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1.
草豆蔻中黄酮和双苯庚酮的抑菌活性   总被引:7,自引:0,他引:7  
以两倍稀释法测定了草豆蔻(Alpinia katsumadaiHayata)种子中4种黄酮和双苯庚酮类化合物的抑菌效果。结果表明,反,反-1,7-二苯基-4,6-庚二烯-3-酮和山姜素对幽门螺杆菌(Helicobacter pylori)的最低抑菌浓度(M IC)达到1.25μg.mL-1,与阳性药相比对幽门螺杆菌具有较强的抑菌活性;豆蔻明和乔松素对幽门螺杆菌的M IC分别为2.56和0.32 mg.mL-1。反,反-1,7-二苯基-4,6-庚二烯-3-酮和豆蔻明对金黄色葡萄球菌(Staphylococcus aureusRosenbach)、表皮葡萄球菌〔S.epiderm idis(W inslow et W inshlow)Evans〕、大肠杆菌〔Escherichia coli(M igu la)Castellan i et Chalm ers〕等菌株的M IC分别为0.208~1.667和0.122~1.955 mg.mL-1,与阳性药相比具有较强的抑菌活性。乔松素和山姜素对金黄色葡萄球菌、表皮葡萄球菌、大肠杆菌等菌株的M IC分别为1.275~2.550和1.925~3.850 mg.mL-1,也有一定的抑菌作用。豆蔻明、乔松素、反,反-1,7-二苯基-4,6-庚二烯-3-酮和山姜素是草豆蔻的抑菌活性成分。  相似文献   

2.
采用水蒸气蒸馏法提取挥发油,用气相-质谱联用法(GC-MS),对高良姜等10味山姜属药物的挥发油成分进行比较分析,了解亲缘关系、辛温药性与挥发油成分的关系。结果表明,10种挥发油中有9种含有桉叶油醇。此外,γ-杜松烯、γ-萜品烯、芳樟醇、莰烯、石竹素、4-萜烯醇、4,7,10-Cycloundecatriene,1,1,4,8-tetramethyl-,cis,cis,cis-也是它们的主要成分。这说明山姜属药物辛温性味与挥发油成分具有一定的相关性。  相似文献   

3.
为了解升振山姜(Alpinia hainanensis‘Shengzhen’)的化学成分,采用柱色谱技术从其茎中分离得到10个黄酮类化合物。经波谱分析,分别鉴定为(-)-乔松素(1)、(±)-山姜素(2)、(±)-7,4′-二羟基-5-甲氧基二氢黄酮(3)、4′,6′-二羟基-2′-甲氧基二氢查尔酮(4)、小豆蔻明(5)、蜡菊亭(6)、(+)-儿茶素(7)、(-)-表儿茶素(8)、原花青素A1(9)、原花青素A6(10)。体外活性测试表明,化合物1、3、5、7~10具有显著的ABTS自由基清除活性,化合物7~10具有显著的DPPH自由基清除活性。  相似文献   

4.
为了解姜黄(Curcuma longa L.)地上部分的化学成分,采用硅胶、葡聚糖凝胶柱色谱和高效液相色谱从姜黄地上部分分离得到14个化合物。通过波谱分析,分别鉴定为槲皮素3-O-α-L-鼠李糖苷(1)、山柰酚3-O-α-L-鼠李糖(1→2)-α-L-鼠李糖苷(2)、橙皮素7-O-α-L-鼠李糖(1→6)-β-D-葡萄糖苷(3)、1,7-二(4-羟基苯基)庚烷-4E,6E-二烯-3-酮(4)、1,7-二(4-羟基苯基)庚烷-1E,4E,6E-三烯-3-酮(5)、3-羟基-4-甲氧基肉桂酸(6)、对羟基苯甲醛(7)、香草醛(8)、4-羟基-3-甲氧基苯甲酸(9)、异香草酸(10)、4-(1-羟基-1-甲基乙基)苯甲酸(11)、R-6-羟基-6-甲基-3-(2-羟基异丙基)-2-烯环己酮(12)、6,9-二羟基-4,7-巨豆二烯-3-酮(13)和β-胡萝卜苷(14)。化合物1、2、3、12和13首次从该植物中分离得到。经HPLC比较分析,姜黄地上部分缺乏姜黄药材的主要功能成分姜黄素。  相似文献   

