狗枣猕猴桃根化学成分的研究

从长白山产狗枣猕猴桃根中,分离得到两个白色单体。经光谱分析和化学方法鉴定为△⁷-豆甾烯醇和具有生物活性的化合物,其结构为2,3-二-O-β-D-半乳糖基-α-D-半乳糖,命名为狗枣三糖。     

中华猕猴桃果实化学成分的研究

目的对中华猕猴桃Actinidia Chinensis Planch.果实的化学成分进行研究。方法果实的乙酸乙酯提取物采用硅胶、Sephadex LH-20凝胶、反相ODS柱等方法进行分离纯化,根据所得化合物的波谱数据确定其结构。结果从中分离得到8个化合物,分别鉴定为3β-乙酰氧基-12-烯-28-乌苏酸(1)、2α,3β-二羟基-12-烯-28-乌苏酸(2)、2α,3α-二羟基-12-烯-28-乌苏酸(3)、2α,3α-二羟基-12-烯-28-齐墩果酸(4)、齐墩果酸(5)、乌苏酸(6)、胡萝卜苷(7)、β-谷甾醇(8)。结论化合物1~4为首次从中华猕猴桃果实中分离得到。     

Chemical constituents of the roots of Ostericum grosseserratum (Maxim.) Kitag.]

This paper reports the isolation of eleven compounds from the roots of Ostericum grosseserratum, of which nine compounds were elucidated as myristic acid, palmitic acid, stearic acid, octacosanoic acid, succinic acid, beta-sitosterol, sitosterol-beta-D-glucoside, isoscopletin and sucrose. The results are helpful in the study of plant taxonomy.     

Chemical constituents of Parthenocissus thomsonii (Laws.) Planch]

Five compounds (1-5) were isolated from the leaves of Parthenocissus thomsonii collected in Henan. On the basis of chemical reaction and spectroscopic studies, 1, 2 and 3 were identified as friedelin, epifriedelanol and quercetin respectively.     

刺五加药材提取工艺的研究

目的建立刺五加药材提取工艺。方法以异秦皮啶和甲醇浸出物为指标,采用正交试验法,对最佳提取工艺进行工艺参数考察。结果刺五加粗粉加12倍量的75%乙醇分3次回流提取,每次2.0h为最佳提取工艺。结论该提取工艺合理,生产实际操作简单,适合于大规模生产。     

Chemical constituents of Rhodiola kirilowii (Reg.) Reg.]

Three compounds were isolated from the water-soluble part of alcohol extracts of rhizomes of Rhodiola kirilowii. Two of them were identified as salidroside and tyrosol, respectively by chemical and spectral analysis. beta-sitosterol was obtained from the petroleum extracts of the plant.     

Chemical constituents of Pericampylus glaucus (Lam.) Merr.]

Six crystalline substances were isolated from the rhizoma of Pericampylus glaucus and identified as epifriedelinol, melissic acid, palmatic acid, stearic acid, bututic acid and daucosterol.     

怀槐化学成分的研究(Ⅱ)

目的 :对怀槐心材乙醇提取物的乙酸乙酯萃取部分进行化学成分的研究。方法 :硅胶柱色谱和SephadexLH-20凝胶色谱分离纯化 ;UV ,IR ,MS ,HNMR ,^{13相似文献}   

刺五加化学成分与药理研究进展

目的：对刺五加国内外化学成分、药理研究进展进行总结。方法：根据国内外有关文献，按照化学成分、药理作用进行分类。结果：总结发现刺五加含有多种活性成分，具有免疫调节、抗肿瘤、抗衰老、抗疲劳等药理作用。结论：刺五加具有开发成新型中药保健品及药品的价值。     

刺五加叶皂甙降血糖作用

刺五加叶皂甙按100,200mg/kg的剂量给小鼠或大鼠多次ip给药,对葡萄糖、四氧嘧啶及肾上腺所引起的高血糖均有抑制作用。对正常小鼠的血糖有降低作用,但无显著意义。     

HPLC法同时测定无梗五加果实中金丝桃苷和东莨菪内酯的含量

目的:建立同时测定无梗五加[Acanthopanax sessiliflorus(Ruqr.et Maxim)Seem.]果实中金丝桃苷及东莨菪内酯含量的方法。方法:采用Tigerkin ODS C18,5μm,1.6×250mm色谱柱,流动相为乙腈-3%冰乙酸水溶液(体积比为20:80),流速1.0mL/min,柱温30℃,检测波长0～13min360nm,13～20min345nm。结果:金丝桃苷、东莨菪内酯的线性范围分别为0.06912～0.3456μg(R=0.9999)、0.01424～0.09968μg(R=0.9999),平均回收率分别为100.9%(RSD=2.8%)、99.6%(RSD=2.7%)。结论:此方法准确、可靠,可用于无梗五加果实的质量控制。     

Eleutherococcus senticosus (Rupr. & Maxim.) Maxim. (Araliaceae) as an adaptogen: a closer look

