共查询到19条相似文献,搜索用时 93 毫秒
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灯台叶中的非碱性成分 总被引:7,自引:0,他引:7
目的:研究傣族药灯台叶中的非碱性成分。方法:乙醇提取物经酸碱处理得非碱性成分,正、反相色谱法和Sephadex LH-20凝胶柱色谱法分离,NMR,MS等波谱技术鉴定化合物的结构。结果:分离得到14个非碱性化合物:环桉烯醇(1),乙酰-α-香树醇酯(2),β-香树醇-3-棕榈酸酯(3),羽扇豆-20(29)-烯-3-醇(4),羽扇豆-20(29)-烯-3-棕榈酸酯(5),β-谷甾醇(6),角鲨烯(7),α-生育酚(8),α-生育醌(9),邻苯二甲酸二(2-乙基)己酯(10),邻苯二甲酸二丁酯(11),1-羟基-3,5-二甲氧基-酮(12),7,3',4'-三甲氧基-5-羟基黄酮(13),3,5,7,4'-四羟基黄酮-3-O-β-D-葡萄糖苷(14)。结论:化合物3,5,7-13为首次从该植物中分得。 相似文献
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秋燥咳嗽属中医燥邪伤肺咳嗽,临床表现主要为喉痒干咳,咽喉干痛,唇鼻干燥,干咳无痰或痰少而黏,治疗常以疏风清肺,润燥咳嗽为主.笔者临床运用桑杏汤加减配合傣药灯台叶治疗本病128例,疗效显著.现将结果报道如下. 相似文献
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海芒果叶中黄酮类成分的研究 总被引:2,自引:0,他引:2
目的:研究海芒果叶中的黄酮类成分。方法:通过多种柱色谱进行分离纯化,根据理化性质和波谱数据进行结构鉴定。结果:从海芒果叶中分离得到了8个黄酮类成分,分别鉴定为槲皮素(1)、柚皮素(2)、香橙素(3)、山奈酚-7-O-葡萄糖苷(4)、5-O-葡萄糖-7,4'-二羟基-3',5'-二甲氧基-二氢黄酮(5)、山奈酚(6)、山奈酚-3-O-芸香糖苷(7)、芦丁(8)。结论:化合物1~6均为首次从该属植物中分离得到。 相似文献
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目的:建立道路绿化用灯台叶中11种重金属含量测定方法,HPLC指纹图谱,熊果酸及齐墩果酸含量测定方法,拟探讨灯台叶中重金属含量、有效成分含量和整体质量的变化关系,为灯台叶药材的采收提供依据。方法:22批灯台叶样品中S1~S12来自不同种植园,S13~S22采自不同街道绿化带中。采用ICP-MS测定灯台叶中重金属含量,HPLC指纹图谱结合相似度和主成分分析评价两组样品整体质量变化。结果:部分样品中Se和Hg未检出,其他元素在样品中均有检出,其中Fe,Mn含量较高,As,Se,Pb含量较低。道路绿化样品中Hg元素均被检出,平均值为0.1μg·g~(-1),而种植园样品中Hg元素均低于检测线。种植园样品中As和Se含量变异最大RSD120%,Cr和Ni含量RSD60%。道路绿化样品中Cr,Mn,Fe,Ni,As,Se含量变化RSD70%,但与种植园样品相比变化较大,Cu,Se,Pb在两组样品中变化水平相当。根据《药用植物及制剂外经贸绿色行业标准》(WM/T2-2004)中相关规定计算,22个样品中Pb,Cd,Hg,Cu,As均未超标,但道路绿化样品中上述有毒重金属元素呈现升高趋势。种植园样品指纹图谱共标记16个共有峰,道路绿化样品仅13个共有峰,且两组样品在色谱峰数量和吸光度上均有较大差异。种植园样品之间相似度较高,除S1,S4,S11外其他均0.95,绿化样品相似度较小,仅S18相似度0.9,其余在0.557~0.895离散分布。两组样品有12个共有峰,种植园样品共有峰面积均大于道路绿化样品,且峰面积RSD均小于道路绿化样品,将两组样品原始色谱数据进行主成分分析,两组样品被截然分开。结论:道路绿化灯台叶中有毒重金属含量与种植园样品相比有升高趋势,化学信息少且有效成分含量较低、变化大。为确保药材安全性和临床疗效,建议城市道路绿化灯台树不作为傣族药材灯台叶的来源。 相似文献
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对啤酒花Humulus lupulus的化学成分进行研究.采用大孔树脂、硅胶柱、ODS柱、Sephadex LH-20柱和高压制备液相色谱仪分离纯化,利用MS,NMR等波谱方法鉴定化合物的结构.从啤酒花60%乙醇提取物中分离鉴定了9个化合物,依次为花旗松素(taxifolin,1),柚皮素(naringenin,2),柑橘查耳酮(chalconaringenin,3),金合欢素(acacetin,4),槲皮素3-O-β-D-吡喃半乳糖苷(quercetin 3-O-β-D-galactopyranoside,5),6-戊烯基柚皮素(6-prenylnaringenin,6),黄腐酚(xanthohumol,7),脱甲基黄腐酚(desmethylxanthohumol,8),黄腐酚B(xanthohumol B,9).其中,化合物1~5为首次从该植物中分离得到. 相似文献
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野艾蒿中黄酮类成分的研究 总被引:2,自引:0,他引:2
目的 研究野艾蒿的化学成分.方法 采用色谱方法进行分离、纯化,通过波谱技术对化合物进行结构鉴定.结果 从野艾蒿中分离得到11个黄酮类化合物,其结构鉴定分别为山柰酚( kaempferol,1)、芒柄花素(formononetin,2)、异鼠李素(isorhamnetin,3)、洋芹素(apigenin,4)、苜蓿素(tricin,5)、槲皮素-7-O-β-D-葡萄糖苷(6),槲皮素-7-O-α-L-鼠李糖苷(7),槲皮素-3-O-β-D-葡萄糖苷(8),山柰酚-3-O-β-D-葡萄糖苷(9),芹菜素-7-O-β-D-葡萄糖苷(10),山柰酚-3-O-芸香糖苷(11).结论 化合物1~11均为首次从该植物中分离得到. 相似文献
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目的:研究传统中药复方肠胃康中的黄酮类成分。方法:采用多种柱色谱对复方肠胃康进行分离纯化,利用理化性质和波谱数据鉴定化合物的结构。结果:从复方肠胃康中分离得到5 个黄酮类化合物,分别鉴定为槲皮素(1)、山奈酚-3-O-芸香糖苷(2)、芦丁(3)、山奈酚(4)和洋芹素(5)。结论:化合物1-5 均为首次从该复方中分离得到黄酮类化合物。 相似文献
