广豆根化学成分的研究

目的研究广豆根Sophora subprostrata Chunet T.Chen的化学成分。方法广豆根二氯甲烷提取物采用柱色谱、重结晶等方法进行分离纯化,根据理化性质和波谱数据鉴定所得化合物的结构。结果从中分离得到8个化合物,分别鉴定为广豆根素(1)、多花胡枝子素A——3(2)、L-高丽槐素(3)、光甘草酚(4)、lupinifolin(5)、5-hydroxysophoranone(6)、β-谷甾醇(7)、大豆皂醇B(8)。结论化合物1~6为黄酮类成分,化合物2为首次从该属植物中分离得到,化合物6和8为首次从该植物中分离得到。     

闹羊花中黄酮类成分研究

目的 研究闹羊花Rhododendron molle中的黄酮类成分.方法 利用各种柱色谱分离得到化合物,利用理化性质、波谱技术鉴定其结构.结果 从闹羊花中分离得到9个黄酮类化合物,分别鉴定为槲皮素(quercetin,I)、槲皮苷(quercitrin,II)、槲皮素-3-O-α-L-阿拉伯糖苷(quercetin-3-O-α-L-arabinoside,III)、槲皮素-3-O-β-D-半乳糖苷(quercetin-3-O-β-D-galactoside,IV)、quercetin 3-rhamnoside 2"-gallate(V)、山柰酚(kaempferol,Ⅵ)、山柰酚-7-O-α-L-鼠李糖苷(kaempferol-7-O-α-L-rhamnoside,Ⅶ)、山核桃素(caryatin,Ⅷ)和异鼠李素(isorhamnetin,IX).结论 此9个化合物均为首次从该植物中分离得到,其中化合物V、Ⅶ和Ⅸ为首次从闹羊花属中分离得到.     

淡竹叶黄酮类成分的研究

目的 研究淡竹叶Lophatherum gracile Brongn.黄酮类成分。方法 淡竹叶提取物采用ODS、MCI、Sephadex LH-20进行分离纯化,根据理化性质及波谱数据鉴定所得化合物的结构。结果 从中分离得到20个化合物,分别鉴定为芦丁(1)、槲皮素(2)、槲皮素-3-O-β-D-葡萄糖苷(3)、槲皮素-7-O-α-L-鼠李糖-3-O-β-D-芸香糖苷(4)、槲皮素-3-O-β-D-葡萄糖-(1-6)-O-α-L-鼠李糖-(1-2)-O-β-D-木糖糖苷(5)、槲皮素-3-O-β-D-葡萄糖-(1-2)-O-α-L-鼠李糖-(1-6)-O-β-D-葡萄糖-(1-2)-O-α-L-鼠李糖糖苷(6)、山柰酚(7)、山柰酚-3-O-β-D-芸香糖苷(8)、异鼠李素(9)、异鼠李素-3-O-β-D-芸香糖苷(10)、异鼠李素-3-O-β-D-芸香糖-(2-1)-O-β-D-葡萄糖苷(11)、异鼠李素-7-O-α-L-吡喃鼠李糖-3-O-β-D-芸香糖苷(12)、异鼠李素-3-O-β-D-葡萄糖苷(13)、异鼠李素-3-O-β-D-葡萄糖苷-1-烯-4-羰基-十二烷基(14)...     

药桑叶黄酮类成分的研究

目的研究药桑Morus nigra L.叶的黄酮类成分。方法采用大孔吸附树脂和HPLC制备柱,对药桑叶80%乙醇提取物的正丁醇部位进行分离纯化,通过波谱数据鉴定所得化合物的结构。结果从中分得11个化合物,分别鉴定为槲皮素(1)、淫羊藿次苷Ⅱ(2)、德钦红景天苷(3)、草质素-7-O-(3″-β-D-葡萄糖基)-α-L-鼠李糖苷(4)、槲皮素-3-O-β-(2″-O-乙酰基)吡喃半乳糖苷-7-O-α-吡喃阿拉伯糖苷(5)、红景天苷(6)、山柰酚-3-O-β-(2″-O-α-L-吡喃鼠李糖基)-葡萄醛酸苷(7)、槲皮素-3-O-α-吡喃鼠李糖基(1→2)-β-吡喃葡萄醛酸苷(8)、鼠李素-3-O-半乳糖苷(9)、槲皮素-3'-O-β-D-葡萄糖苷(10)、槲皮素-3-O-β-D-吡喃葡萄糖苷(11)。结论化合物1~10为首次从该植物中分离得到。     

