyl-(1-->4)-beta-D-glucopyranosyl-(1-->6)-beta-D-glucopyranosyl ester (acankoreoside A, 2) and 3alpha,11alpha-dihydroxy-23-oxo-lup-20(29)-en-28-oic acid (3) were isolated from the leaves of Brassaiopsis glomerulata (Blume) Regel, a species of Araliaceae family growing in Vietnam. Their structures were determined on the basis of spectroscopic data.     

Bioactive triterpenoids from Symplocos chinensis

A new triterpenoid, 2beta,3beta,19alpha,24-tetrahydroxy-23-norurs-12-en-28-oic acid (4), together with three known triterpenoids 3-oxo-19alpha,23,24-trihydroxyurs-12-en-28-oic acid (1), 2alpha,3beta,19alpha,23-tetrahydroxyurs-12-en-28-oic acid (2), 2alpha,3alpha,19alpha,23-tetrahydroxyurs-12-en-28-oic acid (3), was isolated from the roots of Symplocos chinensis. The new triterpenoid shows significant cytotoxic activity against B16 and BGC-823 cells.     

A New 24-nor-lupane-glycoside ofAcanthopanax trifoliatus

A new 24-nor-lupaneglycoside was isolated from the leaves of Acanthopanax trifoliatus. Based on spectroscopic data its chemical structure was determined as 24-nor-11alpha-hydroxy-3-oxo-lup-20(29)-en-28-oic acid 28-O-alpha-L-rhamnopyranosyl-(1 --> 4)-beta-D-glucopyranosyl-(1 --> 6)-beta-D-glucopyranosyl ester.     

野木瓜甙YM10和YM12的结构

从野木瓜(Stauntonia chinensis DC.)中分离得到二个去甲五环三萜皂甙化合物,经化学和光谱分析,分别鉴定为3-O-α-L-吡喃鼠李糖-(1→2)-α-L-吡喃阿拉伯糖-30去甲齐墩果-12,20(29)-二烯-28-羧酸-28-O-α-L-呲喃鼠李糖-(1→4-β-D-吡喃葡萄糖-(1→6)-β-D-吡喃葡萄糖酯,命名为野术瓜甙YM10(Ⅰ)和3-O-α-L-呲喃鼠李糖-(1→2)-α-L-吡喃阿拉伯糖-30-去甲齐墩果-12,20(29)-二烯-28-羧酸-28-O-β-D-吡喃葡萄糖-(1→6)-β-D-吡喃葡萄糖酯,命名为野木瓜甙YM₁₂(Ⅱ)。Ⅰ和Ⅱ均系首次从植物中得到的新化合物。     

A new lupane-triterpene glycoside from the leaves of Acanthopanax gracilistylus

A new and two known lupane-triterpene glycosides were isolated from the hot MeOH fraction of the leaves of Acanthopanax gracilistylus W. W. Smith. Based on the physical properties and spectroscopic data, their chemical structures were determined as acankoreoside A (1), acankoreoside D (2), and 3alpha-hydroxy-lup-23-al-20(29)-en-28-oic acid 28-O-alpha-L-rhamnopyranosyl-(1-->4)-beta-D-glucopyranosyl-(1-->6)-beta-D-glucopyranosyl ester (3), respectively. To our best knowledge, compound 3 appears to be novel, which was named as wujiapioside A.     

New polyhydroxylated triterpenes and anti-inflammatory activity of Salvia hierosolymitana

Salvia hierosolymitana (Lamiaceae) leaves were investigated for their topical anti-inflammatory properties following a bioassay-guided fractionation. The chloroform extract showed a strong inhibition of the Croton oil-induced ear oedema in mice, comparable to that of indomethacin. Phytochemical and pharmacological investigations of this extract led to the isolation of eight anti-inflammatory polyhydroxylated triterpenes of the ursane and oleanane series. Four of them are new compounds, whose structures were elucidated by NMR and mass spectroscopy as 3beta, 6alpha,23-trihydroxyurs-12,19(29)-dien-28-oic acid, 23-( TRANS-P-coumaroyloxy)-3beta, 6alpha,30-trihydroxyurs-12-en-28-oic acid, 2alpha,3beta-dihydroxyolean-28-oic acid and 24-nor-2alpha,3beta-dihydroxyolean-4(23),12-ene.     

