百两金根的化学成分研究

目的 百两金为传统苗药,其化学成分的有关研究报道较少,本研究目的在于研究百两金的化学成分。方法 将百两金干燥根体积分数70%乙醇提取物利用硅胶、重结晶、ODS及制备/半制备HPLC进行分离纯化,根据理化性质及波谱数据对所得化合物结构进行鉴定。结果 从百两金根中得到了20个化合物。分别为岩白菜素 (1)、甲基岩白菜素 (2)、11-O-没食子酰岩白菜素 (3)、 syringin (4)、(+)-syringaresinol-O-β-D-glucopyranoside (5)、(-)-(7R,8S,7′R,8′S)-4,9,4′,9′-tetrahydroxy-3,3′-dimethoxy-7,7′-epoxylignan-9-O-β-D-xylopyranoside (6)、saracoside (7)、isolariciresinol-4-O-β-D-glucopyranoside (8)、(7S,8R)-urolignoside (9)、staphylionoside D (10)、蚱蜢酮 (11)、l-borneol 6-O-β-D-aiosyl-β-D-glucoside (12)、(+)-angelicoidenol 2-O-β-D-glucopyranoside (13)、牡荆素-2″-O-鼠李糖苷 (14)、根皮苷 (15)、phenethyl alcohol β-D-(2′-O-β-D-glucopyranosyl)glucopyranoside (16)、phenylethyl-β-D-glucopyranoside (17)、菖蒲碱C (18)、己内酰胺 (19)、蔗糖 (20)。结论 其中化合物5~19为首次从紫金牛科植物中分离得到,化合物4为首次从紫金牛属植物中分离得到,化合物2和3为首次从该植物中分离得到。其中化合物6是自国内学者2013年从岭南杜鹃分离得到以来第二次被分离得到。     

狼毒大戟化学成分及其生物活性研究

目的 研究狼毒大戟(Euphorbia fischeriana Steud)根部的抗肿瘤化学成分。方法 运用硅胶柱、ODS、Sephadex LH-20柱色谱以及制备HPLC等多种方法对狼毒大戟根部的体积分数95%乙醇提取物进行分离纯化,并利用HR-ESI-MS、NMR等波谱技术对分离得到的化合物进行结构鉴定。运用CCK-8检测法测定分离得到的化合物对人肝癌细胞Hep-G2、人乳腺癌细胞MCF-7和人肺癌细胞A549的细胞毒活性。结果 从狼毒大戟中共分离得到12个化合物,分别鉴定为7-oxocallitrisic acid(1)、ent-12-hydroxy-12[R]-abieta-8(14),13(15)-dien-16,12-olide(2)、13β-hydroxy-7-oxoabiet-8(14)-en-19,6β-olide(3)、decandrol A(4)、daphneaine B(5)、二氢红花菜豆酸(6)、phenethyl-6-O-α-L-arabinofuranosyl-β-D-glucoside(7)、2-(4-hydroxyphenyl)ethyl-O-α-L-arabinofuranosyl-(1→6)-O-β-D-glucopyranoside(8)、γ-pyrone-2-O-β-D-(6-galloyl)-glucopyranoside(9)、6-hydroxy-2-methoxy-4-O-α-L-arabinofurano-syl(1→6)-β-D-glucopyranoside(10)、(2,3-trans,4E)-2,3-methano-4-decen-1-ol)(11)和3, 4′-O-dimethylellagic acid(12)。结论 化合物1,4,5,7～9和11为首次从大戟属植物中分离得到,化合物1,2,4～9,11和12为首次从狼毒大戟中分离得到。化合物2对人肝癌细胞Hep-G2表现出较好的细胞毒活性,其半数抑制浓度(half maximal inhibitory concentration,IC₅₀)值为32.81 μmol·L^-1,提示该类二萜化合物可能与狼毒大戟的抗肿瘤活性相关。     

