Two new secoiridoid glycosides from the roots of Picrorhiza scrophulariiflora

From the roots ofPicrorhiza scrophulariiflora, two new secoifidoid glycosides, named picrosecosides Ⅰ and Ⅱ （1, 2） have been isolated. Their structures were elucidated on the basis of chemical and spectropic evidences.

Minor secoiridoid aglycones from the low-polarity part of the traditional Chinese herb: Swertia mileensis

Eleven new secoiridoid aglycones involving unusual C9-skeleton:swerimilegenins A-F(1-6);bis-C9-skeleton:swerimilegenin G(7);and C_(10)-skeleton:swerimilegenins H−K(8−11),as well as six known ones,were isolated from the low-polarity part of the traditional Chinese herb medicine Swertia mileensis.Their structures were determined by extensive spectroscopic data and X-ray diffraction.Biogenetically,swerimilegenin A(1)belonged to 10-nor-secoiridoid,and swerimilegenins B-F(2-6)were 1-nor-secoiridoids.Erythrocentaurin(12)and gentiogenal(15)showed moderate anti-HBV activity on HepG 2.2.15 cell line in vitro.

A Fragmentation Study on Four Unusual Secoiridoid Trimers,Swerilactones H–K,by Electrospray Tandem Mass Spectrometry

Swerilactones H–K(1–4)as four unprecedented secoiridoid trimers represent a new type of natural product,which has attracted much interest of natural chemists due to their novel skeletons and promising bioactivity.In order to well understand their MS fragmentation behaviors,they were investigated by electrospray ionization ion-trap time-of-flight multistage product ion mass spectrometry(ESI-IT-TOF-MSn)for the first time.The protonated molecules([M?H]?)of swerilactones J and K,and deprotonated molecules([M-H]-)of swerilactones H,J and K were readily observed in the conventional single-stage mass spectra(MS);however only the[M?Cl]-ion for swerilactone I was obtained in negative mode.Based on the MSn study,the fragmentation pathways of swerilactones H and I in negative mode,and swerilactones J and K in both positive and negative modes were proposed.The neutral losses of H_(2)O,CO,CO_(2)and C_(2)H_(4)O moieties are the particular elimination from the precursor ions due to the presence of hydroxyl,d-lactone and 1-O-ethyl moieties in their structures,of which the retro-Diels–Alder cleavage was the most particular dissociation.The fragment ions at m/z 341 and 291 in negative mode can be considered as the diagnostic ions for secoiridoid trimers.This investigation will provide valuable information for their fast characterization from complicated natural mixtures and extensive understanding their structural architectures.

Two new phenylethanoid glycosides and a new secoiridoid glycoside from the roots of Picrorhiza scrophulariiflora

二新 phenylethanoid glycosides，命名 scroside H (1 ) ， scroside 我(2 ) ，并且新 secoiridoid glycoside，命名 picrogentioside 我(3 ) ，从地下被孤立 Picrorhiza scrophulariiflora 的部分。他们的结构根据分光镜的证据被阐明。

Two new secoiridoid glucosides from Syringa velutina Kom

山梅花 velutina Kom 的化学调查。导致了二新 secoiridoid 配糖物的隔离。他们的结构作为 6 &#x2032 被识别； -O-(6, 7-dihyrofoliamenthoyl )-8-epi-kingisidic 酸(syrveoside A， 1 ) 并且 6 &#x2032； -O-menthiafoloyl-8-epi-kingisidic 酸(syrveoside B， 2 ) 根据化学、物理化学的证据。

武都地区初榨橄榄油酚类和脂肪酸组成对油脂氧化稳定性研究

对武都地区的白橄榄(U)、恩帕特雷(E)、奇迹(K)、阿斯(As)、中山24(Z)、云台14(Y)、皮瓜尔(P)、豆果(Arbe)、小苹果(M)、鄂植8(Ez)、阿尔伯萨拉(Arbo)、科拉蒂(C)、莱星(L)、佛奥(F)这14个品种初榨橄榄油的脂肪酸、酚类成分及油脂氧化稳定性进行检测和分析,单因素方差分析表明:品种间多酚和脂肪酸含量及油脂氧化稳定性存在显著性差异(p<0.05)。所有分析样品的脂肪酸组成均符合欧盟特级初榨橄榄油标准,初榨橄榄油中油酸质量分数在(56.12±0.24)%(豆果)和(71.45±0.42)%(科拉蒂)之间,亚油酸质量分数在(5.73±0.06)%(皮瓜尔)和(15.80±0.05)%(阿斯)之间,棕榈酸质量分数在(12.67±0.12)%(科拉蒂)和(18.76±0.04)%(豆果)之间。裂环烯醚萜类是主要的酚类成分,总酚质量分数最高为奇迹,为(471.35±29.34)mg/kg,最低为豆果,仅(165.65±8.08)mg/kg。主成分分析表明:富含橄榄苦苷苷元、女贞子苷元、橄榄裂环烯醚萜、油酸、芹菜素的品种氧化稳定性越高,而富含棕榈酸、亚油酸、酪醇、羟基酪醇、刺激醛的品种氧化稳定性越低。基于芹菜素、橄榄裂环烯醚萜、木犀草素和亚油酸建立的多元线性逐步回归模型可以预测90.70%的油脂氧化稳定性变化(p<0.001)。

