艾纳香黄酮类化学成分的研究(英文)

从艾纳香(Blumea balsamiferaDC.)的地上部分中分离得到13个黄酮类化合物,经鉴定分别为5,7-二羟基-3,3′,4′-三甲氧基黄酮(1),3,5,3′,4′-四羟基-7-甲氧基黄酮(2),4,2′,4′-三羟基双氢查尔酮(3),儿茶素(4),阿亚黄素(5),davidioside(6),二氢槲皮素-7,4′-二甲醚(7),艾纳香素(8),二氢槲皮素-4′-甲醚(9),3,5,3′-三羟基-7,4′-二甲氧基黄酮(10),5,7,3′,5′-四羟基二氢黄酮(11),木犀草素(12),槲皮素(13)。其中化合物1和3~6为首次从该植物中分离得到。     

艾纳香地上部分化学成分及其抗氧化与酪氨酸酶抑制活性研究

本文对艾纳香(Blumea balsamifera DC.)中的化学成分及其抗氧化与酪氨酸酶抑制活性进行了研究。利用各种色谱手段和波谱学方法,从艾纳香地上部分分离得到18个化合物,分别鉴定为:7,3′,4′-三甲基槲皮素(1)、4′,5-二羟基-3′,7-二甲氧基黄酮(2)、木犀草素-7-甲醚(3)、鼠李素(4)、(2R,3R)-3,3′,5,7-四羟基-4′-甲氧基二氢黄酮(5)、(2R,3R)-二氢槲皮素-7-甲醚(6)、槲皮素(7)、木犀草素(8)、圣草酚(9)、异半皮桉苷(10)、异槲皮苷(11)、3-甲氧基槲皮素(12)、熊果酸(13)、熊果酸内酯(14)、过氧麦角甾醇(15)、2-羟基-4,6-二甲氧基苯乙酮(16)、2,4-二羟基-6-甲氧基苯乙酮(17)、丹参素甲酯(18)。其中化合物10、14和18为首次从艾纳香属植物中分离得到,化合物13为首次从植物艾纳香中分离得到。分别运用DPPH法及酪氨酸酶催化左旋多巴氧化速率法筛选化合物的体外抗氧化活性、酪氨酸酶抑制活性,发现化合物3～5、7～12、18有着较强的抗氧化性,化合物7、13、14、16、17有一定的酪氨酸酶抑制剂活性。     

艾纳香化学成分的研究

从艾纳香(Blumea balsamifera DC.)中分离得到12个化合物,通过理化性质和波谱数据分析分别鉴定为;商路素(1),花椒油素(2),2,4-二羟基-6-甲氧基苯乙酮(3),5,7-二羟基色原酮(4),金丝桃苷(5),异槲皮苷(6),3′,4′,5,7-四羟基-3-甲氧基黄酮(7),槲皮素(8),槲皮素-3′-甲氧基-3-O-β-D-半乳吡喃糖苷(9),4′,5,7-三羟基-3,3′-二甲氧基黄酮(10),3,5,7-三羟基-3′,4′-二甲氧基黄酮(11),木犀草素(12).其中,化合物3-7和9- 11为首次从该属植物中分离得到.     

外来入侵植物假臭草的黄酮类成分研究

从外来入侵植物假臭草的70%乙醇提取物的乙酸乙酯萃取物中分离得到5个黄酮化合物,利用波谱方法鉴定为5,6,7,4′-四甲氧基黄酮(1),7-羟基-5,6,4′-三甲氧基黄酮(2),4′-羟基-5,6,7-三甲氧基黄酮(3),5,4′-二羟基-6,7-二甲氧基黄酮(4),5,7,4′-三羟基-6-甲氧基黄酮(5).化合物1～5均首次从该植物中分离得到.     

苦槛蓝叶中的黄酮类化合物

为了解苦槛蓝(Myoporum bontioides A.Gray)的化学成分,采用色谱分离技术从苦槛蓝叶片中分离得到11个黄酮类化合物。通过波谱分析,他们的结构分别鉴定为:桔皮素(1)、甜橙素(2)、5,4′-二羟基-6,7,8,3′-四甲氧基黄酮(3)、4′,5,7,8-四甲氧基黄酮(4)、去甲基川陈皮素(5)、5-羟基-6,7,3′,4′-四甲氧基黄酮(6)、3′,4′,5,6,7,8-六甲氧基黄酮(7)、二氢山柰酚(8)、木犀草素(9)、3′,4′,5,7-四羟基-3-甲氧基黄酮(10)和芹黄素(11)。除化合物9之外,其他化合物均为首次从苦槛蓝叶片中分离得到。孢子萌发法测定结果表明,化合物1,2,8和9对香蕉炭疽菌(Colletotrichum musae)具有较好的抑菌活性。这为苦槛蓝叶片中有效成分的利用提供了理论依据。     