槐枝皮中黄酮类成分研究

目的:研究槐(Sophora japonica L.)枝皮中的化学成分。方法:采用硅胶柱反复层析、Sephadex LH-20层析等技术手段分离纯化单体,通过理化常数测定和光谱分析鉴定其化学结构。结果:从槐枝皮正丁醇萃取部分共分得8个化合物,它们的结构确定为槲皮素(quercetin,I)、山柰酚(kaempferol,II)、染料木素(genistein,III)、染料木素7,4′-二葡萄糖苷(genistein7,4′-di-O-β-D-glucoside,IV)、槐属双苷(sophorabioside,V)、樱黄素4′-O-β-D-葡萄糖苷(prunetin4′-O-β-D-glucoside,VI)、槐属苷(sophororicoside,VII)、染料木苷(genistin,VIII)。结论:这些化合物均为首次从槐枝皮中分离得到,为进一步的活性筛选奠定了基础。     

沙戟中黄酮类成分的研究

目的:对新疆产沙戟的黄酮类活性成分进行研究。方法:采用95%乙醇提取及各种柱色谱法分离,光谱技术鉴定结构。结果:分离得到7个黄酮类化合物,经光谱方法分别鉴定为槲皮素(Ⅰ),山柰酚(Ⅱ),芹菜素(Ⅲ),柯伊利素(Ⅳ),异槲皮苷(Ⅴ),柯伊利素-7-O-β-D-葡萄糖苷(Ⅵ),槲皮素-3-O-α-D-阿拉伯糖苷(Ⅶ)。结论:上述化合物均首次从沙戟属中分离得到。     

南岭栲叶黄酮类成分的研究

目的研究南岭栲Castanopsis fordii Hance叶的黄酮类成分。方法南岭栲叶80%乙醇提取物采用Sephadex LH-20、MCI、硅胶、半制备柱进行分离纯化,根据波谱数据鉴定所得化合物的结构。结果从中分离得到9个化合物,分别鉴定为槲皮素(1)、槲皮素-3-O-α-L-鼠李糖苷(2)、杨梅苷(3)、myricetin-3-O-(2″-O-galloyl)-α-rhamnopyranoside(4)、quercetin 3-O-(2″-O-galloyl)-α-rhamnopyranoside(5)、阿福豆苷(6)、3,5,7,3',5'-五羟基-(2R,3R)-二氢黄酮3-O-α-L-鼠李糖苷(7)、落新妇苷(8)、异落新妇苷(9)。结论化合物2、3为首次从该植物中分离得到,化合物1、4~9为首次从锥属植物中分离得到。     

荔枝草中黄酮类成分的研究

 目的对荔枝草的黄酮类成分进行研究。方法利用柱色谱方法分离纯化化合物,运用光谱方法进行结构鉴定。结果从荔枝草体积分数95%乙醇提取物中分离得到6个化合物,分别鉴定为5-羟基-4′,7-二甲氧基-异黄酮(1)、高车前素(2)、泽兰黄酮(3)、高车前苷(4)、(2S)-5,7,4′-三羟基-6-甲氧基-二氢黄酮-7-O-β-D-吡喃葡萄糖苷(5)和假荆芥属苷(6)。结论化合物5为新的二氢黄酮苷,化合物1和5为首次从荔枝草中分离得到。     

