绞股蓝酮甙A的化学结构

自葫芦科(Cucurbitaceae)植物绞股蓝(Gynostemma pentaphyum (Thunb.)Makino)中分得一新天然化合物,命名为绞股蓝酮甙A(gypentonosideA),经理化分析及光谱(IR,MS,¹H-NMR,¹³C-NMR,2D-NMR)解析,其结构式如1所示。     

毛梗稀莶抗生育活性成分的研究

自菊科植物毛梗豨莶Siegesbeckia glabrescens Mak的全草中分得一个新的二萜甙,命名为豨莶新甙(neodarutoside),经光谱(IR,¹ HNMR,¹³ CNMR和MS)分析,确定结构为(I);同时分得的二萜有豨莶精醇(darutigenol,Ⅳ)和豨莶甙(d&rutoside,Ⅴ)。豨莶甙(Ⅴ)在20～40 mg/kg剂量时,对大鼠有明显抗早孕作用。     

伊贝母中伊贝碱甙C的分离和结构鉴定

自吉林栽培的伊贝母(Fritillaria pallidiflora Schrenk)中分得一种新的甾体生物碱甙,命名为伊贝碱甙C(yibeinosideC)。根据红外、质谱、氢谱、碳谱、¹H-¹HCOSY和¹H-¹³CCOSY谱确定其结构为22,26-环亚胺胆甾-6-酮-3-O-β-D-吡喃葡萄糖-(1→4)-β-D-吡喃半乳糖甙(1)。     

平贝碱乙的分离和鉴定

本文报道了自东北平贝母(Fritillaria ussuriensis Maxim)中分得一种新的甾体生物碱,经光谱(IR,MS,¹HNMR及¹³CNMR)解析和衍生物制备,推定其结构为5α,17β,22α-cevanine-3 β,6α,12α,14α,16β,20β-hexol,定名为平贝碱乙。     

香榧假种皮中的木脂素成分

目的研究香榧假种皮中的化学成分。方法采用色谱技术分离纯化,自85%乙醇提取物中分得3个木脂素化合物,应用光谱技术(IR,EI-MS,¹HNMR,¹³CNMR,DEPT,2D-NMR),确定了它们的化学结构。结果3个化合物分别为松脂素(I),二氢脱水二聚松柏醇(II),(7,8-cis-8,8′-trans)-2′,4′-二羟基-3,5-二甲氧基-落叶松脂素(III)。结论 以上化合物均为首次从该植物中分得,其中III为一新化合物。     

刺蒺藜果中一种新桂皮酰胺类成分的分离和鉴定

从刺蒺藜(Tribulus terrestris L)果实中分得两个化合物,经理化常数测定和光谱(UV,IR,¹HNMR,¹³CNMR,¹H-¹³CCOSY和MS)解析。化合物I鉴定为N-对羟基苯乙酮基-3-甲氧基-4-羟基取代桂皮酰胺,为一新化合物,命名为蒺藜酰胺(terrestriamide)。化合物II为8-甲基氢化茚酮-1,首次从该植物中获得。     

用二维核磁共振法研究肿足蕨碱的结构

从金星蕨科植物山东肿足蕨(Hypodematium sinense Iwatsuki)的全草分得一种新化合物,通过¹H-¹H COSY谱,¹H-¹³C COSY谱和远程¹H-¹³C COSY谱确定其结构是一种具有苯基取代苯并氮杂环辛四烯新型骨架的生物碱,命名为肿足蕨碱(hypodematine)(Ⅰ)。     

旱莲草化学成分旱莲甙A和旱莲甙B的分离和鉴定

自旱莲草(Eclipta alba(L.)Hassk)全草中分得4个三萜化合物,经理化常数测定和光谱(IR,MS,UV,¹HNMR,¹³CNMR和¹³C-¹HCOSY)解析,2个已知的三萜类化合物分别为刺囊酸(echinocysticacid,I)和齐墩果酸(oleanlicacid,II),另2个为新化合物,分别命名为旱莲甙A(eclip-tasaponinA,II)和旱莲甙B(ecliptasaponinB,IV)。I和II为首次从鳢肠属植物中获得。     

野菊花化学成分的研究

本文报告自菊科植物野菊(Chrysanthemum indicum L.)的头状花序中分得六种结晶性成分,经光谱(IR,UV,MS,¹H-NMR,¹³C-NMR)分析和衍生物制备证明五种为已知成分。胡萌卜甙、豚草素·金合欢素·1-单山萮酸甘油酯及棕榈酸。另一种为新倍半萜成分,命名为野菊花醇。并确定其化学结构。     

异落新妇甙的结构研究

从百合科菝葵属植物土茯苓(Smilaxg labra Roxb.)根茎的乙醇提取物中分得一个新的天然化合物(I),命名为异落新妇甙(isoastilbin)。根据元素分析,UV,IR,¹H-NMR,¹³C-NMR,2DNMR及FAB-MS,确定化合物I的结构为5,7,3',5'-四羟基二氢黄酮醇-3-O-α-L-鼠李糖甙。     

高良姜根茎中的一个新糖苷

目的对高良姜(Alpinia officinarum Hance)根中的糖苷类成分进行分离和结构鉴定。方法通过大孔树脂、聚酰胺和凝胶反复柱色谱分离得到糖苷类化合物;利用多种波谱技术鉴定其化学结构。结果分离鉴定了2个糖苷类化合物,其结构分别为4′-羟基-2′-甲氧基苯酚-β-D-{6-O-［(4″-羟基-3″,5″-二甲氧基)苯甲酸］}-吡喃葡糖苷(I)和正丁基-β-D-吡喃果糖苷(II)。结论化合物I为新化合物,命名为高良姜苷A,化合物II为首次从该属植物中分离得到。     

A new lignan glycoside from Eleutherococcus senticosus.