5.
采用硅胶、Sephades LH-20、RP-18等色谱技术,对草鞋木(Macaranga henryi)枝条中的化学成分进行了研究,共分离得到8个化合物,通过NMR、MS等波谱学技术将其结构分别鉴定为:12-O-tetradecanoylphorbol-13-acetate(1),trigowiin A(2),daturadiol(3),山楂酸甲酯(4),3β-羟基豆甾-5-烯-7-酮(5),3β-羟基豆甾-5,22-二烯-7-酮(6),豆甾-3,5-二烯-7-酮(7),丁香脂素(8)。化合物5为首次从该种植物中分离得到,其余化合物均为首次从该属植物中分离得到。  相似文献   

6.
从生姜(Zingiber officinaleRosc.)的根茎中分离得一个骨架新颖的天然产物,经波谱鉴定为一个新的生姜内酯(1),同时分离得到7个已知化合物,分别为6-姜烯酚(2),1-去氢姜二酮(3),6-姜磺酸(4),3,5-二酮-1,7-二-{(3-甲氧基-4-羟基)-苯基}-庚烷(5),姜酮A(6),β-谷甾醇(7)和豆甾醇(8)。  相似文献   

7.
油茶果壳化学成分研究   总被引:1,自引:0,他引:1       下载免费PDF全文
为了解油茶(Camellia oleifera Abel.)果壳中的化学成分,从其95%乙醇提取物中分离得到10个化合物。经波谱数据分析分别鉴定为:3α-菠菜甾醇(1)、麦角甾-4,6,8(14),22-四烯-3-酮(2)、(R)-de-O-metillasiodiplodin(3)、4′,5,7-三羟基二氢黄酮(4)、大黄素(5)、6-乙基-5-羟基-2,7-二甲氧基-1,4-萘醌(6)、ω-羟基大黄素(7)、macrophorin A(8)、negunfurol(9)、1-(3′,5′-二甲氧基)苯基-2-(4″-羟基)苯基乙烷(10)。化合物1~9为首次从油茶中分离得到,化合物2、3、5~9为首次从山茶属植物中分离得到。  相似文献   

8.
紫萁贯众为紫萁科(Osmundaceae)紫萁属植物紫萁(Osmunda japonica Thunb.)带叶柄残基的根茎.本文采用溶剂法及各种色谱方法从紫萁贯众乙酸乙酯部位分离得到6个化合物,通过理化性质和波谱数据分析,分别鉴定为1,7,9,11-四羟基-3-甲基-5,6-二氢-萘骈蒽醌(1),(E)-3,4-二羟基苯亚甲基丙酮(2),原儿茶酸(3),β-谷甾醇(4),β-胡萝卜苷(5)和二十六烷酸(6).化合物1为首次从植物界中得到,化合物2、3和6均为首次从紫萁属植物中分离得到.  相似文献   

9.
本文对香鳞毛蕨水提液进行大孔树脂柱色谱,用水、30%、60%、95%乙醇依次洗脱,从香鳞毛蕨30%乙醇组分中分离得到10个化合物,通过波普数据和理化性质分别鉴定为:5,7二羟基-2-羟甲基色原酮(1)、咖啡酸甲酯(2)、2S-圣草素-7-O-β-D-葡萄糖苷(3)、二氢松柏醇(4)、1,3-二羟基-5-丙基苯(5)、3β-羟基-5α,6α-环氧-7-大柱香波龙烯-9-酮(6)、2-羟基苯甲酸(7)、咖啡酸(8)、对羟基苯乙酮(9)、圣草素(10),以上化合物中4~10为首次从鳞毛蕨属植物中分离得到。  相似文献   