黄花中华苦荬菜化学成分研究

目的 研究干燥黄花中华苦荬菜全草的化学成分。方法 采用硅胶柱色谱、HPLC、重结晶等方法进行分离纯化,依据理化性质和波谱数据鉴定结构。结果 从黄花中华苦荬菜全草中分离得到15 个化合物,分别鉴定为chinensioide F(1),chinensioide C(2),胡萝卜苷(3),6′-对羟基苯乙酰基-ixerin D(4),对羟基苯乙酸甲酯(5),对羟基苯乙醇(6),3,5-二甲氧基-4-羟基苯丙醇(7),10α-羟基-愈创木烷-12,6-内酯-3-酮(8),β-谷甾醇(9),chinensioide E(10),chinensioide D(11),ixerochinoside(12),3β,10α-二羟基-4(15),11(13)-愈创木二烯-12,6-内酯(13),10α-羟基-11βH-4(15)-愈创木烯-12,6-内酯(14),木犀草素-7-O-β-D-葡萄糖苷(15)。结论 化合物1为新化合物,命名为chinensiode F,4~7、12~14首次从该植物中分离得到。     

长叶纽子果根化学成分的研究

目的 研究长叶纽子果根(Ardisia virens Kurz var. annamensis Pitard.)的化学成分。方法 长叶纽子果根体积分数70%乙醇提取物采用硅胶柱、Sephadex LH-20、ODS、制备液相进行分离纯化,根据波谱信息鉴定所得化合物的结构。结果 在长叶纽子果根中分离得到10个化合物,分别鉴定为11-O-咖啡酸岩白菜素(1)、11-O-(3',4'-二甲基没食子酰基)岩白菜素(2)、11-O-乙酰岩白菜素(3)、岩白菜素-11-O-α-D-半乳吡喃糖苷(4)、百两金皂苷B(5)、朱砂根皂苷D(6)、朱砂根皂苷G(7)、(+)-丁香树脂酚(8)、丁香酸(9)、十八碳癸二烯酸-2,3-二羟丙基酯(10)。结论 化合物1~10为首次从该植物中分离得到。     

蛹虫草活性成分的提取分离及体外抗氧化作用研究

目的 以抑制蛋白酪氨酸磷酸酶1B(PTP1B)活性为导向,筛选蛹虫草子实体有效部位,分离纯化单体化合物,并检测其体外抗氧化作用。方法 通过硅胶色谱柱,半制备高效液相等色谱技术对蛹虫草子实体进行分离纯化,检测各组分对PTP1B的抑制活性;应用核磁碳谱、氢谱数据分析鉴定单体化合物结构;利用MTT法检测单体化合物对PC12细胞的增殖作用,及其对过氧化氢(H₂O₂)损伤的PC12细胞存活率的影响,试剂盒检测单体化合物对细胞乳酸脱氢酶(LDH)、超氧化物歧化酶(SOD)活性及丙二醛(MDA)含量的影响。结果 发现5个对PTP1B具有较强抑制作用的活性成分,将其中活性最高的成分进一步分离纯化,获得单体化合物,经鉴定为β-D-吡喃葡萄糖基-9-甲基-4,8鞘氨醇(5),其对PTP1B具有较强的抑制活性,半抑制浓度(IC₅₀)为(3.42±0.59) μmol·L^-1。该单体化合物对H₂O₂诱导的PC12细胞氧化损伤具有明显的保护作用。结论 首次以抑制PTP1B活性为导向,在蛹虫草中分离得到脑苷脂类单体化合物,其具有抑制PTP1B作用和体外抗氧化活性,为蛹虫草用于糖尿病的预防和治疗奠定理论基础。     