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番石榴叶化学成分研究 总被引:3,自引:0,他引:3
目的:研究番石榴Psidium guajava叶的化学成分.方法:利用葡聚糖凝胶Sephadex LH-20、硅胶和MPLC等色谱方法进行化合物的分离纯化,根据化合物的理化性质、波谱数据进行结构鉴定.结果:从番石榴叶中分离得到9个单体化合物,分别为:乌苏酸(ursolic acid,1),2α-羟基乌苏酸(2α-hydroxyursolic acid,2),2α-羟基齐墩果酸(2α-hydroxyoleanolic acid,3),番石榴苷(morin-3-O-α-L-arabopyranoside,4),槲皮素(quercetin,5),金丝桃苷(hyperin,6),杨梅素-3-O-β-D-葡萄糖(myricetin-3-O-β-D-glucopyranosid,7),quercetin-3-O-β-D-glucuronopyranoside(8),1-O-没食子酰基-β-D-葡萄糖(1-O-galloyl-β-D-glucose,9).结论:化合物3,7~9为首次从该植物中分离得到. 相似文献
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白木香叶化学成分的研究 总被引:9,自引:5,他引:9
目的:研究白木香叶的化学成分,为白木香的综合利用提供依据.方法:采用硅胶柱色谱、Sephadex LH-20柱色谱、重结晶等方法进行分离纯化,运用NMR,Ms等波谱学方法进行结构鉴定.结果:从白木香叶中分离鉴定了13个化合物,分别为7-羟基-5,4'-二甲氧基.黄酮(1),洋芹素-7,4'-二甲醚(2),木犀草素-7,3',4'一三甲醚(3),异紫堇啡碱(4),对羟基苯甲酸(5),正三十二(烷)醇(6),正三十一烷(7),α-豆甾醇(8),表木栓醇(9),木栓烷(10),木栓酮(11),芫花素(12),5,4'-二羟基_7,3'-二甲氧基黄酮(13).结论:化合物4为首次从该属中分离得到,化合物1,6~11,13为首次从该植物中分离得到. 相似文献
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Abdul Jabbar Shah Saqib Ali Gowani Akber Jalil Zuberi Muhammad Nabeel Ghayur Anwarul Hassan Gilani 《Phytotherapy research : PTR》2010,24(1):28-32
This study was aimed to provide a pharmacological basis to the medicinal use of Alstonia scholaris as an antidiarrhoeal and antispasmodic by using in vivo and in vitro techniques. In the in vivo study the crude extract of Alstonia scholaris (As.Cr), which tested positive for the presence of alkaloids, provided 31–84% protection against castor oil‐induced diarrhoea in mice at 100–1000 mg/kg doses, similar to loperamide. In isolated rabbit jejunum preparation, the As.Cr caused inhibition of spontaneous and high K+ (80 mm )‐induced contractions, with respective EC50 values of 1.04 (0.73–1.48) and 1.02 mg/mL (0.56–1.84; 95% CI), thus showing spasmolytic activity mediated possibly through calcium channel blockade (CCB). The CCB activity was further confirmed when pretreatment of the tissue with the As.Cr (0.3–1 mg/mL) caused a rightward shift in the Ca++ concentration‐response curves similar to verapamil, a standard calcium channel blocker. Loperamide also inhibited spontaneous and high K+ precontractions as well as shifted the Ca++ CRCs to the right. These results indicate that the crude extract of Alstonia scholaris possesses antidiarrhoeal and spasmolytic effects, mediated possibly through the presence of CCB‐like constituent(s) and this study provides a mechanistic base for its medicinal use in diarrhoea and colic. Copyright © 2009 John Wiley & Sons, Ltd. 相似文献
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亚麻根的化学成分研究 总被引:2,自引:2,他引:2
目的:研究亚麻根Linum usitatissimum的化学成分.方法:运用硅胶柱色谱进行分离纯化,通过理化性质和波谱分析鉴定结构.结果:从中分离鉴定了10个化合物,分别为香草酸(vanillic acid,1),丁香酸(syringic acid,2),黄嘌呤(xanthine,3),牡荆苷(vitexin,4),异香草醛(isovanillin,5),(E)-3,3'-二甲氧基-4,4'-二羟基-1,2-二苯乙烯[(E)-3,3'-dimethoxy-4,4'-dihydfoxystilbene,6],2-甲氧基对苯二酚-4-β-D-吡喃葡萄糖苷(tachioside,7),β-谷甾醇和豆甾醇(8和9)混合物,盐酸小檗碱(berberine chloride,10).结论:化合物1~3,5~7,10是首次从该植物中分离得到. 相似文献
