羽叶鬼灯檠中的单萜二糖苷

从羽叶鬼灯檠 (RodgersiapinnataFranch .)的根茎中分离得到 6个单萜二糖苷 ,它们的结构通过波谱方法分别鉴定为 :(E ) 3,7 dimethyl 1 O [α L rhamnopyranosyl (1→ 6 ) β D glu copyranosyl] oct 2 en 7 ol (1) ,(E ) 3,7 dimethyl 1 O [α L arabinofuranosyl (1→ 6 ) β D glucopy ranosyl] oct 2 en 7 ol (2 ) ,geranyl 1 O α L arabinofuranosyl (1→ 6 ) β D glucopyranoside (3) ,gera nyl 1 O α L rhamnopyranosyl (1→ 6 ) β D glucopyranoside (4 ) ,geranyl 1 O β D xylopyranosyl (1→6 ) β D glucopyranoside (5 ) ,geranyl 1 O α L arabinopyranosyl (1→ 6 ) β D glucopyranoside (6 )。其中化合物 1为新化合物 ,单萜二糖苷类化合物系首次在该属中发现。     

Triterpenoid saponins from Hydrocotyle bonariensis Lam

Phytochemical investigation of the under-ground parts of Hydrocotyle bonariensis led to the isolation of five oleanane-type triterpenoid saponins, 3-O-{β-D-glucopyranosyl-(1 → 2)-[α-L-arabinopyranosyl-(1 → 3)]-β-D-glucuronopyranosyl}-21-O-(2-methylbutyroyl)-22-O-acetyl-R(1)-barrigenol, 3-O-{β-D-glucopyranosyl-(1 → 2)-[α-L-arabinopyranosyl-(1 → 3)]-β-D-glucuronopyranosyl}-21-O-(2-methylbutyroyl)-28-O-acetyl-R(1)-barrigenol, 3-O-{β-D-glucopyranosyl-(1 → 2)-[α-L-arabinopyranosyl-(1 → 3)]-β-D-glucuronopyranosyl}-21-O-acetyl-R(1)-barrigenol, 3-O-{β-D-glucopyranosyl-(1 → 2)-[α-L-arabinopyranosyl-(1 → 3)]-β-D-glucuronopyranosyl}-R(1)-barrigenol, and 3-O-{β-D-glucopyranosyl-(1 → 2)-[α-L-arabinopyranosyl-(1 → 3)]-β-D-glucuronopyranosyl}-22-O-(2-methylbutyroyl)-A(1)-barrigenol, together with the known saniculoside-R1. Their structures were established by 2D NMR techniques and mass spectrometry. Six compounds were evaluated against two human colon cancer cell lines, HCT 116 and HT-29. Two compounds showed weak cytotoxicity with IC(50) 24.1 and 24.0, 83.0 and 83.6 μM against HT-29 and HCT 116, respectively.     

Isolation and Indentification of Protosaponins from Fresh Rhizomes of Dioscorea zingiberensis Wright

Five steroidal chemical compounds were isolated from the fresh rhizomes of Dioseorea zingiberensis Wright gathered from Sichuan Province. Their chem ieal structures have been elucidated as diosgenin palmitate [Ⅰ]; β-sitosterol [Ⅱ]; gra- cillin [Ⅲ]; protogracillin [Ⅳ] and 3-O-{α-L-rhamnopyranosyl (1→3)-[β-D-glucopy- ranosyl (1→2)]-β-D-glucopyranosyl}-26-O-{β-D-glucopyranosyl}-diosgenin [Ⅴ]. [Ⅴ]is a new steroidal saponin, named protozingiberensissaponin.     

Isolation and Identification of Steroidal Saponins from Dioscorea panthaica Prain et Burkill

Two steroidal saponins have been isolated from the rhizomes of Dioscorea panthaica Prain et Burkill. collected from Sichuan province. They were identified as 3-0-{α-L- rhamnopyranosyl (1→4)- [α-L-rhamnopyranosyl (1→2) ]-β-D-glucopyranosyl } -diosgenin (dioscin) and 3-O-{β-D-glucopyranosyl (1→3)-[α-L-rhamnopyranosyl (1→2)]-β-D-glucopyranosyl}-diosgenin (gracillin) on the basis of mp., m. mp., TLC. acetylation, acid hydrolysis, IR, MS, and 13C NMR.     