A New Secoiridoid Glycoside from Roots of Picrorhiza scrophulariiflora

Objective To study the chemical constituents in the roots of Picrorhiza scrophulariiflora.Methods The chemical constituents in the roots of P.scrophulariiflora were separated and purified with chromatographic methods.The structures were elucidated by spectroscopic methods and chemical analyses.Results A new secoiridoid glycoside,picrogentioside II(1) was successfully isolated from the roots of P.scrophulariiflora.Conclusion Compound 1 is a new secoiridoid glycoside.

Three new secoiridoid glycosides from the flower buds of Lonicera japonica

Three new secoiridoid glycosides,named lonijapoglycol A(1),aldosecolohanin C(2)and aldosecolohanin B(3),together with three known ones(4–6),have been isolated from the flower the buds of Lonicera japonica.All the structures were identified by spectroscopic analyses.Lonijapoglycol A(1)expressed significant anti-inflammatory activity to inhibit the release ofβ-glucuronidase induced by platelet-activating factor in rat polymorphonuclear leukocytes with an IC50 value of 3.76μmol·L^-1.

A New Secoiridoid Glycoside from Swertia cincta

Objective To study the chemical constituents of Swertia cincta. Methods Preparative liquid chromatography was employed. The structures of the compounds were elucidated by spectroscopic analysis. isolated from S. cincta and identified as Results Three secoiridoid glycosides were 8-methoxyl-eustomorusside （1）, secoiridoids eustomorusside （2）, and eustomoside （3）. Conclusion Compound 1 is a new secoiridoid glycoside. Compounds 2 and 3 are isolated from this plant for the first time.

Pharmacokinetic and Relative Bioavailability of Three Secoiridoid Glycosides in Beagle Dog Plasma After Oral Administration of Conventional and Enteric-Coated Capsules of Gentianella acuta Extract

Objective:To simultaneously investigate the pharmacokinetics of gentiopicroside,sweroside,and swertiamarin,which are constituents of Gentianella acuta,by developing and validating a simple,sensitive,and fast ultra-high-performance liquid chromatography–tandem mass spectrometry method.Materials and Methods:Blood samples were collected from the forward limb veins of six beagle dogs following oral gavage with G.acuta,the whole plant extract(39.90 mg/kg).Plasma samples were processed using liquid–liquid extraction.The analytes and paeoniflorin(internal standard[IS])were separated using an Acquity?UPLC ethylene bridged hybrid amide column(2.1 mm×100 mm,1.7μm)with isocratic elution using a mobile phase consisting of acetonitrile and 0.1%formic acid in water(80:20,v/v)at a flow rate of 0.4 mL/min.Quantification was performed using multiple reaction monitoring of the fragmentation transitions at m/z 401.1→179.0,403.1→195.0,419.1→179.0,and 525.2→449.1 for gentiopicroside,sweroside,swertiamarin,and the IS,respectively.Results:The linearity of the analytical response was good and the calibration curves were linear over concentration ranges of 1.20–192.0,0.40–159.0,and 0.20–209.3 ng/mL for gentiopicroside,sweroside,and swertiamarin,respectively.The extraction recovery was in the range of 84.72%–91.34%,84.58%–93.43%,and 82.75%–91.37%for gentiopicroside,sweroside,and swertiamarin,respectively.Conclusions:The method was successfully used to evaluate the pharmacokinetic parameters of gentiopicroside,sweroside,and swertiamarin in beagle dogs.