翠云草中黄酮类成分的研究

采用大孔吸附树脂、聚酰胺柱、正相硅胶柱、Sephadex LH-20柱色谱以及制备高效液相色谱等分离纯化方法,从翠云草75%乙醇提取物中分离得到9个化合物,根据化合物的理化性质和光谱方法鉴定其结构分别为:滨蓟黄苷(1)、印度荆芥苷(2)、芹菜素-6-C-α-L-吡喃阿拉伯糖-8-C-β-D-吡喃葡萄糖苷(3)、芹菜素-6-C-β-D-吡喃葡萄糖-8-C-α-L-吡喃阿拉伯糖苷(4)、芹菜素-7-O-β-D-吡喃葡萄糖苷(5)、2,3-二氢穗花杉双黄酮(6)、4'-甲氧基穗花杉双黄酮(7)、2,3-二氢-4'-甲氧基穗花杉双黄酮(8),2,3,2",3"-四氢-4'-甲氧基罗波斯塔双黄酮(9),化合物 1~5 为黄酮苷类化合物,并且均为首次从卷柏属植物中分离得到,化合物7为首次从翠云草中分离得到。     

罗布麻叶黄酮类成分的研究

目的：对罗布麻叶黄酮类成分进行研究。方法：利用反复的聚酰胺柱色谱分离和Sephadex LH-20柱色谱纯化,通过波谱分析鉴定化合物的结构。结果：分离并鉴定6个化合物,分别是：槲皮素(1),山柰酚(2),山柰酚-3-O-(6″-O-乙酰基)-β-D-吡喃葡萄糖苷(3),槲皮素-3-O-(6″-O-乙酰基)-β-D-吡喃葡萄糖苷(4),槲皮素-3-O-(6″-O-乙酰基)-β-D-吡喃半乳糖苷(5),山柰酚-7-O-α-L-吡喃鼠李糖苷(6)。结论：化合物5,6为首次从该属中分离得到。     

山豆根多糖的性质和化学组成

 目的研究山豆根中各种水溶性多糖的性质、组成和类型。方法山豆根脱脂后,用热水,1mol·L^-1NaOH,2.5 mol·L^-1NaOH依次进行提取,分离纯化,进行组成分析和性质测定。结果共分离得到8种均一的多糖：山豆根水提多糖Ssa^-1,Ssa^-2,Ssa^-3,Ssa^-4,山豆根碱提多糖SSb-1FA, SSb^-2,SSb^-3和SSc^-1,根据组成和性质,它们分属于5种结构类型。结论山豆根中的可溶性多糖包括：淀粉、类淀粉、半纤维素、果胶,其中淀粉的含量最多,其次为果胶类多糖。     

Flavonoids from Sophora moorcroftiana and their Synergistic Antibacterial Effects on MRSA

Synergy is now a widely recognized approach that has direct applicability for new pharmaceuticals. The ethanolic extract of the aerial parts of the herb Sophora moorcroftiana showed significant antibacterial activity against drug‐resistant Staphylococcus aureus, and its minimum inhibitory concentration (MIC) was 8 µg/mL. In a phytochemical study of the extract, five flavonoids were obtained. However, the isolates exhibited antibacterial activity in the range of 32–128 µg/mL, which was weaker than the extract. In combination with antibiotics, the antibacterially inactive compound genistein (1) and diosmetin (4) showed significant synergistic activity against drug‐resistant S. aureus. In combination with norfloxacin, genistein (1) reduced the MIC to 16 µg/mL and showed synergy against strain SA1199B with a fractional inhibitory concentration index (FICI) of 0.38. With the antibiotics norfloxacin, streptomycin and ciprofloxacin, diosmetin (4) showed synergy against SA1199B, RN4220 and EMRSA‐15, with FICI values of 0.38, 0.38 and 0.09, respectively. In an efflux experiment to elucidate a plausible mechanism for the observed synergy, genistein showed marginal inhibition of the NorA efflux protein. Copyright © 2013 John Wiley & Sons, Ltd.     

