弯茎还阳参石油醚部位化学成分研究

目的 研究弯茎还阳参Crepis flexuosa全草的化学成分.方法 采用硅胶及Sephadex LH-20柱层析进行分离纯化,通过理化性质和光谱分析鉴定结构.结果 从弯茎还阳参中分离得到10个化合物,分别鉴定为木栓酮(friedelin,1),α-香树素(α-amyrin,2),β-香树素(β-amyrin,3),...     

球形红细菌生物转化槲寄生中总三萜类化合物的测定

目的：建立槲寄生及球形红细菌转化槲寄生培养液中总三萜类化合物的含量测定方法,并对各个样品的含量进行比较研究。方法：采用紫外分光光度法,以齐墩果酸为对照品,5%的香草醛-冰醋酸溶液和高氯酸为显色系统,535 nm波长处测定总三萜类化合物的含量。结果：齐墩果酸在2～12μg/ml的范围内线性关系良好,标准曲线回归方程为A=21.988C-0.072,r=0.989 5。75%的乙醇提取、半量常规培养基、游离球形红细菌培养,所得培养液（样品3）总三萜含量和槲寄生75%的乙醇提取液（样品1）相比增加141%。结论：经过球形红细菌转化可以增加槲寄生提取液中总三萜类化合物的含量。     

Anticancer Activities and the Drug Targets of Botanical Saponins from a Medicinal Herb, Gynostemma Pentaphyllum

Triterpenoid saponins are metabolites produced in most plant species through complex biosynthetic pathways. They play important roles to humans owing to their diverse medicinal effects, including antiinflammatory, antimicrobial, and anticancer activities. In our laboratory, the author have been investigating the anticancer activities of a mixture of triterpenoid saponins （designated GpMix） extracted from a medicinal plant, known as Jiao Gu Lan （Gynostemma pentaphyllum, 胶股蓝 ） or southern ginseng in China. The key findings are summed up as following.     

手术后放疗加口服积雪甙治疗瘢痕疙瘩的临床研究

目的比较3种联合疗法治疗瘢痕疙瘩的效果,同时探讨积雪甙对瘢痕疙瘩的治疗作用。方法在外科手术切除术后予以浅层X线放疗的基础上,将106例瘢痕疙瘩患者随机分成使用积雪甙的高剂量组和低剂量组,以及使用安慰剂的对照组进行研究。结果所有患者手术切口均甲级愈合,使用积雪甙的治疗组75例患者痊愈率33.3%,有效率86.7%;对照组31例患者的痊愈率12.9%,有效率48.4%。Ridit方法分析:2个治疗组疗效明显优于使用安慰剂的对照组(P<0.01和P<0.05),而使用积雪甙片的2个治疗组之间差异无显著性(P>0.05)。结论手术、放射结合积雪甙片治疗瘢痕疙瘩效果可靠,且无明显的副作用。     

多裂委陵菜化学成分的研究

目的:研究多裂委陵菜(Potentilla multifida L.)的化学成分. 方法:用色谱法和波谱法对多裂委陵菜的化学成分进行分离和结构鉴定. 结果:分离、鉴定了5个化合物:3β,24-二羟基-乌苏-12-烯(1);3β-羟基-乌苏-12-烯-28-酸(2);2α,3α,19α-三羟基-乌苏-12-烯-28-酸(3);2α,3β,19α-三羟基-乌苏-12-烯-28-酸(4);3β,24-二羟基-齐墩果-12-烯-28-酸(5). 结论:5个化合物均为首次从该种植物获得,1和5为首次从该属植物获得,1为新天然产物.     

半红树植物黄槿中的三萜和甾醇成分(英文)

目的:研究半红树植物黄槿(Hibiscus tiliaceus L.)的化学成分。方法:分离纯化采用硅胶色谱、Sephadex LH-20凝胶色谱、高效液相色谱等方法。结构鉴定通过理化常数和波谱数据与文献对照确定。结果:从黄槿中共分离鉴定了10个化合物,分别为:木栓酮(1)、粉蕊黄杨二醇(2)、β-粘霉烯醇(3)、羽扇豆醇(4)、日耳曼醇(5)、豆甾-4-烯-3-酮(6)、豆甾-4,22-二烯-3-酮(7)、麦角甾-4,6,8(14),22-四烯-3-酮(8)、β-谷甾醇(9)和豆甾醇(10)。结论:化合物3～5和8为首次从该植物中分离得到。     

黄花败酱的化学成分研究

目的：对黄花败酱的化学成分进行研究。方法：采用乙醇提取，溶剂萃取，硅胶柱层析，重结晶等从败酱科植物黄花败酱的全草中提取分离活性成分，通过波谱解析及化学方法进行结构鉴定。结果：自黄花败酱醇提物中分得8个化合物。结论：除文献报道过的齐墩果酸（oleanolic acid)，东茛菪素（scopoletin)，β－谷甾醇（β－sitosterol)和β－胡萝卜甙（daucostarine)外，还首次从黄花败酱中分到2α－羟基齐墩果酸（2α－hydroxyoleanolic acid),2α-羟基乌苏酸（2α－hydroxyursolic acid)，齐墩果酸－3－O－β－D－吡喃木糖苷（oleanoliic adic-3-O-β-D-xylopyranoside)和3，4－二羟基苯甲酸（3，4－dihydroxybenzoic acid)。     

小红参的化学成分研究

小红参的化学成分研究徐晓莹，周金云，方起程（中国医学科学院中国协和医科大学药物研究所，北京１０００５０）小红参（Ｒｕｂｉａｙｕｎｎａｎｅｎｓｉｓ（Ｆｒａｎｃｈ）Ｄｉｅｌｓ）是茜草科茜草属植物云南茜草的根（１）。民间根据小红参有温经通络、活血祛风、软坚...     

Antiulcerogenic activity of fractions and 3,15-Dioxo-21α-hydroxy friedelane isolated from Maytenus robusta (Celastraceae)

The hexane, chloroform, ethyl acetate and aqueous-soluble fractions from leaves of Maytenus robusta (Celastraceae) were evaluated for their protective actions against ethanol-induced gastric lesions in rats. The treatment with all fractions (150 mg/kg) and omeprazol (30 mg/kg) significantly reduced the lesion index, the total lesion area, and the percentage of lesion, in comparison with the control group (p<0.05). Since the ethyl acetate-soluble fraction was found to be most active in the pylorus ligated model, this fraction was further investigated and resulted in the isolation of triterpene 3,15-dioxo-21α-hydroxy friedelane. The triterpene was evaluated in the HCl/ethanol-induced ulcer model in mice. In this assay, both the groups treated with 3,15-dioxo-21α-hydroxy friedelane and omeprazol, at a dose of 30 mg/kg, presented a significant reduction in lesion index, total lesion area, and in the percentage of the lesion, when compared with the control group (p<0.05). The result suggests that the antiulcer effect observed in the extract and fractions may be attributed, at least in part, to this compound. Further experiments are underway to determine which antiulcer mechanisms involved in gastroprotection.     

五色梅根三萜类物质镇痛和抗炎的实验研究

目的：研究五色梅根三萜类物质镇痛和抗炎作用。方法：用扭体法观察镇痛作用；用二甲苯使小鼠致炎观察该药的抗炎作用。结果；五色梅根三萜类物质对醋酸致痛具有明显的镇痛作用．对二甲苯所致炎性水肿也有显著的抑制作用。结论：五色梅根三萜类物质具有较好的镇痛抗炎作用。