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Evaluation of anticancer activity of the alkaloid fraction of Alstonia scholaris (Sapthaparna) in vitro and in vivo 总被引:1,自引:0,他引:1
The anticancer effect of various doses of an alkaloid fraction of Sapthaparna, Alstonia scholaris (ASERS), was studied in vitro in cultured human neoplastic cell lines (HeLa, HepG(2), HL60, KB and MCF-7) and in Ehrlich ascites carcinoma bearing mice. Treatment of HeLa cells with 25 microg/mL ASERS resulted in a time dependent increase in the antineoplastic activity and the greatest activity was observed when the cells were exposed to ASERS for 24 h. However, exposure of cells to ASERS for 4 h resulted in 25% viable cells and hence this time interval was considered to be the optimum time for treatment and further studies were carried out using this time. Treatment of various cells with ASERS resulted in a concentration dependent decline in the viable cells and a nadir was reached at 200 microg/mL in all the cell lines studied. The IC50 was found to be 5.53, 25, 11.16, 10 and 29.76 microg/mL for HeLa, HePG2, HL60, KB and MCF-7 cells, respectively. Similarly, administration of ASERS, once daily for 9 consecutive days to the tumor bearing mice caused a dose dependent remission of the tumor up to 240 mg/kg body weight, where the greatest antitumor effect was observed. Since 240 mg/kg ASERS showed toxic manifestations, the next lower dose of 210 mg/kg was considered as the best effective dose, in which 20% of the animals survived up to 120 days post-tumor-cell inoculation as against no survivors in the saline treated control group. The ASERS treatment resulted in a dose dependent elevation in the median survival time (MST) and the average survival time (AST) up to 240 mg/kg ASERS and declined thereafter. The surviving animals were healthy and disease free. The effect of ASERS was better than cyclophosphamide, which was used as a positive control, where all the animals succumbed to death by 40 days and the MST and AST were 19.5 and 18.3 days, respectively. The effective dose of 210 mg of ASERS was 3/10 of the LD50 dose, which increased the MST and AST up to 54 and 49.5 days, respectively. 相似文献
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益智仁化学成分的研究 总被引:3,自引:1,他引:3
目的:研究益智仁Alpinia oxyphylla的化学成分.方法:采用硅胶和HPLC等色谱手段进行化学成分的分离纯化,根据波谱数据结合理化性质鉴定化合物结构;用SRB法对化合物进行肿瘤细胞毒活性试验.结果:从益智仁的70%丙酮-水提取物中分得8个化合物,鉴定其结构分别为(9E)-humulene-2,3;6,7-diepoxide(1),3(12),7(13),9(E).humulatriene-2,6-diol(2),(-)-oplopanone(3),yakuchinone A(4),yakuchinone B(S),杨芽黄素(6),异香草醛(7),(2E,4E)-6-羟基-2,6-二甲基-2,4-庚二烯醛(8);用肿瘤细胞株A549,HT-29和SGC-7901测定了化合物1,3~5的细胞毒活性.结论:化合物1~3,7,8为首次从该属植物中分离得到;化合物1,3~5 10 mg·L~(-1)对肿瘤细胞株A549,HT-29和SGC-7901未显示出细胞毒活性. 相似文献