Triterpenoid saponins from Stauntonia chinensis

A new triterpenoid saponin, named stauntoside A (1) along with four known saponins (2,3,4,5) was isolated from Stauntonia chinensis DC., (Lardizabalaceae). Their structures were elucidated by spectroscopic analysis and chemical methods as 3-O-alpha-L-arabinopyranosyl-30-norhederagenin -28-O-beta-D-glucopyranosyl-(1 --> 6)-beta-D-glucopyranosyl ester (1), 3-O-alpha-L-arabinopyranosyl-30- norhederagenin-28-O-alpha-L-rhamnopyranosyl-(1 --> 4)-beta-D-glucopyranosyl-(1 --> 6)-beta-D-glucopyranosyl ester (2), 3-O-alpha-L-rhamnopyranosyl-(1 --> 2)-alpha-L-arabinopyranosyl-30-norhederagenin-28-O-alpha-L- rhamnopyranosyl-(1 --> 4)-beta-D-glucopyranosyl-(1 --> 6)-beta-D-glucopyranosyl ester (3), 3-O-alpha-L- arabinopyranosyl-hederagenin-28-O-alpha-L-rhamnopyranosyl-(1 --> 4)-beta-D-glucopyranosyl-(1 --> 6)-beta-D- glucopyranosyl ester (4), 3-O-alpha-L-rhamnopyranosyl-(1 --> 2)-alpha-L-arabinopyranosyl-hederagenin -28-O-alpha-L-rhamnopyranosyl-(1 --> 4)-beta-D-glucopyranosyl-(1 --> 6)-beta-D-glucopyranosyl ester (5). The (1)H and (13)C NMR data for Glycoside L-G1 or Sinofoside A are paradox in the reported before. Thus, the structure elucidation of saponin 2, known as Glycoside L-G1 or Sinofoside A, was discussed and the unambiguous assignments were given.     

Triterpenoids from the Flower of Campsis grandiflora K. Schum. as Human Acyl-CoA: Cholesterol Acyltransferase Inhibitors

The flower of Campsis grandiflora K. Schum. was extracted with 80% aqueous MeOH, and the concentrated extract was partitioned with EtOAc, n-BuOH and H2O. From the EtOAc fraction, seven triterpenoids were isolated through the repeated silica gel, ODS column chromatographies and preparative HPLC. From the result of physico-chemical data including NMR, MS and IR, the chemical structures of the compounds were determined as 3beta-hydroxyolean-12-en-28-oic acid (oleanolic acid, 1), 3beta-hydroxyurs-12-en-28-oic acid (ursolic acid, 2), 3beta-hydroxyurs-12-en-28-al (ursolic aldehyde, 3), 2alpha,3beta-dihydroxyolean-12-en-28-oic acid (maslinic acid, 4), 2alpha,3beta-dihydroxyurs-12-en-28-oic acid (corosolic acid, 5), 3beta,23-dihydroxyurs-12-en-28-oic acid (23-hydroxyursolic acid, 6) and 2alpha,3beta,23-trihydroxyolean-12-en-28-oic acid (arjunolic acid, 7). These teriterpenoids were isolated for the first time from this plant. Also, compounds 4, 5, 6, and 7 revealed relatively high hACAT-1 inhibitory activity with the value of 46.2+/-1.1, 46.7+/-0.9, 41.5+/-1.3 and 60.8+/-1.1% at the concentration of 100 microg/mL, respectively.     

Triterpenes from Astilbe chinensis

Six new triterpenes, 3β,6β-dihydroxyurs-12-en-27-oic acid (1), 3β,6β,24-trihydroxyurs-12-en-27-oic acid (2), 3β,6β,7α-trihydroxyurs-12-en-27-oic acid (3), 3β-acetoxy-6β-hydroxyurs-12-en-27-oic acid (4), 3β,6β,24-trihydroxyolean-12-en-27-oic acid (5), and 3β,6β,7α-trihydroxyolean-12-en-27-oic acid (6), were isolated from the rhizomes of Astilbe chinensis. Their structures were elucidated on the basis of 1D- and 2D-NMR analyses and HR-MS experiments. The isolated compounds exhibited significant cytotoxic activities against the SK-N-SH and HL-60 cell lines.