10.
为了解油榄仁(Terminalia bellirica Roxb.)的化学成分,从油榄仁果实的乙酸乙酯提取物中分离得到11个化合物,通过波谱分析,分别鉴定为:表松脂酚(1)、(–)-芝麻素(2)、麻醉椒苦素(3)、二氢醉椒素(4)、异香兰素(5)、3,4-二羟基苯甲酸(6)、没食子酸(7)、没食子酸甲酯(8)、没食子酸乙酯(9)、3,4,8,9,10-五羟基二苯骈[b,d]吡喃-6-酮(10)、polystachyol(11),其中化合物1~6、10和11为首次从油榄仁果实中分离得到。  相似文献   

11.
The methanol extract of the dried ripe fruits of Alpinia rafflesiana was investigated for its DPPH free radical scavenger constituents. 2',3',4',6'-Tetrahydroxychalcone (7), which has never been isolated from natural sources was found to be most active as a DPPH free radical scavenger with the IC50 value of 55 microM. Other known compounds isolated from this species include 5,6-dehydrokawain (1), flavokawin B (2). 1,7-diphenyl-5-hydroxy-6-hepten-3-one (3), (-)-pinocembrin (4), cardamonin (5) and (-)-pinostrobin (6). The DPPH free radical scavenger compounds were detected using TLC autographic analysis. The percentage inhibition of DPPH free radical scavenging activity was measured on isolates (5-7) using colorimetric analysis.  相似文献   

12.
Normal-phase column chromatography followed by semi-preparative reversed-phase HPLC has been used to isolate, from the rhizomes of Alpinia officinarum, five diarylheptanoids identified as 5-hydroxy-7-(4"-hydroxy-3"-methoxyphenyl)-1-phenyl-3-heptanone, 5-methoxy-7-(4"-hydroxy-3"-methoxyphenyl)-1-phenyl-3-heptanone, 7-(4"-hydroxyphenyl)-1-phenylhept-4-en-3-one, 7-(4"-hydroxy-3"-methoxyphenyl)-1-phenyl-hept-4-en-3-one, 1,7-diphenylhept-4-en-3-one. The levels of these five diarylheptanoids in root material were determined quantitatively by HPLC with UV detection and the assay methods so developed were simple, rapid and accurate. Four of the diarylheptanoids could also be detected by HPLC with electrochemical detection (ECD) in the oxidative mode, and ECD was found to have a higher sensitivity than photodiode array detection.  相似文献   

13.
Ma J  Jin X  Yang L  Liu ZL 《Phytochemistry》2004,65(8):1137-1143
Seven new diarylheptanoids, i.e., (3S,5S)-3,5-diacetoxy-1,7-bis(4-hydroxy-3-methoxyphenyl)heptane, (3R,5S)-3-acetoxy-5-hydroxy-1,7-bis(4-hydroxy-3-methoxyphenyl)heptane, (3R,5S)-3,5-dihydroxy-1-(4-hydroxy-3,5-dimethoxyphenyl)-7-(4-hydroxy-3-methoxyphenyl)heptane, (5S)-5-acetoxy-1,7-bis(4-hydroxy-3-methoxyphenyl)heptan-3-one, 5-hydroxy-1-(3,4-dihydroxy-5-methoxyphenyl)-7-(4-hydroxy-3-methoxyphenyl)heptan-3-one, 5-hydroxy-1-(4-hydroxy-3-methoxyphenyl)-7-(3,4-dihydroxy-5-methoxy-phenyl)heptan-3-one and 1,5-epoxy-3-hydroxy-1-(4-hydroxy-3,5-dimethoxyphenyl)-7-(4-hydroxy-3-methoxyphenyl)heptane were isolated from the rhizomes of Chinese ginger (Zingiber officinale Roscoe), along with 25 known compounds, i.e., 8 diarylheptanoids, 14 gingerol analogs, a diterpene and 2 steroids. Their structures were elucidated by spectroscopic and chemical methods.  相似文献   

