HPLC法测定刺五加注射液中紫丁香苷和异嗪皮啶的含量

目的:建立刺五加注射液中紫丁香苷和异嗪皮啶的含量测定方法.方法:采用HPLC法.色谱柱为Diamomsil C18 (4.6mm× 200 mm,5μm),甲醇-水(20∶80)为流动相,流速1.0 mL·min-1,检测波长(双波长)265 nm,344nm.结果:紫丁香苷在0.01308～1.308 μg,异嗪皮啶在0.014659～0.122 16 μg范围内呈良好的线性关系,平均回收率分别为98.7％和102.2％,RSD分别为1.0％和0.8％.结论:所用方法简便、准确,能有效控制该制剂的质量.     

刺五加茎皮化学成分分析

目的:测定刺五加茎皮中丁香苷及总黄酮的含量。方法:采用HPLC法测定丁香苷的含量,三氯化铝-醋酸钠比色法测定总黄酮的含量。结果:刺五加茎皮中丁香苷的含量为0.132%,高于药典规定的0.05%的标准,总黄酮的含量为1.36%。结论:刺五加茎皮中丁香苷以及总黄酮的含量均较高,有较大的应用价值。     

槲寄生化学成分的研究——Ⅷ.2,3-丁二醇单葡萄糖甙的分离和结构

From the ethanol extract of Viscum coloratum (Kom.) Nakai , a giucoside ofaliphatic diol and three other glucosides were isolated. Based on chemical and spectroscopic analysis,the structures have been elucidated as 2-β-D- glucosyl-3- methylpropanol (Ⅷ), syringin (Ⅸ),eleatheroside E(Ⅹ) and syringenin-4'-O-D-apiosylglucoside (Ⅺ). Ⅷ is a new glucoside of aliphaticdiol and named 3-β-D-glucopyranosyloxy-butanol-2. Three other compounds (Ⅸ～-Ⅺ) were foundfor the first time in this plant.     

高效液相色谱法测定刺五加中丁香苷的含量

目的建立刺五加药材中丁香苷含量测定方法。方法采用C18柱,甲醇-水-乙酸(300∶700∶3.5)为流动相,流速:0.8 m l.m in-1,检测波长265 nm。结果丁香苷的加样回收率为98.3%,RSD为1.23%。结论该法简便,结果准确、可靠。     

高效液相色谱法测定复方刺五加糖浆中紫丁香苷含量

目的建立复方刺五加糖浆的含量测定方法。方法采用高效液相色谱法测定复方刺五加糖浆中紫丁香苷的含量。以甲醇-水（8：2）为流动相，以岛津VP—ODSC18柱（5μm4．6×150mm）为固定相，检测波长为265nm。结果紫丁香苷在0．0805～1．61μg范围内有良好的线性关系，r=0．9997。平均回收率为97．4％（n=6），RSD=0．55％。结论该法操作简便准确，可作刺五加糖浆中紫丁香苷的质量控制方法。     

Metabolism of liriodendrin and syringin by human intestinal bacteria and their relation toin vitro cytotoxicity

When liriodendrin or syringin was incubated for 24 h with human intestinal bacteria, two metabolites, (+)-syringaresinol-beta-D-glucopyranoside and (+)-syringaresinol, from liriodendrin and one metabolite, synapyl alcohol, from syringin were produced. The metabolic time course of liriodendrin was as follows: at early time, liriodendrin was converted to (+)-syringaresinol-beta-D-glucopyranoside, and then (+)-syringaresinol. The in vitro cytotoxicities of these metabolites, (+)-syringaresinol and synapyl alcohol, were superior to those of liriodendrin and syringin.     

Role of sympathetic tone in the loss of syringin-induced plasma glucose lowering action in conscious Wistar rats

Syringin is an active principle purified from the rhizome and root parts of Eleutherococcus senticosus (Araliaceae). The present study is designed to clarify the role of sympathetic activation in the insulinotropic effect of syringin. Plasma glucose lowering effect accompanying with the increase of plasma insulin and C-peptide were obtained in pentobarbital anesthetized Wistar rats 60min after an intravenous (i.v.) injection of syringin (100 microg/kg). However, neither the plasma glucose lowering action, nor the raised plasma levels of insulin and C-peptide can be obtained in conscious rats received same syringin treatment. Otherwise, the insulin-releasing and plasma glucose lowering actions of syringin (100 microg/kg, i.v.) were appeared in conscious rats under chemical sympathectomy using an intraperitoneal injection of guanethidine. In addition, plasma glucose lowering action of syringin (100 microg/kg, i.v.) was observed in conscious rats with alpha1-adrenoceptor blockade by prazosin. The stimulatory actions of syringin on the secretion of plasma insulin and C-peptide were also obtained in prazosin-treated conscious rats. The obtained results suggest that insulinotropic effect of syringin on the plasma glucose regulation is impaired in conscious rats with a regular sympathetic tone; decrease of sympathetic tone as observed in anesthetized animal might be helpful in the therapeutic benefit of syringin.     

HPLC测定倒卵叶五加冲剂中紫丁香苷含量研究

目的:建立测定倒卵叶五加冲剂中紫丁香苷含量的HPLC测定方法。方法:色谱柱:kromasil C18柱(150mm×4.6mm,5μm);流动相:乙腈-水(10∶90);流速:1mL.min-1;检测波长:265nm;柱温:35℃。结果:经检测,紫丁香苷的线性范围为0.0192～0.1536mg/mL,Y=9.846+2.824X×104 C(r=0.999 6),加样回收率为97.7%。结论:HPLC测定倒卵叶五加冲剂中紫丁香苷含量,方法稳定可靠,操作简便,可作为五加参冲剂质量控制指标。     

倒卵叶五加中紫丁香苷提取工艺研究

目的：优选倒卵叶五加中紫丁香苷的最佳提取工艺。方法：通过正交试验法,用HPLC法测定提取液中紫丁香苷含量,对影响倒卵叶五加提取工艺因素水平进行研究。结果：最佳工艺为12倍50%乙醇回流提取3次,每次2h,提取次数及乙醇浓度影响差异显著。结论：50%乙醇提取工艺用于倒卵叶五加的提取,该工艺设计合理,操作简单,质量稳定,可为工业生产提供理论依据。     

Chemical Constituents of the Roots of Oplopanax elatus Nakai

Nine compounds were isolated from the extract of the roots of Oplopanax elatus Nakai(Echinopanax elatus Nakai),family Araliaceae.The chemical structures of six compounds wereestablished by measuring chemical and physical constants,spectral data(IR,EI-MS,FD-MS,~1HNMR and ~(13)CNMR)and chemical methods,as 1-heptacosanol,β-sitosterol,daucosterol,