GC-MS分析九头狮子草挥发油的化学成分

采用水蒸气蒸馏法提取九头狮子草挥发油,利用 GC-MS 联用技术,结合化学计量方法对其化学成分进行定性和定量分析,用面积归一法测定各组分的相对质量分数.结果表明：九头狮子草中挥发油主要由植酮(19．82％)、丁香油酚甲醚(3．96％)、β-石竹烯(3．75％)、肉豆蔻醚(3．08％)、3-甲基-2-(3,7,11-三甲基十二烷基)呋喃(3．64％)、2-戊基呋喃(2．73％)和氧化石竹烯(2．69％)等51种成分组成,占总量的98．82％.     

以阿拉伯胶为主要壁材的九头狮子草红色素微胶囊化色素液稳定性的比较研究

本文研究了阿拉伯胶为主要壁材,阿拉伯与蔗糖为复翕才的九狮子草红色素的微囊化方法,并对微囊红色素液的物理和化学稳定性进行了探讨。结果表明,以要拉伯胶与蔗糖配比为２Ｌ：１８的微囊化色素液理化性质较稳定。为九了草红以纱应用于食品生产及微囊化技术中壁材的选择提供了理论依据。     

烟管头草的化学成分及其体外抗白血病活性研究

为研究烟管头草的化学成分及其对白血病细胞的体外抑制作用,该文采用硅胶柱层析、凝胶柱层析、大孔吸附树脂等方法对烟管头草(Carpesium cernuum)乙酸乙酯部位进行分离纯化,并运用¹H NMR、¹³C NMR和MS等波谱技术对化合物进行结构鉴定,采用MTT法测定化合物1-10对白血病细胞(K562、HEL)的体外抑制作用。结果表明:(1)从烟管头草乙酸乙酯部位共分离鉴定了11个化合物,分别为2, 9-epoxy-5, 9-dihydroxy-8-angeloyloxy-11-methoxymethyl-4(15)-germacraen-6, 12-olide(1)、cardivin D(2)、cernuumolide I(3)、cernuumolide J(4)、8-hydroxy-9, 10-diisobutyryloxythymol(5)、(2E, 6Z, 10E, 12R)-7-[(acetyloxy)methyl]-3, 11, 15-trimethylhexadeca-2, 6, 10, 14-tetraene-1, 12-diol(6)、9, 10-dihydroxyoctadecanoate(7)、1, 6-dihydroxy-8-hydroxymethyl-anthraquinone(8)、emodin(9)、4-megastigmen-3, 9-dione(10)、β-谷甾醇(11)。其中化合物1为新化合物,化合物5、7-10均为首次从天名精属中分离得到,化合物2、5-10均为首次从烟管头草中分离得到。(2)活性测试结果表明化合物cardivin D(2)、cernuumolide I(3)和cernuumolide J(4)对白血病细胞具有较好的体外抑制作用,其中对K562细胞的IC₅₀值分别为(2.27±0.46)、(5.53±0.41)、(3.90±0.80)μmol·L^-1,对HEL细胞的IC₅₀值分别为(1.84±0.14)、(2.36±0.90)、(2.31±1.17)μmol·L^-1。该研究结果丰富了烟管头草的化学成分,为抗白血病药物的研发提供了物质基础。     

驼绒藜化学成分研究

从驼绒藜(Ceratoides latens)乙醇提取物中分离得到9个化合物,经波谱分析将它们分别鉴定为香草酸(vanilic acid)(1),乙酰香子兰酮(acetovanillon)(2),三达右松脂-15-烯-8β,12β-二醇(sandaracopimar-15-en-8β,12β-diol)(3),5,7,3’,4’-四甲基槲皮素(5,7,3’,4’-tetramethyl quercitin)(4),小麦黄酮(tricin)(5),丁香亭3-O-β-D-葡萄糖苷(syringetin-3-O-β-D-glycopyranoside)(6),β-谷甾醇(β-sitosterol)(7),胡萝卜苷(daucosterol)(8)和豆甾醇(stigmasterol)(9)。这些化合物均为首次从该植物中分离得到。     

