Three new nortriterpenoids from Schisandra wilsoniana and their anti-HIV-1 activities

Three new highly oxygenated nortriterpenoids,wilsonianadilactones D-F(1-3),were isolated from the leaves and stems of Schisandra wilsoniana.Their structures were established by means of spectroscopic analysis.Compounds 1-3 showed weak anti-HIV-1 activity with the therapeutic index(TI)values(CC50/EC50)greater than 8.16,14.7,and 17.5,respectively.

Nortriterpenoids from the fruit stalk of Schisandra chinensis (Turcz.) Baill.

Objective:The fruit stalk of Schisandra chinensis(Turcz.)Baill.(S.chinensis)has been found to contain bioactive components similar to the fruit of S.chinensis.Here,we report a recent discovery about new nortriterpenoids with a novel skeleton and anti-gastric cancer activity,which were isolated from the fruit stalk of S.chinensis.Methods:The chemical components of ethyl acetate extract from 70%ethanol extract from S.chinensis fruit stalk were separated,purified,and identified by liquid chromatography methods(silica gel,ODS,HPLC)and extensive spectroscopic analyses(NMR,IR,UV,MS,CD).Results:Two new nortriterpenoids,schilancitrilactone M and 25-hydroxyl schindilactone D(1 and 2),along with ten known nortriterpenoids(3-12)were isolated from the fruit stalk of S.chinensis.The isolated compounds were tested for their cytotoxic activities against MGC-803 cells,and the results showed that compounds 6-8 possessed significant activities with IC50 of 9.01,11.77,and 2.74μmol/L,respectively.Conclusion:Twelve nortriterpenoids including two new compounds were isolated from the fruit stalk of S.chinensis for the first time.Among them,compounds 6-8 showed significant anti-gastric cancer activities.We postulated that the fruit stalk of S.chinensis could be used as an anti-gastric cancer drug.

A New Nortriterpenoid Glycoside from Sinofranchetia chinensis

A new 30-nortriterpenoid glycopside, 3-O-a-L-arabinopyranosyl-30-norhederagenin 28-O-a-L-rhamnopyranosyl(1-->4)-beta -D-glucopyranosyl (1-->6)-beta -D-glucopyranoside 1, named sinofoside A was isolated from Sinofranchetia chinensis. Its structure was elucidadated by spectra FAB-MS, 2D-NMR including H-1-H-1 COSY, H-1-C-13 COSY, TOSCY, HMBC and NOESY techniques.

A new cycloartane nortriterpenoid from Quercus variabilis Blume

The leaves and stems of Quercus variabilis Blume afforded a new cycloartane nortriterpenoid, 3α-acetyloxy-4α, 14α-dimethyl- 9β, 19-eycloergost-24-oic acid （1）, along with five known compounds （2-6）. The structure of 1 was elucidated by 1D and 2D NMR and mass spectroscopy. 2009 Qi Shi Sun. Published by Elsevier B.V. on behalf of Chinese Chemical Society. All rights reserved.

野木瓜属植物化学成分及其药理活性研究进展

木通科野木瓜属Stauntonia DC.植物主要含有五环三萜及其苷类、降甲基五环三萜及其苷类、苯丙素类以及黄酮类等化学成分。三萜皂苷类成分为其主要化学成分和活性成分,具有镇痛、抗炎、抗肿瘤、抗氧化等药理作用。野木瓜为该属主要研究的植物,临床上主要用于治疗三叉神经痛、坐骨神经痛、神经性头痛、风湿性关节痛等疾病。该文对野木瓜属植物的化学成分及药理活性进行综述,以期为后续研究开发该属植物提供参考。

空心莲子草中具杀灭钉螺活性皂甙成分的研究

从空心莲子草全草(Alternanthera philoxeroides)的水溶性部位分离鉴定出五个五环三萜及去甲三萜皂甙类成分(1～5).其中两个皂甙(2和5)显示出强的杀灭钉螺活性.化合物2～5为首次从该属植物中发现.

A Novel Hexanordammarane Glycoside from the Roots of Panax notoginseng

Notoginsenoside R-111, a novel hexanordammarane glycoside was isolated from the roots of Panax nototginseng, as a minor constituent. Its structure was determined as 6-O-(beta -D-glucopyranosyl)-3 beta ,6 alpha ,12 beta -trihydroxy-22,23,24,25,26,27-hexanordammaran-20-one(1), by means of spectroscopic methods.