千里香化学成分研究CSCD

研究千里香的化学成分。采用硅胶、ODS、Sephadex LH-20、制备液相等多种色谱分离技术进行分离纯化,通过波谱数据分析进行结构鉴定。从千里香70%乙醇提取物中分离得到26个化合物,分别鉴定为千里香脂素(1)、8-去甲基川陈皮素(2)、ficusal(3)、lariciresinol-4′-monomethy ether(4)、(±)-5′-methoxy-4′-O-methyllariciresinol(5)、diospyrosin(6)、(-)-9′-O-E-feruloyl-lyoniresinol(7)、7-O-methylphellodenol-B(8)、欧芹烯酮酚甲醚(9)、3,4′-二羟基-3′,5′-二甲氧基苯丙酮(10)、4′-羟基-5,7-二甲氧基二氢黄酮(11)、5-羟基-6,7,3′,4′-四甲氧基二氢黄酮(12)、4′-羟基-5,7,3′-三甲氧基二氢黄酮(13)、5,7,3′,4′,5′-五甲氧基二氢黄酮(14)、2′,4-二羟基-3′,4′,6′-三甲氧基查尔酮(15)、2′,3-二羟基-4,4′,6′-三甲氧基查尔酮(16)、楝叶吴萸素B(17)、2′-羟基-3,4,5,4′,6′-五甲氧基查尔酮(18)、2′-羟基-3,4,4′,6′-四甲氧基查尔酮(19)、5,8-二羟基-6,7,3′,4′-四甲氧基黄酮(20)、3′-羟基-5,6,7,8,4′,5′-六甲氧基黄酮(21)、5,3′,5′-三羟基-7,4′-二甲氧基黄酮(22)、5,7,3′-三羟基-8,4′-二甲氧基黄酮(23)、3′-羟基-5,6,7,4′-四甲氧基黄酮(24)、5,7,3′,4′,5′-五甲氧基黄酮(25)、5-羟基-6,7,8,3′,4′-五甲氧基黄酮(26),其中化合物1、2为新化合物,化合物3~8、10~13、15、16、20~24为首次从九里香属植物中分离得到,化合物17为首次从千里香中分离得到。     

白木香树干中的黄酮类成分

从白木香[Aquilaria smensis(Lour.)Gilg]树干的乙醇提取物中分离得到5个黄酮类化合物,经波谱分析,分别鉴定为:洋芹素-7,4'-二甲醚(1)、5-羟基-7,3',4'-三甲氧基黄酮(2)、木犀草素-7,4'-二甲醚p)、芫花素(4)和4',5-二羟基-3',7-二甲氧基黄酮(5).以上化合物均为首次从该种植物树干中分离得到.     

山敲骨的化学成分研究

从云南民间药用植物山敲骨(Pseuderanthemum latifolim(vahl)B.Hansen)的茎叶中分离得到8个化合物,经波谱分析鉴定为尿囊素(allantoin,1),7,4′-二羟基黄酮(7,4-′dihydroxyflavone,2),5,4′-二羟基-7甲氧基黄酮(5,4-′dihydroxy-7-methoxyflavone,3),5,6-二羟基-3′,4′,7,8-四甲氧基黄酮(5,6-dihydroxy-3′,4′,7,8-tetramethoxyflavone,4),sitoindosideΙ(5),antirrinoside(6),stigmasterol(7),stigmasterol-3β-O-glucopyranoside(8)。     

蒙药漏芦花中黄酮类化合物的研究北大核心CSCD

采用大孔树脂柱色谱法及制备高效液相色谱法等分离手段从漏芦花中分离得到10个化合物,通过理化性质及波谱分析并结合文献对照分别鉴定为5,7,3'-三羟基-6,4'-二甲氧基黄酮(1)、5,7,3'-三羟基-4'-甲氧基黄酮(2)、芹菜素(3)、木犀草素(4)、槲皮素(5)、木犀草素-7-O-α-D-葡萄糖苷(6)、槲皮素-3-O-α-D-鼠李糖苷(7)、芹菜素-7-O-α-D-葡萄糖苷(8)、芦丁(9)、芹菜素-7-O-α-D-葡萄糖醛酸苷(10)。除化合物5外,其余化合物均为首次从该植物中分离得到。     