A new lignan glycoside, named eleutheroside E(2) (1), has been isolated from the roots of Eleutherococcus senticosus (known as "Siberian ginseng"), along with isomaltol 3-O-alpha-D-glucopyranoside (2), eleutherosides B, E and E(1), and thymidine. The structure of 1 was established by spectral interpretations as episyringaresinol 4"-O-beta-D-glucopyranoside. Compound 2 is described here for the first time as a naturally occurring compound.     

思茅藤甙类成分研究*

从思茅藤[Epigynun auritum(schneid.)Tsiang et P.T.Li]的茎皮中分离到胡萝卜甙(daucosterol)(Ⅰ)和一个新化合物(Ⅱ),命名为思茅藤甙(epigeoside)。经光谱分析和化学反应证明,Ⅱ的结构为儿茶素-3-O-α-L-鼠李吡喃糖(1→4)-β-D-葡萄吡喃糖(1→6)-β-D-葡萄吡喃糖甙[catechin-3-O-α-L-rhamnopyranosyl-(1→4)-β-D-glucopyranosyl-(1→6)-β-D-glucopyranoside]。     

Secoiridoids and Xanthones in the genus Centaurium

Overground parts of CENTAURIUM SPICATUM (L.) F RITSCH (Gentianaceae) from two different habitats have been investigated on their content of Secoiridoid glucosides. Sweroside (I), Swertiamarin (II) and gentiopicrin (III) (= gentiopicroside) have been identified. In plant material of C. SPICATUM from both habitats sweroside is the major compound. In plant material from one habitat gentiopicrin was found in almost equal amounts as sweroside. Swertiamarin is only present as a minor component. For the isolation of sweroside and gentiopicrin a preparative column chromatographic method using silica gel as adsorbent is described. The chromatographic analysis of these Secoiridoid glucosides has been carried out by means of newly elaborated TLC and HPLC separation systems. The composition of sweroside (I), swertiamarin (II) and gentiopicrin (III) in C. SPICATUM is compared with that occurring in C. PULCHELLUM (S W.) D RUCE and C. ERYTKRAEA R AFN. (= C. MINUS M OENCH). On the basis of chemical derivation, chromatographic (TLC and HPLC) and spectroscopical (IR, Mass) data it is shown that sweroside is very likely identical with the compound known as "kantaurin" in literature.     

A new 1,5-seco grayanotoxin from Rhododendron decorum

A new minor 1,5-seco-5-oxo-grayanotoxin named grayanotoxin XXI (1), together with three known grayanotoxins, grayanotoxins I, IV and VIII, has been isolated from the leaves of Rhododendron decorum (Ericaceae). The structure of the new compound (1) was determined on the basis of spectroscopic data.     

野八角果毒性成分的研究*

从野八角(Illicium simonsii Maxim.)的果实中分得三个化合物,经光谱分析并与标准品对照证明,结晶Ⅱ和Ⅲ分别为已知化合物莽草毒素(anisatin)和莽草酸(shikimic acid),另一个为新的毒性甚强的倍半萜内酯,命名为2-oxo-6-deoxyneoanisatin(Ⅰ)     

Note: A new 1,5-seco grayanotoxin from Rhododendron decorum

A new minor 1,5-seco-5-oxo-grayanotoxin named grayanotoxin XXI (1), together with three known grayanotoxins, grayanotoxins I, IV and VIII, has been isolated from the leaves of Rhododendron decorum (Ericaceae). The structure of the new compound (1) was determined on the basis of spectroscopic data.     

Chemical constituents from Astilbe chinensis

A new compound, 11-O-(3'-O-methylgalloyl)-bergenin (1), along with 11 known compounds (2-12), has been isolated from the rhizome of Astilbe chinensis. The chemical structure of compound 1 was determined by IR, MS, and NMR spectral data. All compounds were evaluated for the cytotoxic activity in vitro, and compound 4 showed a moderate cytotoxic activity against HepG2 cells.     

滇黄芩中滇黄芩新素的结构研究

前已报道自四川产滇黄芩Scutellaria,amoena C.H.Wright中分离出五种黄酮成分和从云南产的中得到另八个黄酮类化合物。本文继续报道从云南产滇黄芩中得到的六个化合物和从四川产本种植物中得到一个黄酮化合物的结构鉴定。     

A new isoflavone glucoside from Pterocarpus santalinus

A new isoflavone glucoside (1) together with the known santal has been isolated from the heartwood of Pterocarpus santalinus. Based on spectral methods, the structure of the new compound was elucidated as 4',5-dihydroxy 7-O-methyl isoflavone 3'-O-β-D-glucoside.