华中五味子稀有降三萜成分及其与人血清白蛋白的相互作用(英文)

应用多种色谱技术从华中五味子中分离纯化出一个稀有降三萜成分schicagenin A,采用荧光淬灭技术和紫外光谱方法研究该化合物与人血清白蛋白的相互作用机制,两者的相互作用研究显示:静态淬灭机制参与其中,提示schicagenin A与人血清白蛋白结合形成了复合物;在schicagenin A与人血清白蛋白的结合过程中疏水作用起了主要驱动作用;人血清白蛋白的ⅡA亚域(位点I)是schicagenin A与之的结合位点.本研究为schicagenin A在人体内进一步的生物活性研究和基于该化合物的新药设计提供了参考数据.

中国南海软珊瑚化学成份研究N－B

从中国南海西沙群岛永胜岛所采集到的一种软珊瑚［ＮｅｐｈｔｈｅａＡｌｂｉｄａ（Ｈｏｌｍ）］中分离到结构新颖的降三萜（Ｎ─Ⅱ），分子式Ｃ２８Ｈ４８Ｏ４。熔点２３４～２３６℃，通过对它的ＩＲ，ＭＳ，１ＨＮＭＲ，１３ＣＮＭＲ及１３ＣＮＭＲＤＥＰＴ等波谱数据分析，结合生源理论，其结构确定为２９，３０─降二碳齐墩果烷─１３，１５，１６，２６─四醇。

中药灵芝降羊毛甾烷三萜类成分研究

研究灵芝Ganoderma lingzhi子实体的化学成分。采用正相硅胶、ODS、Sephadex LH-20凝胶柱色谱和prep-HPLC等方法分离与纯化,运用NMR、MS等波谱技术鉴定化合物结构。从灵芝95%乙醇提取物中分离得到5个降羊毛甾烷三萜类化合物,分别是ethyl 20(21)-dehydrolucidenate A(1)、lingzhi-20(21)-en-24-oic acid A(2)、20(21)-dehydrolucidenic acid A(3)、赤芝酮A(4)、lucidadone H(5)。化合物1和2是两个新的降羊毛甾烷三萜化合物;化合物3~5为首次从该属真菌中分离得到。化合物1和2在白血病(HL-60)、肺癌(A549)、肝癌(SMMC-7721)、乳腺癌(MCF-7)、结肠癌(SW480)五种不同的癌细胞株上进行细胞毒活性筛选,结果显示化合物1~5在40μM时无明显的细胞毒活性。

五味子科植物中降三萜类成分及其药理作用研究进展

降三萜类成分是一类结构新奇、高度氧化且骨架重排的三萜类化合物,是五味子科植物中常见的三萜类化合物之一,其主要具有抗HIV、抗肿瘤等药理作用。对五味子科植物中降三萜类成分的结构分类及药理活性方面的研究进展进行综述,为合理开发利用五味子科药用植物资源提供参考。

HPLC同时测定五味子提取物中的4种类三萜内酯类物质的含量

目的:研究了HPLC测定五味子提取物中de-hydroxy arisanlactone D,25-hydroxy schindilactone,schindilachone A,lancifodilactone D的含量的方法。方法:Waters Symmetry色谱柱(4.6 mm×250 mm,5μm),流动相为乙腈-水(33∶67),柱温37℃,流速1 mL.min-1,检测波长246 nm。结果:De-hydroxy arisanlactone D,25-hydroxy schindilactone,schindilachone A和lan-cifodilactone D的线性范围和(μg)加样回收率分别为0.075～1.800(98.57%),0.098～0.980(96.44%),0.095～0.950(97.96%),0.053～0.530(97.27%)。结论:该方法分离良好、精密准确、能用于五味子提取物中4种类三萜内酯类物质的定量分析。