烟管头草的化学成分及其细胞毒活性CSCD

为研究烟管头草(Carpesium cernuum)的化学成分及其细胞毒活性,采用多种色谱分离技术从烟管头草的95%乙醇提取物的乙酸乙酯萃取物中分离得到10个化合物。通过现代波谱技术鉴定了它们的结构,分别为(5 Z)-6-[(acetyloxy)methyl]-2-oxo-2,10,14-trimethylhexadeca-5,13-diene-11α-ol(1)、(2 E,10 E)-1,12-dihydroxy-18-acetoxy-3,7,15-trimethylhexadeca-2,10,14-triene(2)、(2 E,6 Z,10 E,12 R)-7-[(acetyloxy)methyl]-3,11,15-trimethylhexadeca-2,6,10,14-tetraene-1,12-diol(3)、(2 E,6 Z,11 S,12 R)-3,7,11,15-tetramethylhexadeca-2,6,14-triene-7-[(acetyloxy)methyl]-1,12,19-triol(4)、plaunotol(5)、S-(+)-dehydrovomifoliol(6)、pubinernoid A(7)、豆甾醇(8)、aurantiamide acetate(9)、反式对羟基肉桂酸(10),其中化合物1为新化合物。采用MTT法对人乳腺癌细胞MDA-MB-231进行细胞毒活性,结果表明,化合物2有较强的细胞毒活性,其IC_(50)值为6.80μmol/L,化合物1、3和4有中等细胞毒活性。     

土壤干旱胁迫对九头狮子草和圆苞金足草幼苗形态和生理特性的影响

采用称重控水法控制土壤相对含水量分别为(85.0±2.5)％(对照)、(67.5±2.5)％(轻度干旱)、(50.0±2.5)％(中度干旱)和(32.5±2.5)％(重度干旱),对土壤干旱胁迫条件下九头狮子草[Peristrophe japonica (Thunb.)Bremek.]和圆苞金足草(Goldfussia pentstemonoides Nees)2年生苗的植株形态及生理特性变化进行了研究.结果表明:经土壤干旱胁迫处理30 d后供试2种植物的外部形态均有一定变化,其中九头狮子草主要变化为叶片失绿、变薄且萎蔫、枝条下垂;圆苞金足草主要变化为茎干倒伏、叶片变软且叶柄低垂.随土壤干旱胁迫程度的增加,供试2种植物叶片的自然饱和亏、临界饱和亏、需水程度、束缚水含量、束缚水与自由水的含量比值、脯氨酸含量和可溶性糖含量均呈逐渐增加的趋势且均高于对照,而自由水含量、最高水势、最低水势和可溶性蛋白质含量均逐渐降低且总体上低于对照.总体上看,在重度干旱胁迫条件下供试2种植物各生理特性均与对照有极显著或显著差异,而在轻度或中度干旱胁迫条件下部分指标与对照无显著差异.供试2种植物各生理指标的变化幅度有明显差异,在同一干旱胁迫条件下九头狮子草叶片的自然饱和亏、需水程度、自由水含量、最高水势和最低水势的降幅、脯氨酸含量和可溶性蛋白质含量的降幅均高于圆苞金足草,其临界饱和亏、束缚水含量、束缚水与自由水的含量比值和可溶性糖含量均低于圆苞金足草.综合分析结果表明:供试2种植物对土壤干旱胁迫均具有一定的耐性,但圆苞金足草具有更强的抵御干旱的生理机制.     

紫茎泽兰的化学成分初报

紫茎泽兰(Eupalorium adenophorum Spreng)原产中美墨西哥,现在滇南一带广泛分布,对林、牧业生产造成严重危害。其化学成分研究未见报道。 从紫茎泽兰的叶和花序中,分到九个单体,经详细的光谱解析和与标准品对照,其中五个成分的化学结构分别为:正三十二烷n-dotriacontane(1),β-谷甾醇β-sitosterol(2),豆甾醇stigmasterol(3),蒲公英醇棕榈酸酯taraxasteryl palmitate(4),蒲公英醇乙酸酯taraxastcryl acetate(5)。     

福建金线莲的化学成分研究Ⅲ

从福建金线莲(Anoectochilus roxburghii)乙醇提取物的己烷萃取部分分得3个化合物和-甾体混合物,三个化合物结构分别鉴定为Sorghumol(1),木栓酮(2)和棕榈酸(3),甾体混合物经EI-MS、ESI-MS／MS技术确定含有24-异丙烯基胆甾醇、开唇兰甾醇、β-谷甾醇、豆甾醇和菜油甾醇。所有化合物均为该植物首次报道,其中化合物1为首次从兰科植物中分得,并首次对其光谱数据进行了详细的分析,化合物2为从该属植物中首次分得。     

小花琉璃草化学成分的研究

从小花琉璃草(cynoglossum lanceolatym Forsk.)全草的石油醚提取物中分离到5个化合物,用波谱等方法鉴定为:十六碳酸甲酯(Hexadecanoic acid,methyl ester)、β-谷甾醇(β-sitosterol)、5α,豆甾烷-3,6-二酮(5α,stigmastane-3,6-dione)、6β-羟基-豆甾-4-烯-3酮(6-β-hydroxy-stigmasta-4-en-3-one)和胡萝卜甙(daucosterol)。     

石蝉草的脂溶性成分

为研究石蝉草(Peperomia dindygulensis Miq.)的脂溶性化学成允,通过溶剂萃取、硅胶柱色谱、重结晶分离纯化,从石蝉草乙醇提取物的氯仿萃取部位分离得到7个化合物,经光谱学数据鉴定为:peperomin A(1),peperomin D(2),surinone C(3),proetorione C(4),cepharanone B(5),正十八酸(6),豆甾醇(7).化合物5为首次从该属植物中分离得到,除化合物1和2,其余所有成分均为首次从该植物中分离得到.     