西南远志中皂苷类成分的分离与鉴定

采用乙醇回流提取,通过硅胶柱、HPD100大孔树脂、Sephadex LH-20、半制备HPLC分离方法,运用现代谱学方法从西南远志中分离并鉴定了4个齐墩果酸型皂苷类化合物,均为顺反异构体,所用实验方法并不能有效分开。他们分别是:(E/Z)-PolygalasaponinXLIV(1),3-O-β-D-glucopyranosyl presenegenin 28-O-β-D-galactopyr-anosyl-(1→4)-β-D-xylopyranosyl-(1→4)-α-L-rhamnopyranosyl-(1→2)-[6-O-acetyl-β-D-glucopyranosyl-(1→3)]-{4-O-([E/Z)-3,4-dimethoxycinnamoyl}]-β-D-fucopyranosyl ester(2),(E/Z)-PolygalasaponinXXX(3)(,E/Z)-senegasaponin C(4),均为首次从该种植物中分离得到。     

Anti-diabetic effects of a kaempferol glycoside-rich fraction from unripe soybean (Edamame, Glycine max L. Merrill. 'Jindai') leaves on KK-A(y) mice

The anti-diabetic effects of a kaempferol glycoside-rich fraction (KG) prepared from leaves of unripe Jindai soybean (Edamame) and kaempferol, an aglycone of kaempferol glycoside, were determined in genetically type 2 diabetic KK-A(y) mice. The hemoglobin A(?c) level was decreased and tended to be decreased by respectively feeding KG and kaempferol (K). The area under the curve (AUC) in the oral glucose tolerance test (OGTT) tended to be decreased by feeding K and KG. The liver triglyceride level and fatty acid synthase activity were both decreased in the mice fed with KG and K when compared to those parameters in the control mice. These results suggest that KG and K would be useful to improve the diabetes condition. The major flavonoids in KG were identified as kaempferol 3-O-β-D-glucopyranosyl(1→2)-O-[α-L-rhamnopyranosyl(1→6)]-β-D-galactopyranoside, kaempferol 3-O-β-D-glucopyranosyl(1→2)-O-[α-L-rhamnopyranosyl(1→6)]-β-D-glucopyranoside, kaempferol 3-O-β-D-(2-O-β-D-glucopyranosyl) galactopyranoside and kaempferol 3-O-β-D-(2,6-di-O-α-L-rhamnopyranosyl) galactopyronoside, suggesting that these compounds or some of them may be concerned with mitigation of diabetes.     

牛心朴子须根的化学成分研究

从采自宁夏的萝摩科鹅绒藤属植物牛心朴子 (CynanchumkomaroviiAl.Iljinski.)须根的乙醇提取物中分离鉴定了十个非C2 1 甾体类化合物 :β D 呋喃果糖基 (2→ 1) α D [6 O 芥子酰基 ] 吡喃葡萄糖甙 (1) ,β D (3 O 芥子酰基 ) 呋喃果糖基 (2→ 1) α D [6 O 芥子酰基 ] 吡喃葡萄糖甙 (2 ) ,[6 O β D 吡喃葡萄糖基 (1→ 6 ) β D 吡喃葡萄糖基 1,2 双氧 (4 羟基 3,5 二甲氧基肉桂酰 ) (3) ,7 脱甲氧基娃儿藤碱 (4) ,9 羟基 芳樟醇 3 O β D 吡喃木糖基 (1→ 6 ) β D 吡喃葡萄糖甙 (5 ) ,(2E ,6R) 2 ,6 二甲基 2 ,7 辛二烯 1,6 二醇 (6 ) ,[(+) 丁香素 ](7) ,4′ O demethylepiyangambin(8) ,4′ 羟基 2′ 甲氧基苯乙酮 (9) ,(2S ,3S ,4R ,12E) N [2′ (R) 羟基二十二碳烷基 ] 1,3,4 三羟基 2 酰胺 二十碳烷基 12 烯 (10 )。除化合物 4和 9外 ,其余化合物均为首次从该植物中分离得到。     