鳞腺杜鹃化学成分的研究

目的:研究藏产鳞腺杜鹃地上部分的化学成分。方法:利用多种色谱方法对其成分进行分离纯化,通过理化性质及NMR、MS波谱数据解析鉴定化合物的结构。结果:从中分离得到18个化合物,分别鉴定为:何帕醇-B(1),羽扇豆醇(2),熊果酸(3),扁蓄苷(4),槲皮素(5),杨梅素(6),金丝桃苷(7),杨梅素-3’-O-β-D-吡喃木糖苷(8),(+)-花旗松素-3-O-α-L-吡喃阿拉伯糖苷(9),(+)-花旗松素-3-O-β-D-吡喃葡萄糖苷(10),lyoniside(11),confluentin(12),2-(4-hydroxyphe-nyl)-ethyl triacontanoate(13),2,6-二甲氧基-4-羟基苯酚-1-O-β-D-吡喃葡萄糖苷(14),(-)-2-羟基-5-(2-羟乙基)苯-O-β-D-吡喃葡萄糖苷(15),(-)-isolariciresinol(16),isofraxoside(17),2,4,6-trihydroxacetophenone-3,5-di-C-β-D-glucoside(18)。结论:化合物1,13-18为首次从杜鹃花属植物中分离得到,其余化合物均为首次从该种植物中分离得到。     

秀雅杜鹃中的二氢黄酮类成分

目的:研究秀雅杜鹃的化学成分。方法:利用硅胶色谱和聚酰胺色谱技术分离纯化,通过理化性质和波谱方法鉴定化合物的结构。结果:从秀雅杜鹃的乙酸乙酯部分分离鉴定了5个二氢黄酮类化合物,分别鉴定为(2R)-杜鹃素-7-O-β-D-葡萄糖苷(1),(2R,3R)-(-)-二氢槲皮素-3-O-β-D-木糖苷(2),(2S,3S)-(-)-二氢槲皮素-3-O-β-D-葡萄糖苷(3),北美圣草素-7-O-β-D-葡萄糖苷(4),(2R,3R)-(+)-二氢槲皮素(5)。结论:除化合物5外,其余化合物均为首次从该属植物中分离得到。     

苍耳子中苯丙素类化学成分的研究

目的 研究菊科植物苍耳(Xanthium sibiricum Patrin ex Widder)的干燥成熟带总苞的果实(苍耳子)中苯丙素类化学成分。方法 采用正相硅胶柱色谱、反相十八烷基硅烷键合硅胶(ODS)柱色谱、Sephadex LH-20凝胶柱色谱和半制备高效液相色谱(HPLC)等色谱方法进行分离纯化,并结合高分辨质谱(HR-ESI-MS)、核磁共振(NMR)对分离得到的化合物进行结构鉴定。采用脂多糖(LPS)诱导的巨噬细胞RAW 264.7为筛选模型评价分离得到化合物的抗炎活性。结果 从苍耳子体积分数95%乙醇提取物的乙酸乙酯萃取物中分离并鉴定了24个苯丙素类化合物,分别为c-藜芦酰乙二醇(1)、3,4'-二羟基-3'-甲氧基苯丙酮(2)、阿魏醛(3)、丁香脂素(4)、蛇菰宁(5)、落叶松脂醇(6)、愈创木基甘油(7)、3-hydroxy-l-(4-hydroxy-3,5-dimethoxyphenyl)-1-propanone(8)、salicifoliol(9)、6-(4-hydroxy-3-methoxyphenyl)-3,7-dioxabicyclo[3.3.0]octan-2-ol(10)、榕醛(11)、jatrointelignan D(12)、icariol A₂(13)、异落叶松脂素(14)、ehletianol C(15)、(7R,7'R,7”S,7‴S,8S,8'S,8”S,8‴S)-4”,4‴-dihydroxy-3,3',3”,3‴,5,5'-hexamethoxy-7,9';7',9-diepoxy-4,8”;4',8‴-bisoxy-8,8'-dineolignan-7”,7‴,9”,9‴-tetraol(16)、(7R,7'R,7”R,7‴S,8S,8'S,8”S,8‴S)-4”,4‴-dihydroxy-3,3',3”,3‴,5,5'-hexamethoxy-7,9';7',9-diepoxy-4,8”;4',8‴-bisoxy-8,8'-dineolignan-7”,7‴,9”,9‴-tetraol(17)、2-(4-hydroxy-3-methoxyphenyl)-1-(4-hydroxyphenyl)-propan-1,3-diol(18)、2,3-bis-(4-hydroxy-3-methoxyphenyl)-3-methoxypropanol(19)、楝叶吴萸素B(20)、threo-guaiacylglycerol-8-vanillin ether(21)、erythro-guaiacylglycerol-8-vanillin ether(22)、黄花菜木脂素B(23)和27-对香豆酰氧基熊果酸(24)。结论 化合物6~24为首次从苍耳中分离得到。对分离得到的24个化合物进行抗炎活性筛选,其中,化合物14、21和23具有抗炎活性,其IC₅₀值分别为(28.14±1.89),(16.78±0.68)和(38.42±2.15)μmol·L^-1。     