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??OBJECTIVE To study the chemical constituents of the total flavonoids from Sophora flavescens and establish a method for simultaneous determination of seven compounds. METHODS The compounds were isolated by chromatography on silica gel and ODS column and their structures were elucidated by spectroscopic analysis. The samples were analyzed on a Dikma C₁₈ column (4.6 mm??250 mm,5 ??m); gradient elution was performed using mobile phase composed of methanol (A)and water (B); the detection was carried out using a photodiode array detector at 280 nm. RESULTS Seven compounds were isolated and their structures were identified as kuratidine (1), sophoraflavanone G (2), kurarinone (3), isoanhydroicaritin (4), isoxanthohumol (5), formononetin (6), and trifolirhizin (7). The calibration curve was linear within 8.70-87.00, 44.25-442.50, 128.10-1 281.00, 9.40-94.00, 48.40-484.00, 14.20-142.00, and 25.70-257.00 ??g??mL^-1 for kuraridine, sophoraflavanone G, kurarinone, isoanhydroicaritin, isoxanthohumol, formononetin, and trifolirhizin, respectively (r>0.999 0), and the extraction recoveries varied from 95% to 105%. CONCLUSION The main chemical components contributing to antibacterial activity of total flavonoids may be sophoraflavanone G, kurarinone, and isoxanthohumol. The method is simple, rapid, accurate, and can be used simultaneously to determine the contents of the seven active ingredients.     

苦参中黄酮类成分薄层色谱鉴别研究△

目的：研究苦参的薄层色谱鉴别特征,建立苦参薄层色谱鉴别的专属性方法。方法：采用乙酸乙酯为提取溶剂,超声处理样品,硅胶G板分离鉴别苦参中黄酮类成分。结果：薄层色谱检出苦参酮、苦参醇Ⅰ、三叶豆紫檀苷、高丽槐素和槐属二氢黄酮G,色谱斑点清晰,能有效提供苦参的鉴别特征。结论：方法可行,重复性好,专属性强,为完善苦参薄层鉴别方法提供了实验资料和科学依据。     

苦参中总黄酮提取工艺研究

目的:对苦参总黄酮提取工艺进行优化研究。方法:通过单因素实验和正交实验,考察回流提取法中乙醇体积分数、提取温度、时间、次数和料液比对总黄酮提取率的影响,确定最佳工艺条件。结果:总黄酮的最佳提取工艺为80℃水浴中用20倍量80%乙醇回流提取1次,提取时间为60min。结论:该提取方法对总黄酮有稳定、重现和较高的提取效率。     

Quinolizidine alkaloids from Sophora alopecuroides

A new matrine-type alkaloid, 7alpha-hydroxysophoramine (1), was isolated from the aerial parts of Sophora alopecuroides together with eight known alkaloids, 12beta-hydroxysophocarpine (2), sophoramine (3), 14beta-hydroxymatrine, matrine, sophoridine, sophocarpine, adenocarpine, and baptifoline. The structures of compounds 1-3 were confirmed through single-crystal X-ray diffraction analysis.     

Isoflavone tetraglycosides from Sophora japonica Leaves

Two new isoflavone tetraglycosides ( 1 and 2) and six known compounds were isolated from the leaves of Sophora japonica. The new glycosides are genistein 7- O-beta- d-glucopyranoside-4'- O-(6'- O-alpha- l-rhamnopyranosyl)-beta-sophoroside ( 1) and genistein 7- O-alpha- l-rhamnopyranoside-4'- O-(6'- O-alpha- l-rhamnopyranosyl)-beta-sophoroside ( 2). The structures of compounds 1 and 2 were established primarily by NMR experiments and chemical methods, and they are the first reported naturally occurring isoflavone glycosides with four attached sugar residues.     

Cytotoxic lavandulyl flavanones from Sophora flavescens

Two new lavandulylated flavanones, (2S)-2'-methoxykurarinone (1) and (-)-kurarinone (2), were isolated from the root of Sophora flavescens, together with two known lavandulyl flavanones, sophoraflavanone G (3) and leachianone A (4), and two known isoflavonoids, formononetin and l-maakiain. The structures of 1 and 2 were determined on the basis of optical rotation and spectral evidence and by comparison with known compounds. Compounds 1-4 exhibited cytotoxic activity against human myeloid leukemia HL-60 cells.