金铁锁的新三萜皂甙

从金铁锁（Psammosilene tunicoides W.C.Wu et C.Y.Wu)根部分离得到5个齐墩果烷型五环三萜皂苷,它们的结构通过波谱和化学方法分别鉴定为：3-O-β-D-galactopyranosyl-(1→2)-β-D-glucuronopyranosyl-gypsogenin(1),3-O-β-D-galactopyranosyl-(1→2)-[β-D-galactopyranosyl-(1→3)-β-D-glucuronopyranosyl-gypsogenin(2),3-O-β-D-galactopyranosyl-(1→2)-β-D-glucuronopyra-nosyl-gypsogenin-28-O-β-D-xylopyranosyl-(1→4)-[β-D-glucopyranosyl-(1→3)]-α-L-rhamnopyranosyl(1→2)-β-D-fucopyranoside(LobatosideI,3),3-O-β-D-galactopyranosyl-(1→2)-[β-D-xylopyranosyl-(1→3)-β-D-glucuronopyranosylgypsogenin-28-O-β-D-xylopyranosyl-(1→4)-[β-D-glucopyranosyl-(1→3)]-α-L-rhamnopyranosyl(1→2)-β-D-fucopyranoside(4),3-O-β-D-galactopyranosyl-(1→）-β-D-glucuro-nopyranosyl-grpsogenin-28-O-β-D-xylopyranosyl-(1→4)-[β-D-6-O-acetylglucopyranosyl-(1→3)-β-D-glucuro-nopyranosyl-gypsogenin-28-O-β-D-xylopyranosyl-(1→4)-[β-D-6-O-acetylglucopyranosyl-(1→3)]-α-L-rh-amnopyranosyl(1→2)-β-D-fucopyranoside(5),其中5为新化合物,1和2为首次从自然界中分离得到。     

Isolation and Indentification of Steroidal Saponins from Dioscorea zingiberensis Wright

Four known steroidal compounds were isolated from the rhizomes of Dioscorea zingiberensis Wright gathered from Hubei Province. Their structures were identified by means of spectroscopic analyses as Epi-smilagenin[Ⅰ]; 3-O-(β-D glucopyranosyl) diosgenin[Ⅱ]; 3-O-[β-D-glucopyranosyl (1→ 4)-β-D-glucopyranosyl-diosgenin[Ⅲ]; 3-O {β-D glucopyranosyl (1→ 3)-[α-L-rhamnopyranosyl (1 →2)]-β-D glucopyranosyl} diosgenin [Ⅳ].     

马槟榔甜味蛋白的研究Ⅱ．甜蛋白Ⅱ和甜蛋白Ⅰ的比较

从马槟榔（Capparis masaikai Levl．）种子分离鉴定了二种甜蛋白：甜蛋白I（mabinlinⅠ或MaⅠ）分子量MWll600,等电点PⅠll.8;甜蛋白Ⅱ（mabinlinⅡ或MaⅡ）MW 10400,PⅠll.3。另一组分mabinlinⅡ MW10200,pl 11.8,可能是提取过程产物。MaⅡ有84个氨基酸残基,比MaⅠ少15个。它们有80个氨基酸残基是共同的,都是缺丝氨酸和蛋氨酸的单一多肽链。MaⅠ还缺赖氨酸和酪氨酸。测不出有自由SH基。在8 M尿素中用巯基乙醇还原处理,两种甜蛋白分子都可转变为二聚体而失去甜味。     

黄花远志的新齐墩果烷型三萜皂甙

从云南产远志科药用植物黄花远志(PolygalaarillataBuchHamexDDon)茎皮的乙醇提取物中分离得到4个新的齐墩果烷型三萜皂甙,命名为黄花远志皂甙(arillatanoside)A～D。同时还分离得到1个已知的三萜皂甙远志甙(polygalasaponin)XXXV。它们的结构通过波谱方法推定。     

Tea catechins and flavonoids from the leaves of Camellia sinensis inhibit yeast alcohol dehydrogenase

