紫珠的水溶性成分

目的：研究中药紫珠的水溶性成分。方法：运用多种色谱技术进行分离纯化，运用光谱技术鉴定化合物结构。结果：从紫珠的水溶性提取物中分离到4个苯丙素苷类化合物，分别鉴定为连翘苷（forsythoside B，1），arenarioside（2），类叶升麻苷（acteoside，3）和异类叶升麻苷（isoacteoside，4）。结论：这4个化合物都是首次从该植物中分离得到。     

肉苁蓉中异麦角甾苷的制备及含量测定

目的:研究中药肉苁蓉中异麦角甾苷标准品的制备及含量测定方法。方法:采用微晶纤维素色谱与半制备高效液相色谱组合分离技术,分离纯化异麦角甾苷,采用薄层色谱法和高效液相色谱面积归一化法检测纯度,波谱法鉴定其结构,反相高效液相色谱法测定其含量。结果:制备的化合物鉴定为异麦角甾苷,纯度为98.6%;含量测定在0.218~1.308μg,呈良好线性关系,r=0.9995,平均回收率为102.8%,RSD为2.60%,n=6。结论:该制备方法效率高,所得化合物纯度高,可用于大量制备;含量测肉苁蓉,定方法准确,简便,可靠,重复性好。     

Anti-inflammatory phenylpropanoid glycosides from <Emphasis Type="Italic">Clerodendron trichotomum</Emphasis> leaves

The chromatographic separation of MeOH extract from Clerodendron trichotomum Thunberg leaves led to the isolation of three phenylpropanoid compounds. Using spectroscopic methods, the structures of these compounds were determined as β-(3′, 4′-dihydroxyphenyl)ethyl-O-α-L-rhamnopyranosyl (1→3)-β-D-(4-O-caffeoyl)-glucopyranoside, acteoside (verbascoside) (1), β-(3′, 4′-dihydroxyphenyl)ethyl-O-α-L-rhamnopyranosyl (1→3)-β-D-(6-O-caffeoyl)-glucopyranoside, isoacteoside (2), β-(3′, 4′-dihydroxyphenyl) ethyl-O-α-L-rhamnopyranosyl (1→3)-β-D-glucopyranoside, and decaffeoylacteoside (3). We measured the anti-inflammatory activity of these three phenylpropanoid compounds both in vitro (DPPH Reduction Assay, TBARS Assay on Cu ²⁺-induced oxidized LDL, PGE₂ assay) and in vivo (acetic acidinduced vascular permeability in mice and carrageenan-induced hind paw edema in rats). 80% methanol fraction and acteoside had the activity.