14.
Phytochemical studies on Viscum coloratum have resulted in the isolation of nineteen compounds. The structures of the isolated compounds were identified on the basis of 1D, 2D NMR and HR-ESI-Q-TOF-MS. Pachypodol (4) and ombuine (6) were characterized in the family Loranthaceae for the first time. 1,7-Bis(4-hydroxyphenyl)-1,4-heptadien-3-one (8) and 5-hydroxy-3,7,3'-trimethoxyflavone-4'-O-beta-D-glucoside (13) were two new natural compounds, which exhibited cytotoxic activities against four human tumour cell lines (HeLa, SGC-7901, MCF-7, and U251).  相似文献   

15.
Phytochemicals and anti-inflammatory activity were investigated in the leaves of Pellacalyx saccardianus from the Rhizophoraceae family. The powdered leaves were extracted using methanol in a soxhlet extractor. Purification of the methanol extract yielded two new compounds, (3S)(6R)-3-(4′-hydroxybenzyl)-6-(6″-hydroxyphenethyl)-2,2-dimethyl-piperidin-4-one and 1,2-O-(1-methylethylidene)fucoside, together with six known compounds, β-amyrin palmitate, squalene, 24-ethylcholesta-5,22,25-trien-3β-ol, 5R-hydroxy-1,7-bis(5-hydroxyphenyl)heptan-3-one, 1,7-bis(4-hydroxyphenyl)hept-4-en-3-one and methyl-l-fucoside. An anti-inflammatory assay using COX-2 revealed that β-amyrin palmitate possessed the highest inhibitory effect (96.8%) at the lowest concentration (0.01 μM), which was higher than that of the positive controls, resveratrol (90.2%, 0.01 μM) and indomethacin (79.20%, 100 μM). This is the first report on the isolation of phytochemicals from the leaves of P. saccardianus and their anti-inflammatory activity.  相似文献   

16.
山姜素和豆蔻明的研究概况   总被引:1,自引:0,他引:1  
对山姜素(alpinetlin)和豆蔻明(cardamonin)在植物中的分布、药理作用等进行了综述,为其开发利用提供参考.  相似文献   

17.
The homoisoflavanone 5,7-dihydroxy-6-methoxy-3-(9-hydroxy-phenylmethyl)-chroman-4-one (1) and its structurally related 2',4',6'-trihydroxy-3'-methoxy-alpha-hydroxymethyl-beta-hydroxy-dihydrochalcone (2) along with the known pashanone (3), flavokawin B (4) and cardamonin or alpinetin chalcone (5) pinostrobin (6) and 5,8-dimethoxy-7-hydroxychroman-4-one (7) were isolated from dry leaves of Polygonum ferrugineum (Polygonaceae). To our knowledge, this is the first report of the isolation of a homoisoflavanone from the Polygonum genus and the Polygonaceae family, and could be an important chemotaxonomic finding. In addition, the pattern of substitution of this homoisoflavanone is different from others previously reported.  相似文献   