蜘蛛香炮制品的化学成分和抗炎活性研究

目的 研究蜘蛛香炮制品的化学成分及其抗炎活性。方法 采用正相硅胶柱色谱、羟丙基葡聚糖凝胶(Sephadex LH-20)、ODS和高效液相色谱(HPLC)等多种分离材料和方法进行分离纯化,通过理化性质及波谱数据鉴定化合物结构,采用脂多糖(LPS)诱导的RAW264.7细胞体外炎症模型,以总一氧化氮合成酶抑制剂(L-NMMA)作为阳性对照,对化合物进行体外抗炎活性评价。结果 从蜘蛛香炮制品的乙酸乙酯相共分离鉴定了25个化合物,分别为(3S,4R,5S,7S,8S,9S)-3,8-环氧-7-羟基-4,8-二甲基全氢环戊基[c]吡喃(1)、(3S,4S,5S,7S,8S,9S)-3,8-环氧-7-羟基-4,8-二甲基全氢环戊基[c]吡喃(2)、去酰基缬草醛(3)、缬草醛(4)、8-羟基-7′-表松脂醇(5)、(+)-表松脂醇(6)、青刺尖木脂醇(7)、 (7R,8S,7′R,8′S)-5-甲氧基青刺尖木脂醇(8)、(-)-松脂醇(9)、绿原酸(10)、橙皮素(11)、3,8-二羟基-2-甲基色原酮(12)、penicisochroman J(13)、2,5-二(4-羟基-3-甲氧基苯基)-1,4-二烷(14)、4,4′-二羟基-3,3′-二甲氧基-反式-1,2-二苯乙烯(15)、对苯二酚(16)、4-羟基-3-甲氧基苯甲醛(17)、乙酰香草酮(18)、4-羟基-3-甲氧基桂皮醛(19)、2,3-二羟基-1-甲氧基苯(20)、5-羟甲基-2-呋喃甲醛(21)、5-乙酰糠醇(22)、5-[(5-(hydroxymethyl)furan-2-yl)methoxymethoxymethyl]furan-2-carbaldehyde(23)、5-({5-[(5-(hydroxy methyl)furan-2-yl)methoxy(methoxymethyl)]-furan-2-yl} methoxy(methoxymethyl)) furan-2-carbaldehyde(24)和6-羟基-2H-吡喃-3-醛(25)。其中,化合物3,15,16和19均能够显著抑制RAW264.7细胞中脂多糖诱导的一氧化氮生成,且呈显著的剂量依赖性,表现出潜在的抗炎活性。结论 炮制后的蜘蛛香化合物结构类型涉及环烯醚萜及其降解产物、苯丙素、黄酮、色原酮、芳香衍生物和糠醛衍生物等。在炮制过程中,主要是环烯醚萜和单糖的结构发生了变化;化合物 5、6、9~25均为首次从蜘蛛香中分离得到,其中,化合物3,15,16和19具有抗炎活性,半数抑制浓度(IC₅₀)值分别为29.04、10.77、6.37和10.98 μmol·L^-1。     

九节菖蒲化学成分研究

目的研究九节菖蒲的化学成分.方法对九节菖蒲乙醇提取物的正丁醇萃取部分进行色谱分离,根据光谱数据和理化性质确定各化合物的结构.结果分离并鉴定了6个化合物,分别为升麻醇木糖苷(1),升麻醇-3-O-β-D-吡喃木糖(1→3)-β-D-吡喃木糖苷(2),( )异落叶松脂醇-9-O-β-D-葡萄糖苷(3),腺苷(4),尿苷(5),β-D-葡萄糖甲醇苷(6).结论6个化合物均为首次从本属植物中分离得到.     