蒙药漏芦花中黄酮类化合物的研究

采用大孔树脂柱色谱法及制备高效液相色谱法等分离手段从漏芦花中分离得到10个化合物,通过理化性质及波谱分析并结合文献对照分别鉴定为5,7,3'-三羟基-6,4'-二甲氧基黄酮(1)、5,7,3'-三羟基-4'-甲氧基黄酮(2)、芹菜素(3)、木犀草素(4)、槲皮素(5)、木犀草素-7-O-α-D-葡萄糖苷(6)、槲皮素-3-O-α-D-鼠李糖苷(7)、芹菜素-7-O-α-D-葡萄糖苷(8)、芦丁(9)、芹菜素-7-O-α-D-葡萄糖醛酸苷(10)。除化合物5外,其余化合物均为首次从该植物中分离得到。     

Two new flavone glycosides from Cirsium lineare

An examination of four species of Cirsium disclosed the presence of two new flavonoids in C. lineare. The structure of one was 5,4′-dihydroxy-6,7,3′-trimethoxyflavone (cirsilineol) 4′-monoglucoside and the other 5,3′,4′-trihydroxy-6,7-dimethoxyflavone (cirsiliol) 4′-monoglucoside. Luteolin 7-glucoside was found in C. suffultum, and pectolinarin and linarin in C. kamtschaticum and C. pectinellum.     

Highly oxygenated flavones from Mentha piperita

Six highly oxygenated flavones have been isolated from the leaves of Mentha piperita. Five known compounds, 5-hydroxy-6,7,8,4′-tetramethoxyflavone, 5,4′-dihydroxy-6,7,8-trimethoxyflavone, 5,3′-dihydroxy-6,7,8,4′-tetramethoxyflavone, 5-hydroxy-6,7,8,3′,4′-pentamethoxyflavone and 5,3′,4′-trihydroxy-6,7,8-trimethoxyflavone, are reported for the first time in the genus Mentha. The sixth compound has been identified as 5,6-dihydroxy-7,8,3′,4′-tetramethoxyflavone by UV, NMR and mass spectra.     

Flavonols of parthenium section bolophytum

Casticin (V), 5,7,3′,4′-tetrahydroxy-3,6-dimethoxyflavone-7-glycoside (I), 5,7,4′-trihydroxy-6-methoxyflavone-7-glycoside (hispidulin 7-glycoside) (IV), 5,4′-dihydroxy-3,6,7,3′-tetramethoxyflavone (VII) and 5,7-dihydroxy-3,6,3′,4′-tetramethoxyflavone (XII) were found, with the coumarin scopoletin (IX), in various combinations in the three species of Parthenium section Bolophytum. No infraspecific variation was detected in these calciphilic relicts.     

Antioxidant and α-Amylase Inhibitory Compounds from Aerial Parts of Varthemia iphionoides Boiss

Various extracts of aerial parts of Varthemia (Varthemia iphionoides Boiss) were investigated for radical-scavenging activity, antioxidative activity, and porcine pancreas α-amylase inhibitory activity. The ethanol and water extracts showed a pronounced 1,1-diphenyl-2-picrylhydrazyl (DPPH) radical-scavenging activity, with inhibition of about 90% at a concentration of 100 μg/ml, and α-amylase inhibitory activity of about 70% at a concentration of 200 μg/ml by the 2-chloro-4-nitrophenyl α-maltotrioside (CNP-G₃) degradation method. The ethanol extract was purified by column chromatography to give seven 3-methoxyflavones (1–7) and eudesmane sesquiterpene, selina-4,11(13)-dien-3-on-12-oic acid (8). The structures of these compounds were established by NMR, MS, and UV spectroscopy. Of 3-methoxyflavones, 5,7,4′-trihydroxy-3,6-dimethoxyflavone (1), 5,7,4′-trihydroxy-3,3′-dimethoxyflavone (2), and 5,4′-dihydroxy-3,7,3′-trimethoxyflavone (3,7,3′-tri-O-methyl-quercetin) (7) exhibited pronounced radical-scavenging activity. The antioxidative activity in the linoleic acid system was considerable in compounds 1, 2, and 5,4′-dihydroxy-3,6,7-trimethoxyflavone (4). Compounds 1, 2, 4, 5 (5,7,4′-trihydroxy-3-methoxyflavone), and 6 (5,4′-dihydroxy-3,7-dimethoxyflavone) showed markedly high inhibitory activity against porcine pancreas α-amylase. Eudesmane sesquiterpene did not show any activity.     

Flavonols and coumarins from the fruit of Murraya omphalocarpa

Separation of the ethanolic extract of the fruit of Murraya omphalocarpa afforded a new flavonol, murrayanol, which was characterized as 5,4′-dihydroxy-3,6,7,3′,5′-pentamethoxyflavone, together with the known substances coumurrayin, mexoticin, 3,5,6,7,3′,4′,5′-heptamethoxyflavone, 5,7-dimethoxy-8-(3′-methyl-2′-oxobutyl) coumarin and sitosterol.     