Chemical constituents of Chimaphila japonica Miq

A phytochemical study of the whole plants of Chimaphila japonica Miq. led to the isolation of 23 compounds, including ten triterpenoids (1–10), six flavonoids (11–16), two sterols (17 and 18), two quinonoids (19 and 20), one saccharide derivative (21), one phenolic glycoside (22), and one megastigmane glycoside (23). The structures of these isolated compounds were identified using NMR spectroscopy (¹H and ¹³C) by comparison with previously reported data. All compounds, except 19 and 22, were reported from C. japonica for the first time. Among them, 16 compounds (1–4, 6–9, 12, 13, 15, 16, 18, 20, 21, and 23) were reported from genus Chimaphila for the first time, while compounds 12, 16, and 23 were isolated from the Ericaceae family for the first time. The chemotaxonomic significance of the isolates was also discussed.     

枇杷叶的化学成分

枇杷叶系蔷薇科（Rosaceae）枇杷属植物枇杷[Eriobotrya japonica（Thunb．）Lindl．]的干燥叶,为常用中药,收载于历版《中华人民共和国药典》中。枇杷叶归肺、胃经,具清肺止咳、降逆止呕的作用,用于治疗肺热咳嗽、气逆喘气、胃热呕逆及烦热口渴之症状。目前,已经从枇杷叶中分离出三萜酸、黄酮类、多酚、倍半萜及其苷类等成分,对其药效的研究主要集中在三萜酸的抗炎心、降血糖和抗病毒活性等方面。     

Chemical constituents from the whole plant of Liparis japonica

A new lignanoid (1), together with six known lignanoids (2–7) and four known flavonoids (8–11), were isolated from the EtOAc extract of Liparis japonica. Their structures were determined by analyzing the HRESIMS, NMR, CD spectroscopic data, and comparing with the reported literatures. Among them, 1 was a new compound, 2–11 were first isolated from L. japonica and the genus of Liparis. The chemotaxonomic significance of these isolates was comprehensively discussed.     

Chemical constituents isolated from the roots and rhizomes of Smilacina japonica

Phytochemical investigation of the roots and rhizomes of Smilacina japonica A. Gray led to the isolation of 16 compounds, including six steroidal saponins (1-6), one amide (7), one fatty alcohol (8), one steroidal sapogenin (9), two flavones (10-11), one glycoside (12), one phenol (13), one aliphatic acid (14), and two sterols (15-16). All of these compounds were isolated for the first time from the roots and rhizomes of S. japonica while compounds 1-13 were identified for the first time from the genus Smilacina, of which compounds 9, 11, and 13 were isolated from the Liliaceae family for the first time. Furthermore, the isolation of compound 9 was reported for the first time in plants. Their structures were identified by spectroscopic methods and compared previously published data. The chemotaxonomic significance of these isolated compounds has also been discussed.     

Chemical constituents from Lonicera japonica flower buds and their anti-hepatoma and anti-HBV activities

Three new naturally occurring monoterpenoids, japopenoid A (1), japopenoid B (23) japopenoid C (24), and one new caffeoylquinic acid derivative (28), together with thirty-one known compounds (2–22, 25–27, 29–35), were isolated and identified from the flower buds of Lonicera japonica Thunb. Their structures were determined by extensive 1D and 2D NMR spectroscopic methods, high-resolution mass spectrometry, and the absolute configurations of 1, 23, 24 were determined by comparison of their electronic circular dichroism (ECD) spectrum with literature and theoretical calculation. Structurally, compound 1 is a monoterpenoid featured with an unusual tricyclic skeleton. All compounds (1–35) were evaluated for their cytotoxicities against human liver cancer cell lines (HepG 2 and SMMC-7721). Compound 12 exhibited the most potent activity with IC₅₀ values of 26.54 ± 1.95 and 8.72 ± 1.57 μg/ml against HepG 2 and SMMC-7721, and the IC₅₀ values of compound 13 were 26.54 ± 1.95 and 12.35 ± 1.43 μg/ml, respectively. Western blot results further proved that compound 13 induces hepatoma cell apoptosis via the intrinsic apoptosis pathway. In addition, most terpenoids showed inhibitory activity against HBsAg and HBeAg secretion, and HBV DNA replication. In particular, 25 μg/mlof compound 11 inhibits HBsAg and HBeAg secretion, and HBV DNA replication by 39.39 ± 5.25, 15.64 ± 1.25, and 16.13 ± 4.10% compared to the control (p < 0.05). These results indicated that L. japonica flower buds could be served as functional food for anti-hepatoma and anti-HBV activities.     