Four new quercetin acylglycosides, designated camelliquercetisides A-D, quercetin 3-O-[α-L-arabinopyranosyl(1→3)][2-O″-(E)-p-coumaroyl][β-D-glucopyranosyl(1→3)-α-L-rhamnopyranosyl(1→6)]-β-D-glucoside (17), quercetin 3-O-[2-O″-(E)-p-coumaroyl][β-D-glucopyranosyl(1→3)-α-L-rhamnopyranosyl(1→6)]-β-D-glucoside (18), quercetin 3-O-[α-L-arabinopyranosyl(1→3)][2-O″-(E)-p-coumaroyl][α-L-rhamnopyranosyl(1→6)]-β-d-glucoside (19), and quercetin 3-O-[2-O″-(E)-p-coumaroyl][α-L-rhamnopyranosyl(1→6)]-β-D-glucoside (20), together with caffeine and known catechins, and flavonoids (1-16) were isolated from the leaves of Camellia sinensis. Their structures were determined by spectroscopic (1D and 2D NMR, IR, and HR-TOF-MS) and chemical methods. The catechins and flavonoidal glycosides exhibited yeast alcohol dehydrogenase (ADH) inhibitory activities in the range of IC(50) 8.0-70.3μM, and radical scavenging activities in the range of IC(50) 1.5-43.8 μM, measured by using the 1,1-diphenyl-2-picrylhydrazyl (DPPH) radical.     

New pregnane glycosides from Brucea javanica and their antifeedant activity

Three new pregnane glycosides, 3-O-β-D-glucopyranosyl-(1→2)-α-L-arabinopyranosyl-(20R)-pregn-5-ene-3β,20-diol (1), 3-O-α-L-arabinopyranosyl-(20R)-pregn-5-ene-3β,20-diol-20-O-β-D-glucopyranoside (2), 3-O-α-L-arabinopyranosyl-(20R)-pregn-5-ene-3β,20-diol-20-O-β-D-glucopyranosyl-(1→2)-β-D-glucopyranoside (3) were isolated along with four known compounds, 4-7, from the leaves and stems of Brucea javanica. Their structures were determined by detailed analyses of 1D- and 2D-NMR spectroscopic data. All of the compounds isolated from Brucea javanica were tested for the antifeedant activities against the larva of Pieris rapae. Compounds 1, 3, and 5 showed significant antifeedant activities after 72 h incubation.     

金铁锁的两个新三萜皂苷

从石竹科植物金铁锁(Psammosilene tunicoides W．C．Wu et C．Y．Wu)根部分离得到4个齐墩果酸型五环三萜皂苷。它们的结构通过波谱和化学方法分别鉴定为：3-O-β-D-galac-topyranosyl-(1→2 )-β-D-6-O-methylgtucuronopymnosyl-quillaic acid (1),3-O-β-D-galactopymnosyl-(1→2)-[β-D-xylopyranosyl-(1→3)]-β-D-gtucuronopyranosyl-quillaic acid (2),3-O-β-D-galactopyrano-syl-(1→2)-[β-D-xylopyranosyl-(1→3)]-β-D-6-O-methylgtucuronopyranosyl-quillaic acid(3),3-O-β-D-galactopymnosyl-(1→2)-[β-D-xylopyranosyl-(1→3)]-β-D-6-O-ethylgtucuronopyranosyl-quillaic acid(4)。其中1为木鳖子中发现的次甙,3和4为新化合物。     

被子植物系统发育研究的现状与展望

为植物界最大的类群—被子植物建立一个能真正反映植物的进化历史和系统发育（phylogeny）的分类系统一直是许多植物系统学家和进化学家所向往的。到目前为止,已经提出的被子植物分类系统至少有二十多个。问题在于这样的分类系统能否说已符合于系统发育的要求？要回答这个问题,首先必须弄清系统发育的真正含义是什么。     