接骨木中1个新的降三萜成分

目的研究接骨木Sambucus williamsii茎枝的化学成分。方法采用D-101大孔吸附树脂、硅胶、ODS、Sephadex LH-20、Toyopearl HW-40和RP-HPLC等色谱分离手段进行分离纯化,根据化合物的理化性质和波谱数据鉴定其结构。结果从接骨木茎枝60%乙醇提取物中分离得到6个化合物,分别鉴定为23-羟基-3-羰基-28-去甲基-12,16-二烯齐墩果烷(1)、3-羰基齐墩果酸(2)、齐墩果酸(3)、白桦酸(4)、棕榈酸(5)、正二十八醇(6)。结论化合物1为1个新的降三萜类化合物,命名为接骨木烷A;化合物2和6为首次从该植物中分离得到。

中药茺蔚子中一个新C-28降三萜

目的:研究益母草Leonurus japonicus果实茺蔚子中的化学成分。方法:茺蔚子乙酸乙酯部位经硅胶,RP-18,Sephadex LH-20和HPLC等色谱技术分离纯化,根据理化常数和波谱数据鉴定化合物的结构。结果:分离鉴定了2个具有特殊骨架的28位去甲基齐墩果烷型螺环三萜。结论:化合物1为新化合物,命名为茺蔚子三萜A(leonujaponin A),化合物2为已知化合物,鉴定为phlomistetraol B,均为首次从益母草属植物中分离得到。

Limonoids from seeds of Azadirachta indica A.Juss. and their cytotoxic activity

Four new limonoid-type nortriterpenoids, 1-detigloyl-1-O-methacryloylsalannin(1), 28-deoxo-2,3-dihydronimbolide(2), 12-acetoxy-3-O-acetyl-7-O-tigloylvilasinin(3) and 12-acetoxy-3-Oacetyl-7-O-methacryloylvilasinin(4), along with five known ones, were isolated from seeds of Azadirachta indica A. Juss. Their structures were elucidated by various spectroscopic methods, including UV, IR, MS, NMR, X-ray crystallography, quantum chemical calculation, as well as by comparison of their spectroscopic data with those reported. In the in vitro cytotoxic assay, 2 showed inhibitory activity against human breast cancer MDA-MB-231 cell line with IC_(50) value of 7.68±1.74 μmol/L, and 5 inhibited growth of human cervical cancer Hela cell line, melanoma A375 cell line and promyelocytic leukemia HL-60 cell line, with IC_(50) 12.00±2.08, 17.44±2.11, and 13.95±5.74 μmol/L, respectively.

藏药亚吉玛(长梗金腰)醋酸乙酯部位的化学成分研究

目的研究藏药亚吉玛(长梗金腰Chrysosplenium axillare)醋酸乙酯部位的化学成分。方法采用HP-20大孔吸附树脂、Sephadex LH-20凝胶等柱色谱以及制备高效液相技术进行化学成分分离,采用NMR和HR-ESI-MS等光谱方法进行化合物结构鉴定。结果分离得到17个高度氧化的黄酮醇衍生物及4个三萜类化合物,其结构分别鉴定为5,6,4’-三羟基-3,7,3’-三甲氧基黄酮-6-O-β-D-葡萄糖苷(1)、5,6,3’-三羟基-3,7,4’-三甲氧基黄酮-6-O-β-D-葡萄糖苷(2)、chrysosplenoside H(3)、5-O-demethylapulein (4)、5,3’-二羟基-3,6,7,4’-四甲氧基黄酮(5)、5,2’-二羟基-3,7,4’,5’-四甲氧基黄酮(6)、chrysosplenol C (7)、5,2’,5’-三羟基-3,7,4’-三甲氧基黄酮(8)、axillarin (9)、brickellin (10)、槲皮素(11)、芦丁(12)、isorientin (13)、chrysosplenosideE (14)、槲皮素3-O-β-D-葡萄糖苷(15)、5,6,3’,4’-四羟基-3,7-二甲氧基黄酮-6-O-β-D-葡萄糖苷(16)、tomentin(17)、β-peltobo1toykinolic acid(18)、3α,16α-二羟基-4,4,9,14-四甲基-(9β,10α)-19-去甲孕酮-5-烯-11,20-二酮(19)、3α,16α,20,25-四羟基-(10α)-葫芦素-5-烯-11,22-二酮(20)、6α,23α-环氧-3β,20β-二羟基-10αH,23βH-葫芦素-5,24-二烯-11-酮(21)。结论化合物2、4~6、8、9、19~21为首次从金腰属植物中分离得到,其余化合物均为首次从长梗金腰中分离得到。