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??OBJECTIVE To study the chemical constituents of the aqueous extract from the aerial part of Sibiraea angustata. METHODS The constituents were isolated by various chromatographic techniques(HP-20 macroporous absorption resin, Sephadex LH-20 gel, Reverse-phase silical gel and PHPLC) and their structures were determined on the basis of physicochemical properties and their spectroscopic data, as well as the literatures. RESULTS Twelve compounds were separated and identified as veratric acid(1),(+)-cycloolivil(2), 3,7-dimethyl-3(E)-6-octadien-5-one-1-O-??-D-glucoside(3), 3,7-dimethyl-3(Z)-6-octadien-5-one-1-O-??-D-glucoside(4), 1-O-??-D-glucopyranosyl(1??2)-??-D-glucopyranosyl-3,7-dimethyl-2(E)-6-heptdiene(5),(7R,8S)-dihydrodehydrodiconiferyl alcohol-9??-O-??-D-glucopyranoside(6),(+)-1-hydroxypinoresinol-1-??-D-glucoside(7), skimmin(8), kaempferol 3-O-??-L-arabinopyranosyl-(1??6)-??-D-galactopyranoside(9), isorhamnetin-3-O-??-D-galactopyranosyl(1??6)-??-D-glucopyranoside(10), isorhamnetin 3-O-??-arabinopyranosyl-(1??6)-??-galactopyranoside(11), and quercetin 3-O-[2''-O-(E)-caffeoyl]-??-L-arabinopyranosyl-(1??6)-??-D-galactopyranoside(12). CONCLUSION All compounds are obtained from the genus of Sibiraea for the first time.     

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??OBJECTIVE To study the chemical constituents of Yao medicine, Zhongliuteng, the stems of Pileostegia tomentella. METHODS The chemical constituents were isolated and purified by silica gel chromatography repeatedly, and their structures were identified by spectral analysis and chemical METHODS. RESULTS Thirteen compounds were isolated from the stems of P. tomentella and the structures were identified as 1-O-(??-D-glucosyl)-2-[2-methoxy-4-(??-hydroxypropyl) phenoxy]propan-3-ol(1),(+)-lyoniresinol-3a-O-??-D-glucopyranoside (2),syringin (3),coniferin (4),dihydroconiferin (5),but-3-enyl-??-D-glucoside (6),4-(2,3-dihydroxypropyl)-2,6-dimethoxy phenyl ??-D-glucopyranoside (7),nikoenoside (8),protocatechuic acid ethyl ester (9),8-methoxy coumarin-7-O-??-D-glucopyranoside (10),6-O-R-L-rhamnopyranosyl-??-D-glucopyranoside methyl salicylate (11), nicotinamide (12), and 3,5-di-O-caffeoyl quinicacid methyl ester (13). CONCLUSION All compounds were obtained from the genus for the first time.     