慈溪麦冬甙A和B的结构

从浙江慈溪产中药麦冬（Ｏｐｈｉｏｐｏｇｏｎ ｊａｐｏｎｉｃｕｍ）中分离得到２个新的Ｃ２７甾体甙－－慈溪麦冬甙Ａ（２）和Ｂ（３）以及已知甙ｏｐｈｉｏｇｅｎｉｎ３－氧－α－Ｌ－鼠李糖吡喃基（１→２）「β－Ｄ－木糖吡喃基（１→３）」－β－Ｄ－葡萄糖吡喃甙（２）和ｏｐｈｉｏｇｅｎｉｎ ３－氧－α－Ｌ－鼠李糖吡喃基（１→２）「β－Ｄ－木糖吡喃基（１→３）」「β－Ｄ－葡萄糖吡喃基（１→４）」－β－Ｄ－葡萄糖吡     

小花草玉梅化学成分研究

目的：研究银莲花属植物小花草玉梅的化学成分。方法：采用硅胶柱色谱,凝胶柱色谱,反相柱色谱并结合制备高效液相色谱等技术分离纯化单体化合物,并根据理化性质及光谱数据鉴定结构。结果：分离并鉴定了4个化合物,分别是常春藤皂苷元-28-O-β-D-吡喃葡萄糖酯苷（1）、3-O-β-D-吡喃葡萄糖-（1→2）-α-L-吡喃阿拉伯糖-齐墩果酸皂苷元-28-O-α-L-吡喃鼠李糖-（1→4）-β-D-吡喃葡萄糖-（1→6）-β-D-吡喃葡萄糖酯苷（2）、3-O-β-D-吡喃葡萄糖-（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-吡喃葡萄糖-（1→6）-β-D-吡喃葡萄糖酯苷（3）和3-O-β-D-吡喃核糖-（1→3）-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-吡喃葡萄糖-（1→6）-β-D-吡喃葡萄糖酯苷（4）。结论：化合物1为首次从银莲花属植物中分离得到,2-4为首次从小花草玉梅中分离得到。     

圆果雪胆中的皂甙成分

从圆果雪胆（Ｈｅｍｓｌｅｙａ ａｍａｂｉｌｉｓ）的块茎中分离到１０个化合物,其中３个雪胆皂甙是首次从该种植物中得到,它们的结构通过光谱和化学的方法鉴定为齐墩果酸－３－Ｏ－α－吡喃阿拉伯糖（１→３）－β－葡萄糖醛酸甙,２８－Ｏ－β－Ｄ－吡喃葡萄糖齐墩果酸３－Ｏ－α－吡喃阿拉伯糖（１→３）－β－Ｄ－葡萄糖醛酸,２８－Ｏ－β－Ｄ－吡喃葡萄糖齐墩果酸３－Ｏ－「β－Ｄ－吡喃葡萄糖（１→２）」－「α－吡喃阿     

大叶吊兰中一个新的甾体皂甙

从百合科植物大叶吊兰（Ｃｈｌｏｍｐｈｙｔｕｍ ｍａｌａｙｅｎｓｅ）根茎中分离得到１个新的呋甾烷型甾体皂甙,命名为大叶吊兰甙Ｅ（ｃｈｌｏｒｏｍａｌｏｓｉｄｅ Ｅ）。经波谱和化学方法证明明其结构为：２６－０－β－Ｄ－ｇｌｕｃｏｐｙｒａｎｏｓｙｌ－２２－ｈｙｄｒｏｘｙ－２５（Ｓ）－５ａ－ｆｕｒｏｓｔａｎ－１２－ｏｘｏ－３β,２６－ｄｉｏｌ－３－β－Ｄ－ｘｙｌｏｐｙｒａｎｏｓｙｌ（１→３）〖α－Ｌ－ａｒａ     

Study on the Structure of a New Triterpene Saponin B from Polygala japoniea Houtt

A new triterpene saponin B has been isolated from the earial parts of Polygala japonica Houtt in folk-lore medicine. Its molecular: C48H78O20, m.p. 199–202℃, [α]D23+30.0 (C, 0.5, CH3OH). Acidic hydrolysis of this saponin gave a sapogenin (2α, 3α, 24-tri-hydroxyolean-12-ene-28-oic acid) and D-glucose. The structure of saponin B was elucidated as 28-O- [β-D-glucopyranosyl (1→2) -β-D-glucopyranosyl (1→2) -β-D-glucopy- ranosyl] 2α, 3α, 24-trihydroxyolean-12-ene-28-oic acid mainly by 13C-NMR, MS and some chemical transfomations.