18.
Curcumin (1,7-bis(4-hydroxy-3-methoxyphenyl)-1,6-heptadiene-3,5-dione, 1) is a yellow ingredient isolated from turmeric (Curcumin longa). It has been shown to exhibit a variety of biological activities including antioxidative activity. In order to find more active antioxidants with 1 as the lead compound we synthesized curcumin analogues, i.e., 1,7-bis(3,4-dihydroxyphenyl)-1,6-heptadiene-3,5-dione (2), 1-(3,4-dihydroxyphenyl)-7-(4-hydroxy-3-methoxyphenyl)-1,6-heptadiene-3,5-dione (3), 1-(4-hydroxy-3-methoxyphenyl)-7-(4-hydroxyphenyl)-1,6-heptadiene-3,5-dione (4), 1,7-bis (4-hydroxyphenyl)-1,6-heptadiene-3,5-dione (5), 1-(3,4-dimethoxyphenyl)-7-(4-hydroxy-3-methoxyphenyl)-1,6-heptadiene-3,5-dione (6), 1,7-bis(3,4-dimethoxyphenyl)-1,6- heptadiene-3,5-dione (7), 1,7-bis(4-methoxyphenyl)-1,6-heptadiene-3,5-dione (8), and 1,7-diphenyl-1,6-heptadiene-3,5-dione (9). Antioxidative effects of curcumin and its analogues against free radical initiated peroxidation of human low density lipoprotein (LDL) were studied. The peroxidation was initiated either by a water-soluble initiator 2,2'-azobis(2-amidinopropane hydrochloride) (AAPH), or by cupric ion (Cu2+). The reaction kinetics were monitored either by the uptake of oxygen and the depletion of alpha-tocopherol present in the native LDL, or by the formation of thiobarbituric acid reactive substances. Kinetic analysis of the antioxidation process demonstrates that these compounds, except 7, 8, and 9, are effective antioxidants against AAPH- and Cu2+ -initiated LDL peroxidation by H-atom abstraction from the phenolic groups. Compounds 2 and 3 which bear ortho-diphenoxyl functionality possess significantly higher antioxidant activity than curcumin and other analogues, and the 4-hydroxy-3-methoxyphenyl group also play an important role in the antioxidative activity.  相似文献   

19.
Curcumin (1,7-bis(4-hydroxy-3-methoxyphenyl)-1,6-heptadiene-3,5-dione, 1) is a yellow ingredient isolated from turmeric (curcumin longa). It has been shown to exhibit a variety of biological activities including antioxidative activity. In order to find more active antioxidants with 1 as the lead compound we synthesized curcumin analogues, i.e., 1-(3,4-dihydroxyphenyl)-7-(4-hydroxy-3-methoxyphenyl)-1,6-heptadiene-3,5-dione (2), 1-(4-hydroxy-3-methoxyphenyl)-7-(4-hydroxyphenyl)-1,6-heptadiene-3,5-dione (3), 1,7-bis-(4-hydroxyphenyl)-1,6-heptadiene-3,5-dione (4), 1-(3,4-dimethoxyphenyl)-7-(4-hydroxy-3-methoxyphenyl)-1,6-heptadiene-3,5-dione (5), 1,7-bis(3,4-dimethoxyphenyl)-1,6-heptadiene-3,5-dione (6), and 1,7-diphenyl-1,6-heptadiene-3,5-dione (7), and evaluated their antioxidative activity. The in vitro oxidative damage to both lipids and proteins in rat liver mitochondria was used as a model to study the free radical-induced oxidative damage of biological lipids as well as proteins and the protective effects of these curcumin analogues. It was found that these compounds, except 6 and 7, could effectively inhibit the free radical induced lipid peroxidation and protein oxidative damage of rat liver mitochondria by H-atom abstraction from the phenolic groups. Compound 2 which bear ortho-diphenoxyl functionality exhibited remarkably higher antioxidative activity for lipids and proteins than curcumin and other analogues, and the 4-hydroxy-3-methoxyphenyl group also play an important role in the antioxidative activity.  相似文献   

20.
Efflux pumps are one of the well established mechanisms that contribute to antibiotic resistance in bacteria, such as mycobacteria. As a result, the identification of efflux pump inhibitors is an attractive target in antimicrobial therapy. The isolated compounds, three diarylheptanoids, trans,trans-1,7-diphenylhepta-4,6-dien-3-one (1), (5R)-trans-1,7-diphenyl-5-hydroxyhept-6-en-3-one (2), (3S,5S)-trans-1,7-diphenylhept-1-ene-3,5-diol (3) and the flavonoid pinocembrin (4), from Alpinia katsumadai, Zingiberaceae, were examined for their antimycobacterial activity and their synergistic effects with different antibiotics against M. smegmatis mc(2) 155. Furthermore, these compounds were evaluated as potential EtBr efflux inhibitors. Although they showed weak antimycobacterial activities (MIC ≥ 64 mg/L), especially compound 1 revealed a significant activity on the EtBr accumulation and efflux as well as a synergistic effect in combination with rifampicin.  相似文献   

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