复方黄金颗粒的薄层鉴别

目的:建立控制复方黄金颗粒的鉴别方法。方法:采用薄层层析对颗粒中黄芪、金银花、女贞子、枸杞子等中药进行薄层鉴别。结果:该薄层鉴别方法专属性强、重现性好。     

白黄散胶囊质量标准的研究

建立了白黄散胶囊的质量标准。用薄层色谱法鉴别白头翁、黄芪、黄连、黄柏、山楂、乌梅、诃子,以高效液相色谱法测定盐酸小檗碱的含量。结果薄层色谱图斑点清晰,阴性对照无干扰,盐酸小檗碱在9.91～148.65μg/mL范围内与峰面积线性关系良好,加样回收率为97.70%,RSD为1.30%。所建立的方法简便、准确、重现性好,可用于白黄散胶囊的质量控制。     

红姑娘抗感茶质量标准研究

用薄层色谱法对处方中的锦灯笼、连翘进行定性鉴别,用高效液相法测定制剂中牛蒡苷的含量。结果表明,在薄层色谱中可检出连翘、锦灯笼。在0.126～1.260μg范围内,牛蒡苷进样量与峰面积线性关系良好,平均回收率为100.42%,RSD为1.49%。     

云南大白口蘑子实体中秋水仙碱含量的TLC法测定研究

采用超声法提取云南大白口蘑子实体中的秋水仙碱,并用薄层扫描法来测定其含量。结果表明:λ=352 nm,秋水仙碱线性范围为0.08～0.94μg,相关系数为0.9994,平均回收率为99.65%,RSD=3.98%;该法准确、简便、快速、重复性好,适用于优质单株的高通量筛选。     

复方三七片质量标准研究

目的研究成方制剂复方三七片的质量标准。方法采用TLC对白芷、三七进行定性鉴别;采用HPLC进行主成分含量测定,色谱柱为Aglient ZORBAX C18柱(150 mm×4.6 mm,5μm),流动相为乙腈-水,梯度洗脱,流速为1.0 mL/min,检测波长为203 nm。结果 TLC可鉴别三七和白芷,HPLC测定人参皂苷Rg1、人参皂苷Rb1和三七皂苷R1,三者分别在0.048～0.384 mg、0.052 5～0.420 mg、0.011 8～0.094 4 mg范围内线性、精密度、稳定性均良好,阴性无干扰,平均加样回收率分别为100.91%(RSD=1.04%)、100.36%(RSD=1.04%)、100.29%(RSD=0.99%)。结论所建立的质量标准简便可行、重复性好,可以用来评价复方三七片的质量。     

薄层析-紫外分光光度法测定川芎中阿魏酸含量

[目的]建立一种测定川芎中阿魏酸含量的简单方法。[方法]利用薄层析法将川芎提取液中的阿魏酸与其他物质进行分离,再采用紫外分光光度法测定分离出的阿魏酸含量。[结果]薄层析展开剂为乙酸乙酯∶石油醚=2∶1(V/V)时阿魏酸能与其他物质完全分离,比移值(Rf)为0.53;阿魏酸的最大吸收波长为324 nm,质量浓度为0.5~1.7μg/m L范围内浓度与吸光度呈良好的线性关系,回归方程为Y=0.143A+0.004 3;4 h内阿魏酸在乙醇中的稳定性良好,样品川芎中阿魏酸含量约为0.1%,加样回收率为98.6%,RSD为1%~3%,精密度良好。[结论]薄层析-紫外分光光度法能够准确测定川芎中阿魏酸含量。     

New cholinesterase inhibiting bisbenzylisoquinoline alkaloids from Abuta grandifolia

The phytochemical study of the stem bark and wood of Abuta grandifolia (Mart.) Sandwith led to the identification of four bisbenzylisoquinoline alkaloids (BBIQs), namely (R,S)-2 N-norberbamunine (1), (R,R)-isochondodendrine (2), (S-S)-O4″-methyl, Nb-nor-O6'-demethyl-(+)-curine (3), and (S-S)-O4″-methyl, O6'-demethyl-(+)-curine (4), together with the aporphine alkaloid R-nornuciferine (5), all obtained by countercurrent distribution separation (CCD) and identified on the basis of their spectroscopic data. Alkaloids 3 and 4 were new. All the isolated compounds were tested for acetylcholinesterase (AChE) and butyrylcholinesterase (BChE) inhibitory activities. 1 was the most active against AChE, whereas 3 and 4 were the most potent against BChE. Interestingly, all tested alkaloids are more potent against BChE than against AChE. This selectivity of cholinesterase (ChE) inhibition could be important in order to speculate on their potential therapeutic relevance.     

Mechanism-based CYP2D6 inactivation by acridone alkaloids of Indonesian medicinal plant Lunasia amara

Fourteen acridone alkaloids isolated from Lunasia amara Blanco were tested for their mechanism-based inhibition on human liver microsomal dextromethorphan O-demethylation activity, a prototype marker for cytochrome P450 2D6 (CYP2D6). Among the 14 compounds, 5-hydroxygraveroline (1), 8-methoxyifflaiamine (2), lunamarine (3), and lunine (12) increased their inhibitory activity with increasing preincubation time. Then, we further examined the possibility of mechanism-based inhibition on 5-hydroxygraveroline (1) and lunamarine (3), which showed the potent inhibition. Further investigations on 1 and 3 showed that the characteristic time- and concentration-dependent inhibition, which required a catalytic step with NADPH, was not protected by nucleophiles, and was decreased by the presence of a competitive inhibitor. Thus, 1 and 3 were concluded as mechanism-based inactivators of CYP2D6.     

中药紫茉莉花根的鉴别研究

[目的]研究紫茉莉花根的生药学特性。[方法]采用显微鉴别法、理化检识法、薄层层析法和紫外光谱法对紫茉莉花根进行定性分析。[结果]紫茉莉花根中含有酚类、醛类和内酯类不饱和化合物。[结论]采用显微鉴别法、理化检识、薄层层析法和紫外光谱法对紫茉莉花根进行质量标准研究,方法简单结果准确。     

肥猪散中制何首乌的薄层鉴别方法研究

建立了肥猪散中制何首乌的薄层色谱(TLC)定性鉴别法。以制何首乌为对照药材,采用甲苯-乙酸乙酯-甲酸(15:2:0.8)为展开剂,在UV365nm波长下检视,氨蒸气为显色剂,对肥猪散中制何首乌进行薄层色谱法鉴别。结果制何首乌斑点清晰,阴性无干扰。本方法简便,快速,结果准确,重现性好。可用于控制肥猪散的质量。