长梗喉毛花中3种化合物抗烟草花叶病毒活性分析及其对4种防御酶活性的影响

【目的】评价从长梗喉毛花[Comastoma pedunlulatum(Royle ex D.Don)Holub]中分离得到的3种化合物的抗烟草花叶病毒(Tobacco mosaic virus,TMV)活性及其对烟草4种防御酶活性的影响,为研发有效防治TMV的植物源农药提供先导化合物和理论依据。【方法】以心叶烟为试验材料,设化合物处理(当药黄素、高杯喉毛花内酯A和异荭草素)、空白对照(CK)和药剂对照(8%宁南霉素)处理,采用半叶枯斑法测定化合物对TMV侵染的预防保护和钝化作用;以普通烟草栽培品种K326为试验材料,设对照[空白对照(CK)和接种对照(CK+TMV)]、宁南霉素[药剂对照(PC)]、当药黄素、高杯喉毛花内酯A和异荭草素处理,利用防御酶检测试剂盒测定各处理烟草叶片中多酚氧化酶(PPO)、苯丙氨酸解氨酶(PAL)、超氧化物歧化酶(SOD)和过氧化物酶(POD)活性。【结果】先施用被试物后接种TMV,当药黄素、高杯喉毛花内酯A和异荭草素在100μg/mL时均减少TMV在心叶烟上的枯斑数目,对TMV的抑制率分别为50.05%、57.55%和61.73%,对TMV侵染均具有一定的预防保护作用,对照药剂宁南霉素对TMV的抑制率为47.75%;TMV与被试物溶液混合接种心叶烟时,当药黄素和高杯喉毛花内酯A对TMV的抑制率分别为51.65%和45.66%,对TMV侵染有较好的钝化作用。分别施用当药黄素、高杯喉毛花内酯A和异荭草素后,烟草叶片防御酶PPO活性分别在处理后24、12和24 h达最大值;PAL活性均在处理后72 h达最大值;POD活性分别在处理后24、48和72 h达最大值。PPO、PAL和POD活性在最大值时与CK均呈显著差异(P<0.05),而SOD活性在最大值时与CK无显著差异(P>0.05)。【结论】分离自长梗喉毛花的3种化合物当药黄素、高杯喉毛花内酯A和异荭草素使用浓度为100μg/mL时对TMV均有较好的预防保护活性,具有作为抗TMV植物源农药或先导化合物的潜力。

红直獐牙菜的苷类成分

目的 研究红直獐牙菜的苷类成分。方法 采用硅胶柱层析分离和 Sephadex L H2 0纯化 ,经理化性质和波谱分析鉴定其化学结构。结果 从红直獐牙菜的水溶性部分得到 7个化合物 ,他们分别为 8- O- β- D-吡喃葡萄糖 - 1,5 -二羟基 - 3 -甲氧基酮 ( )、8- O-β- D-吡喃葡萄糖 - 1,3 ,5 -三羟基酮 ( )、1- O-β- D-吡喃葡萄糖 - 3 ,7,8-三羟基酮 ( )、异荭草苷 ( )、落干酸 ( )、龙胆苦苷 ( )和 β-龙胆二糖 ( )。结论 化合物 、 、 和

小叶丁香化学成分的研究(Ⅰ)

目的 对小叶丁香 Syringa pubescens的化学成分进行研究。方法 采用硅胶柱色谱进行分离纯化 ,通过光谱分析鉴定其化学结构。结果 首次从小叶丁香的乙醇提取物中分得 4个化合物 ,并鉴定为橄榄苦苷 (oleuropein, )、10 -羟基橄榄苦苷 (10 - hydroxyoleuropein, ) ,oleoside- 11- m ethyl ester, 及 2 - (3,4 -二羟基苯基 )乙醇 [2 - (3,4 - dihydroxyphenyl) ethanol, ]。结论 4种化合物均为首次从该种植物中分得的裂环环烯醚萜苷类化合物。

中药女贞子中水溶性成分二种新裂环环烯醚萜甙的分离和鉴定

从木犀科植物女贞（ＬｉｇｕｓｔｒｕｍｌｕｃｉｄｕｍＡｉｔ）干燥成熟果实女贞子中分离得到２个新的裂环环烯醚萜甙类化合物，经光谱及化学分析，鉴定其化学结构，并分别命名为特女贞甙（ｓｐｅｃｎｕｅｚｈｅｎｉｄｅ，Ｉ）和女贞苦甙（ｎｕｅｚｈｅｎｇａｌａｓｉｄｅ，Ｉ）。

金银花中裂环环烯醚萜苷类化学成分研究

目的系统研究金银花Lonicera japonica水提物中的化学成分。方法利用D101、Sephadex LH-20、硅胶等各种柱色谱法进行分离纯化,通过波谱分析手段(IR、UV、NMR等)及化合物的理化性质进行结构鉴定。结果从金银花水提物中分离得到7个裂环环烯醚萜苷类化合物,分别为:vogeloside(Ⅰ)、7-epi-vogeloside(Ⅱ)、secologanicacid(Ⅲ)、sweroside(Ⅳ)、secoxyloganin(Ⅴ)、secologanoside(Ⅵ)、(E)-aldosecologanin(Ⅶ)。结论其中化合物Ⅲ和Ⅵ为首次从忍冬属植物中分离得到,化合物Ⅶ为迄今为止较为罕见的通过碳碳键相连的二聚体环烯醚萜苷。