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??OBJECTIVE To investigate the liposoluble constituents of Urticae Rhizoma. METHODS The compounds were isolated and purified by silica gel, Sephadex LH-20, ODS gel column chromatographies, and semi-preparative HPLC. The structures were elucidated on the basis of spectral data and physiochemical properties. RESULTS Twenty-one compounds were isolated from the ethyl acetate fraction of Urticae Rhizoma, and identified as(-)-urticol(1),(-)-secoisolariciresinol(2), 23-hydroxybetulinic acid(3), 2??,3??, 24-trihydroxy-12-oleanen-28-oic acid(4), cleomiscosin A (5), dihydro-4-hydroxy-5-hydroxymethyl-2(3H)-furanone(6), methyl chlorogenate(7), kaempferol(8), pinoresinol monomethyether-4??-O-??-D-glucopyranoside(9), martairesinol-4??-O-??-D-glucopyranoside(10), cycloolivil-6-O-??-D-glucopyranoside(11), stigmasterol-3-O-??-D-glucopyranoside(12), nicotinamide(13), trans-caffeic acid-4-O-??-D-glucopyranoside(14), esculin(15), 5-hydroxyl-7-methoxycoumarin-8-O-??-D-glucopyranoside(16), 6-oxymethyluteolin-7-O-??-D-glucopyranoside(17), luteolin-7-O-??-D-glucopyranoside(18), quercetin-3-O-(4??-methoxy)-??-L-rhamnopyranoside(19), 2??-deoxy uridine(20), and apigenin-6, 8-di-C-??-D-glycoside(21), respectively. CONCLUSION All the compounds, except 8 and 12, are isolated from U. fissa for the first time. Meanwhile, compounds 5, 6, 9, 10, 11, 14, 16, 17, and 19 are all found in Urticaeae plants for the first time.     

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??OBJECTIVE To study the chemical constituents of Patrinia villosa (Thunb.) Juss. METHODS The compounds were isolated by a combination of various chromatographic techniques including column chromatography over macroporous resin, Sephadex LH-20, and reversed-phase HPLC. Their structures were elucidated by physiochemical property and spectral analysis. RESULTS Eleven compounds were isolated and identified as(7R,8S)-3,3??,5-trimethoxy-4??,7-epoxy-8,5??-neolignan-4,9,9??-triol-9-O-??-D-glucopyranoside(1), massonianoside D(2),(7R,8S)-dihydroxydehydrodiconiferyl alcohol-4-O-??-D-glucopyranoside(3),(7S,8R)-dihydroxydehydrodiconiferyl alcohol-4-O-??-D-glucopyranoside(4), 7R,8S-glochidioboside(5), lariciresinol-4-O-??-D-glucopyranoside(6), lariciresinol-9-O-??-D-glucopyranoside(7), lariciresinol-4??-O-??-D-glucopyranoside(8), tortoside B(9), tanegool(10), and tanegool-7??-methyl ether(11). CONCLUSION All compounds are isolated from Patrinia genus for the first time.     

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??OBJECTIVE To study the chemical constituents from the aerial parts of Paris polyphylla var. chinensis. METHODS The compounds were isolated and purified from the 75% ethanol extract by chromatography on HPD100 macroporous resin, silica gel, and Sephadex LH-20 as well as semi-preparative HPLC. Their structures were elucidated on the basis of spectral data. RESULTS Eleven compounds were isolated and identified as corchionoside C (1), ??-ecdysterone (2), coronatasterone (3), kaempferol-3-O-??-D-galactopyranoside (4), astragalin (5), isorhamnetin-3-O-??-D-glucopyranoside (6), kaempferol-3-O-??-D-glucopyranosyl-(l??2)-??-D-galactopyranoside(7), isorhamnetin-3-O-??-D-glucopyranosyl-(l??2)-??-D-galactopyranoside (8), kaempferol-3-O-??-D-glucopyranosyl-(l??2)-??-D-glucopyranoside (9), isorhamnetin-3-O-??-D-galactopyranosyl-(l??6)-??-D-glucopyranoside (10), and isorhamnetin-3-O-??-D-gentiobioside (11). CONCLUSION Compounds 1 and 3-11 are isolated from this plant for the first time and compounds 1, 3-5 and 8-10 are isolated from Paris plants for the first time.     