Flavonoids from two Lonchocarpus species of the Yucatan Peninsula

Leaves, stem bark and root of Lonchocarpus xuul and Lonchocarpus yucatanensis were studied separately. A chalcone, 2',4-dimethoxy-6'-hydroxylonchocarpin (), and the flavones 5,4'-dihydroxy-3'-methoxy-(6:7)-2,2-dimethylpyranoflavone (2) and 5,4'-dimethoxy-(6:7)-2,2-dimethylpyrano-flavone (3), together with the known carpachromene (4), were isolated from the leaves of both species. Similarly, the previously reported flavans xuulanin (5) and 3beta-methoxyxuulanin (6), together with the novel 3beta,4beta,5-trimethoxy-4'-hydroxy-(6:7)-2,2-dimethylpyranoflavan (7), 3-hydroxy-4,5-dimethoxy-(6:7)-2,2-dimethyl-pyranoflavan (8), and 3,4-dihydroxy-5-methoxy-(6:7)-2,2-dimethylpyranoflavan (10), were isolated from the stem bark and root of both species. Finally, the known 2',4'-dihydroxy-3'-(3-methylbut-2-enyl) chalcone (13) was obtained from the root of L. xuul only. The structures of the various metabolites were established by interpretation of their spectroscopic data.     

Three highly oxygenated flavone glucuronides in leaves of Spinacia oleracea

Droplet counter-current chromatographic separation and subsequent TLC demonstrated the existence of at least 14 phenolics in the leaves of Spinacia oleracea. Three have now been isolated and identified, respectively, as the 4′-glucuronides of 5,7,4'-trihydroxy-3,6,3′-trimethoxyflavone (jaceidin), 5,3′,4′-trihydroxy-3-methoxy-6:7-methylene-dioxyflavone and 5,4′-dihydroxy-3,3′-dimethoxy-6:7-methylenedioxyflavone.     

Biflavonoids from the bark roots of Poincianella pyramidalis (Fabaceae)

Poincianella pyramidalis (Fabaceae) is an endemic tree that grows in semiarid regions of Brazil. Phytochemical investigations on the bark roots of this plant led to the isolation of four new biflavonoids named (+)-5-hydroxy-7,4′-dimethoxyflavone-3α-2′′′-hydroxy-4′′′,4′′-dimethoxydihydrochalcone (1), (+)-5,7-dihydroxy-4′-methoxyflavone-3α-2′′′-hydroxy-4′′′,4′′-dimethoxydihydrochalcone (2), (−)-7-hydroxy-4′-methoxyflavone-3α-2′′′,4′′′-dihydroxy-4′′-methoxydihydrochalcone (3), (−)-7,4′-dihydroxy-flavanone-3,8-5′′,6′′,4′′-trihydroxy-flavone (4), and the previously identified compound 4,2′,4′,4′′,2′′′,4′′′-hexahydroxy-3,5′′′-bichalcone (rhuschalcone VI, 5). Their structures were determined by HR-ESI-MS and extensive analyses of NMR spectroscopic data.     

石菖蒲的化学成分研究

运用色谱法从石菖蒲根茎提取物中分离得到18个化合物,经波谱学分析鉴定为:(7S,8R)-4,9’-di-hydroxyl-3,3’-dimethoxyl-7,8-dihydrobenzofuran-1’-propylneolignan(1),(7S,8R)-4,9’-dihydroxyl-3,3’-dimethoxyl-7,8-dihydrobenzofuran-1’-propylneoligan-9-O-β-D-glucopyranoside(2),7’-hydroxylariciresinol-9-acetate(3),5-羟基-3,7,4’-三甲氧基黄酮(4),野漆树苷(5),紫云英苷(6),松属素-3-O-芸香糖苷(7),山奈酚-3-O-芸香糖苷(8),德钦红景天苷(9),isoschaftoside(10),5-羟甲基糠醛(11),反式桂皮酸(12),3,7-dihydroxy-11,15,23-trioxo-lanost-8,16-dien-26-oicacid(13),3,7-dihydroxy-11,15,23-trioxo-lanost-8,16-dien-26-oic acid methyl ester(14),环阿屯醇(15),胡萝卜苷(16),羽扇豆醇(17),(22E,24R)-ergosta-5,7,22-trien-3β-ol(18)。除化合物4、11和16外,其余15个化合物均为首次从该植物中分离得到。