betulin相关论文
A two-step treament was developed to obtain purified betulin from birch bark.The birch bark was first extracted using al......
Distribution and Expression Characteristics of Triterpenoids and OSC genes in White Birch (Betula pl
Betulin and oleanolic acids (pentacyclic triterpenoid secondary metabolites) have broad pharmacological activities a......
Integrating qualitative and quantitative characterization of Prunellae Spica by HPLC-QTOF/MS and HPL
The present study was designed to analyze the major constituents in Prunellae Spica and establish a method for simultane......
Analysis of three types of triterpenoids in tetraploid white birches(Betula platyphylla Suk.) and se
Betulin, oleanolic acid, and betulinic acid are naturally occurring pentacyclic triterpenoids that have significant medi......
皮肤利什曼病（cutaneousleishmaniasis）是南美热带地区，尤其是亚马孙河森林中的一种原虫病。Doliocarpus属藤本植物广泛生长在亚马孙......
[Objective]To study the anti-tumor active ingredients of Betula albo-sinensis Burk.bark.[Method]The compounds were isola......
采用多种色谱学方法和波谱学技术,从红树植物海漆Excoecaria agallocha L.中分离得到12个化合物,分别鉴定为excoagallochaol A(1),......
To investigate the non-alkaloidal chemical constituents of the stems and leaves of Melodinus suaveolens and their antiba......
Objective To study the chemical constituents of whole plant of Phyllanthus urinaria and their biological activity.Method......
Synthesis and cytotoxicity of 28-carboxymethoxy lupane triterpenoids.Preference of 28-O-acylation ov
28-Carboxymethoxy lupane tritepenoids 3 and 4 were synthesized by alkylation of betulin with the THP protected 2- hydrox......
以白桦(Betula platy phylla Suk.)树皮为材料,对桦皮素的提取方法和重结晶方法进行了优化.结果表明利用乙醇提取法和乙醇与氯仿重......
Betulinic acid and its derivatives have been extensively studied in the past for their anti-tumor effects, but relativel......
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Macroscopic fungi on Caucasian alder wood (Alnus subcordata) were identified and tested as a source of betulin and betul......
Synthesis and cytotoxicity of 28-carboxymethoxy lupane triterpenoids. Preference of 28-O-acylation o
为探究吕家坨井田地质构造格局,根据钻孔勘探资料,采用分形理论和趋势面分析方法,研究了井田7......
Betulinic acid and its derivatives have been extensively studied in the past for their anti-tumor effects, but relativel......
为了进一步开发和利用桦木醇衍生物,以桦木醇为起始物,在其C-3、C-28和C-30上进行修饰,得到了28-O-[2-(吡咯烷-1-基)乙酰基]-桦木......
目的:探讨白桦脂醇对人胃癌MGC-803细胞增殖和凋亡的影响。方法:CCK-8试剂盒检测不同浓度白桦脂醇对细胞活性的影响;Western blot......
目的探讨白桦脂醇对Aβ25-35诱导的PC12细胞氧化应激和凋亡的影响。方法以40μmol/L Aβ25-35作用于PC12细胞,实验随机分对照组、A......
目的:阐明白桦脂醇对宫颈癌细胞系c4-1移植瘤模型裸鼠的影响和机制。方法:皮下注射宫颈癌细胞系c4-1建立异种移植瘤模型,将移植瘤B......
通过Jones（琼斯）试剂氧化法，首次采用L9（34）正交实验设计，以制备获得的桦木酮酸收率为指标，研究由桦木醇一步法合成桦木酮酸的工艺参数. ......
提出了高效液相色谱法（HPLC）测定白桦树皮中白桦酯醇和儿荼素含量的方法。色谱柱为Shim-packCLC-ODSC18（150mm×6．0mm，5um），流动相为......
以白桦（Betula platyphylla Suk.）树皮为材料，对桦皮素的提取方法和重结晶方法进行了优化。结果表明利用乙醇提取法和乙醇与氯仿重结......
以桦木醇为原料合成了4种桦木醇吡啶盐,运用1 H-NMR和IR确认了化合物的结构.用噻唑蓝（MTT）比色法对这4种化合物对肝星状细胞、人肺癌......
运用拼合原理,合成了4种桦木酮缩氨基硫脲配体及其铜、银、镉、钯金属配合物,通过核磁共振氢谱（~1 H NMR）、红外光谱（IR）、元素分析、......
以桦木醇为起始物,通过对其3号位与28号位进行修饰,合成了两种配体(桦木酮酸缩氨基硫脲和28-O-丁二酸酯桦木酮缩氨基硫脲)及其金属......
目的观察白桦脂醇和地塞米松共同作用于小鼠MC3T3-E1细胞后,内源性脂质蓄积与细胞凋亡中的关系。方法以MC3T3-E1细胞为研究对象,采......
分别以乙醇、乙醇/水、水为提取剂,研究从白桦树皮中提取桦木醇的工艺,确定了用乙醇作提取剂的最佳提取工艺条件：固液比（g∶mL）为0.08......
以桦木醇为先导结构,对桦木醇的C-28、C-29位进行结构修饰,分别在CrO 3和2,2,6,6-四甲基哌啶氮氧化物(TEMPO)混合物以及氧化剂间氯......
为大量获得高纯度的桦木酸及准确测定桦木酸的含量,从白桦树皮中提取桦木醇,经琼斯试剂氧化制备中间产物桦木酮酸后,用硼氢化钠还......
Betulinic acid and its derivatives have been extensively studied in the past for their anti-tumor effects, but relativel......
In this study, we investigated the effect of different types of light and MeJA treatment on the accumulation of betulin ......
本研究从白桦树皮中提取了桦木醇。采用混合溶剂法对提取的桦木醇进行了分离纯化，运用紫外分光光度法（UV）对纯化效果进行了比较分析；利......
Macroscopic fungi on Caucasian alder wood(Alnus subcordata)were identified and tested as a source of betulin and betulin......
Betulinic acid is a known natural product which has gained a lot of attention in the recent years since it exhibits a va......