The adaptogen concept is examined from an historical, biological, chemical, pharmacological and medical perspective using a wide variety of primary and secondary literature. The definition of an adaptogen first proposed by Soviet scientists in the late 1950s, namely that an adaptogen is any substance that exerts effects on both sick and healthy individuals by 'correcting' any dysfunction(s) without producing unwanted side effects, was used as a point of departure. We attempted to identify critically what an adaptogen supposedly does and to determine whether the word embodies in and of itself any concept(s) acceptable to western conventional (allopathic) medicine. Special attention was paid to the reported pharmacological effects of the 'adaptogen-containing plant' Eleutherococcus senticosus (Rupr. & Maxim.) Maxim. (Araliaceae), referred to by some as 'Siberian ginseng', and to its secondary chemical composition. We conclude that so far as specific pharmacological activities are concerned there are a number of valid arguments for equating the action of so-called adaptogens with those of medicinal agents that have activities as anti-oxidants, and/or anti-cancerogenic, immunomodulatory and hypocholesteroletic as well as hypoglycemic and choleretic action. However, 'adaptogens' and 'anti-oxidants' etc. also show significant dissimilarities and these are discussed. Significantly, the classical definition of an adaptogen has much in common with views currently being invoked to describe and explain the 'placebo effect'. Nevertheless, the chemistry of the secondary compounds of Eleutherococcus isolated thus far and their pharmacological effects support our hypothesis that the reported beneficial effects of adaptogens derive from their capacity to exert protective and/or inhibitory action against free radicals. An inventory of the secondary substances contained in Eleutherococcus discloses a potential for a wide range of activities reported from work on cultured cell lines, small laboratory animals and human subjects. Much of the cited work (although not all) has been published in peer-reviewed journals. Six compounds show various levels of activity as anti-oxidants, four show anti-cancer action, three show hypocholesterolemic activity, two show immunostimulatory effects, one has choleretic activity and one has the ability to decrease/moderate insulin levels, one has activity as a radioprotectant, one shows anti-inflammatory and anti-pyretic activities and yet another has shown activity as an antibacterial agent. Some of the compounds show more than one pharmacological effect and some show similar effects although they belong to different chemical classes. Clearly, Eleutherococcus contains pharmacologically active compounds but one wishes that the term adaptogen could be dropped from the literature because it is vague and conveys no insights into the mechanism(s) of action. If a precise action can be attributed to it, then the exact term for said action should obviously be used; if not, we strongly urge that generalities be avoided. Also, comparison of Eleutherococcus with the more familiar Panax ginseng C.A. Meyer (Araliaceae), 'true ginseng' has underscored that they differ considerably chemically and pharmacologically and cannot be justifiably considered as mutually interchangeable. Accordingly, we recommend that the designation 'Siberian ginseng' be dropped and be replaced with 'Eleutherococcus'. In the case of both Eleutherococcus and true ginseng, problems inherent in herbal preparation use include inconsistencies not only in terms of indications for use, but in the nomenclature of constituent chemical compounds, standardization, dosage and product labeling. (ABSTRACT TRUNCATED)     

软枣猕猴桃根化学成分的研究

 目的：分离鉴定软枣猕猴桃根化学成分。方法：用体积分数为95%的乙醇提取,上硅胶柱层析分离,IR,NMR和MS光谱方法确定结构。结果：分得4个化合物,分别鉴定为β-谷甾醇,毛花猕猴桃酸B,2α,3α,24-三羟基1-12-烯-28-乌苏酸和胡萝卜苷。结论：毛花猕猴桃酸B,2α,3α,24-三羟基-12-烯-28-乌苏酸和β-谷甾醇为首次从该植物中分离得到。     

锁阳化学成分的研究

目的研究锁阳的化学成分。方法利用硅胶柱层析、重结晶等方法对锁阳乙酸乙酯部位进行分离纯化,然后通过1H-NMR、13H-NMR、MS等手段鉴定所得化合物的结构。结果从中分离得到9个化合物,经鉴定分别为十八烷酸α-单甘油酯(1)、β-谷甾醇(2)、正丁酸(3)、细梗香草内酯(4)、胡萝卜苷(5)、原儿茶酸(6)、儿茶素(7)、没食子酸(8)、表儿茶素没食子酸酯(9)。结论化合物9为首次从该属植物中分离得到,化合物1和3为首次从该植物中分离得到。     

软枣猕猴桃茎化学成分的研究

 从软枣猕猴桃[Actindiaarguta(Sieb,etZucc.)Planch.ExMiquel]茎中，分离到3种化合物。经光谱及化学方法鉴定，证明分别是乙酰齐墩果醚、乌苏酸、胡萝卜甙。其中乙酰齐墩果酸系首次从该植物中分得。     

软枣猕猴桃叶化学成分的研究

从软枣猕猴桃叶中分离得到4种结晶成分,经理化常数和光谱分析证明熊果酸,齐墩果酸,琥珀酸和胡萝卜甙。     

红毛七化学成分的研究

目的 研究红毛七的化学成分.方法 红毛七乙醇提取得到的浸膏分别用石油醚、三氯甲烷、乙酸乙酯和正丁醇萃取,正丁醇萃取物经硅胶柱层析和Sephadex LH-20柱层析得到化合物1～4,乙酸乙酯萃取物经硅胶柱层析得到化合物5～7,利用波谱学技术和化学方法对所得化合物进行结构鉴定.结果 鉴定7个化合物为:刺囊酸-α-L-吡喃阿拉伯糖苷(1)、常春藤皂苷元-3-O-β-D-葡萄吡喃-(1→2)-α-L-阿拉伯吡喃糖苷(2)、常春藤皂苷元-3-O-α-L-阿拉伯吡喃糖苷(3)、葳严仙皂苷元-3-O-α-L-阿拉伯吡喃糖苷(4)、β-豆甾醇(5)、羽扇豆醇(6)、胆甾醇(7).结论 化合物5,6,7为首次从该植物中分离得到,化合物1为首次从本属植物分离得到.     

刺五加化学成分的研究

从刺五加中分得3种单体成分。经理化常数测定和光谱数据分析,分别确定它们的结构为硬脂酸,白桦脂酸和苦杏仁甙。