抱茎獐牙菜中的苷类成分

目的 研究藏药抱茎獐牙菜Swertiafranchetiana中的苷类成分。 方法 用各种柱色谱方法进行分离纯化 ,根据理化性质和波谱解析鉴定其化学结构。结果 从抱茎獐牙菜的水溶性部分得到 11个化合物 ,分别鉴定为芒果苷 (mangiferin ,Ⅰ )、异荭草苷 (isoorientin ,Ⅱ )、当药黄素 (swertisin ,Ⅲ )、当药醇苷 (swertianolin ,Ⅳ )、1 羟基 3,5 二甲氧基酮 1 O [β D 吡喃木糖 (1→ 6 ) β D 吡喃葡萄糖 (Ⅴ )、1 羟基 3,7,8 三甲氧基酮 1 O β D 吡喃葡萄糖 (Ⅵ )、1 羟基 2 ,3,5 三甲氧基酮 1 O [β D 吡喃木糖 (1→ 6 ) β D 吡喃葡萄糖 (Ⅶ )、5 醛基 1 异色满酮 (Ⅷ )、獐牙菜苦苷 (swertiamarin ,Ⅸ )、龙胆苦苷 (gentipicroside ,Ⅹ )和獐牙菜苷 (sweroside ,Ⅺ )。 结论 化合物Ⅵ～Ⅺ均为首次从该植物中得到 。

印度獐牙菜的化学成分研究

目的研究印度獐牙菜Swertia chirayita全草的化学成分。方法采用硅胶柱层析进行分离纯化,通过波谱方法进行结构鉴定。结果分离纯化了13个已知化合物,分别鉴定为β-谷甾醇、齐墩果酸、间羟基苯甲酸、香草酸、norbellidifolin、bellidi-folin、norswertianolin、当药醇苷、龙胆苦苷、獐牙菜苷、deacetylcentapicrin、当药苦酯苷和獐牙菜苦苷。结论13个化合物均为首次从印象獐牙菜中得到。

迎春花叶抑菌活性物研究

采用硅胶柱层析(CC)、薄层层析(TLC)和重结晶等技术,从迎春花叶乙酸乙酯萃取物中分离到一强抑菌活性单体。经理化检测和波谱分析数据鉴定属裂环烯醚萜葡糖苷类(secoiridoid glucosides)的迎春花素(jasminin)。该单体在强酸性环境中不稳定,高温、紫外光处理后抑菌活性稳定,对金黄色葡萄球菌的最小抑菌浓度(MIC)为均为1mg/ml,对痢疾杆菌、大肠杆菌的最小抑菌浓度为0.5mg/ml,对三个受试菌的最小杀菌浓度(MBC)为2mg/ml。

金银花中一个新的裂环环烯醚萜苷(英文)

目的 :从金银花LonicerajaponicaThunb .中分离出活性成分环烯醚萜苷类化合物。方法 :金银花 70 %乙醇提取物依次用石油醚、乙酸乙酯和正丁醇提取 ,乙酸乙酯部位采用反复硅胶柱层析进行分离、纯化。通过波谱方法鉴定结构。结果 :分离得到一个新的裂环环烯醚萜苷 ,命名为dehydromorroniside。结论 :该化合物为忍冬属中发现的第 3个morro

女贞子酒蒸过程中4种裂环环烯醚萜苷类成分的动态变化

目的探讨女贞子酒蒸过程中4种裂环环烯醚萜苷类成分的动态变化规律。方法采用HPLC梯度洗脱的方法同时测定女贞子生品及酒蒸不同时间炮制品（4,8,12,16,20,24 h）中特女贞苷、橄榄苦苷、女贞苷G13、女贞苷的量。流动相为乙腈-0.1%甲酸溶液,梯度洗脱;柱温25℃;检测波长235 nm;体积流量1.0 m L/min。结果特女贞苷、橄榄苦苷、女贞苷G13、女贞苷依次在0.035 5-1.78μg、0.004 12-0.206μg、0.011 2-0.560μg、0.001 46-0.072 8μg范围内线性关系良好（r〉0.999 5）,平均回收率在97.7%-100.0%之间。在24 h之内,随着酒蒸时间的延长,4种苷类成分均呈现逐渐降低的趋势。结论炮制对女贞子中裂环环烯醚萜苷类成分含有量具有显著影响,女贞子酒蒸后特女贞苷、橄榄苦苷、女贞苷G13、女贞苷均产生质变。研究结果为揭示女贞子的炮制机理提供了实验依据。