鸭儿芹根、茎、叶挥发油的化学成分

采用水蒸气蒸溜法提取其根、茎、叶中的挥发油,利用GC-MS联用仪对其化学成分进行分析,以归一化法计算各个化学成分的相对含量.鸭儿芹根挥发油中共分离出11个峰,鉴定出11种化合物,占总离子峰的98.61％,主要成分为α-芹子烯、γ-芹子烯等;茎中共分离出25个峰,鉴定出25种化合物,占总离子峰的100.00％,主要成分为...     

Chemical constituents of the root bark of Ulmus davidiana var. japonica and their potential biological activities

The root bark of Ulmus davidiana var. japonica (Ulmaceae), commonly known as yugeunpi, has been used as a traditional Korean medicine for the treatment of gastroenteric and inflammatory disorders. As part of continuing projects to discover bioactive natural products from traditional medicinal plants with pharmacological potential, phytochemical investigation of the root bark of this plant was carried out. This led to the successful isolation of a new chromane derivative (1) and 22 known compounds: catechin derivatives (2–5), megastigmane glycoside (6), dihydrochalcone glycosides (7 and 8), flavanone glycosides (9 and 10), coumarins (11 and 12), lignan derivatives (13–17), and phenolic compounds (18–23). The structure of the new compound (1) was determined with 1D and 2D NMR spectroscopy and HR-ESIMS, and its absolute configurations were achieved by chemical reactions and the gauge-including atomic orbital (GIAO) NMR chemical shifts calculations. All the isolated compounds were evaluated for their potential biological activities including neuro-protective, anti-neuroinflammatory, and anti-Helicobacter pylori activities. Among the isolates, compounds 1, 8, and 20 displayed stronger potency by causing a greater increase in the production and the activity of nerve growth factor (NGF) in C6 glioma cells (147.04 ± 4.87, 206.27 ± 6.70, and 143.70 ± 0.88%, respectively), whereas compounds 11, 14, and 19 inhibited nitric oxide (NO) production in lipopolysaccharide (LPS)-stimulated murine microglial cells (IC₅₀ of 18.72, 12.31, and, 21.40 µM, respectively). In addition, compounds 1, 11, 18, and 20 showed anti-H. pylori activity with MIC values of 25 or 50 µM against two strains of H. pylori 51 and 43504. These findings provide scientific evidence that supports the traditional usage of U. davidiana var. japonica root bark in the treatment of gastroenteric and inflammatory disorders.     

蔓生百部的化学成分研究

从蔓生百部(Stemona japonica)根中分离得到13个化合物,通过波谱数据,它们鉴定为β-谷甾醇(1)、豆甾醇(2)、5,11-豆甾二烯-3β-醇(3)、苯甲酸(4)、4-甲氧基苯甲酸(5)、1,8-二羟基-3-甲基蒽醌(6)、1,8-二羟基-6-甲氧基-3-甲基蒽醌(7)、氧代狭叶百部碱(8)、百部定碱(9)、异狭叶百部碱(10)、绿原酸(11)、栀子苷(12)和藏红花素A(13).所有化合物均为首次从该植物中分离得到.     

苦荞粉中的化学成分

从荞麦属植物苦荞（Fagopyrum tataricum）的籽粒面粉中分离鉴定出9个化合物,其结构分别为：β-谷甾醇棕榈酸酯（1）,β-谷甾醇（2）,豆甾-4-烯-3,6-二酮（3）,胡萝卜甙（4）,尿嘧啶（5）,山萘酚-3-O-芸香糖甙（6）,芦丁（7）,山奈酚（8）和槲皮素（9）。除芦丁和槲皮素外,其余化合物均为首次从苦荞粉中分离得到。     

Sesquiterpene constituents from the liverwort Bazzania japonica

The hydrodistillation products of the liverwort Bazzania japonica were separated by preparative gas chromatography (GC) and investigated by spectroscopic methods. Seven unknown compounds were isolated and identified by GC-MS and NMR. Four of them, the norsesquiterpene hydrocarbons 4-epi-11-nor-aristola-1(10),11-diene (1), 4-epi-11-nor-aristola-1,9,11-triene (2), 4-epi-11-nor-aristola-9,11-diene (3), and one oxygenated sesquiterpene, (-)-aristol-1(10)-en-12-ol (5) are new natural compounds, and one, (+)-himachala-2,4-diene (7), has for the first time been isolated from liverworts. The absolute configurations of 5 and 7 were derived by chemical correlation reactions and/or enantioselective GC using cyclodextrin phases. 1, 2 and 3 have identical absolute configuration.