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??OBJECTIVE To investigate the chemical constituents from the stems of Lythrum salicaria L..METHODS The constituents were isolated and purified by silica gel, Sephadex LH-20 column chromatography, and TLC. The structures were identified on the basis of spectral data and physiochemical characteristics. RESULTS Twenty compounds were isolated from 70% ethanol extracts and identified as betulinic acid(1), 2??,3??,24-trihydroxy-12(13)-en-urs-28-oic acid(2), 6-O-(E)- sinapoylpoligalitol(3), feruloyl-6??-O-??-D-glucopyranoside(4), 7-oxo-??-sitosterol(5), en-tisolariciresinol(6), muramine(7), aesculetin(8), apigenin(9),(2E,6S)-2,6-dimethyl-6-O-??-D-xylpyranosyloxy-2,7-menthiafolic acid(10), quercetin3-O-(6??-caffeoyl)-??-D-galactopyranoside(11), cycloart-23-ene-3??,25-diol(12), (1??S,6??R)-8??-hydroxyabscisic acid-??-D-glucoside(13), 3??,5-dihydroxy-3,6,4??-trimethoxyl-7-O-??-D-glucopyranoside flavonoid(14), aurantiamide acetate(15), 5,6,3??,4??-tetrahydroxy-3,7-dimethoxy-flavone(16), ursolic acid(17), oleanolic acid(18), 4-O-11-methyl-oleoside-p-hydroxyphenyl-(6??-11-methyloleoside)-??-D-glucopyranoside(19), and 6-O-galloylarbutin(20). CONCLUSION Except for compounds 8 and 9, all the compounds were isolated from this plant material for the first time.
     

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??OBJECTIVE To study the flavonoid glycosides of Urena lobata. METHODS Compounds were isolated and purified using various column chromatographies such as D101 macroporous adsorption resin, silica gel, Sephadex LH-20, and prep HPLC. Their structures were identified on the basis of their physicochemical properties and various spectroscopic experiments, including HRESIMS, ¹H-NMR, ¹³C-NMR, HSQC, and HMBC. RESULTS Ten flavonoid glycosides were obtained from the n-BuOH extract of U. lobata including quercetin-3-O-??-D-glucopyranosyl-(1??2)-??-D-galactopyranoside(1), kaempferol-3-O-??-D-glucopyranosyl-(1??2)-??-D-glucopyranosyl-7-O-??-L-rhamnopyranoside(2), quercetin-3-O-??-D-apiofuranosyl-(1??2)-??-D-glucopyranosyl-7-O-??-L-rhamnopyranoside(3), kaempferol-4'-O-??-D-apiofuranosyl-3-O-??-D-glucopyranosyl-7-O-??-L-rhamnopyranoside(4), kaempferol-3-O-??-D-apiofuranosyl-(1??2)-??-D-glucopyranosyl-7-O-??-L-rhamnopyranoside(5), quercetin-3-O-??-D-glucopyranosyl-7-O-??-L-rhamnopyranoside(6), quercetin-3-O-??-D-glucopyranosyl-(1??2)-??-D-glucopyranoside(7), kaempferol-3-O-??-L-rhamnopyranosyl-(1??6)-??-D-glucopyranosyl-(1??2)-??-D-glucopyranoside(8), kaempferol-3-O-??-D-glucopyranosyl-(1??2)-[??-L-rhamnopyranosyl-(1??6)]-??-D-glucopyranoside(9) and kaempferol-3-O-??-D-glucopyranosyl-(1??2)-??-D-glucopyranoside(10). CONCLUSION Compounds 1-3 and 6-10 are firstly obtained from U. lobata.     

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??OBJECTIVE To investigate the chemical constituents from the stems of Viola japonica var. stenopetala Franch. ex H.METHODS The constituents were isolated and purified by silica gel, Sephadex LH-20 column chromatography, and preparative TLC. The structures were identified on the basis of spectral data and physiochemical characteristics. RESULTS Fifteen compounds were isolated from 70% ethanol extract of Viola japonica var. stenopetala Franch. ex H. and identified as ??-sitosterol (1), daucosterol(2), chlorogenic acid (3), 7-hydroxycoumarin (4), stigmastero-3-O-??-D-glucopyranoside (5), dehydrololiolide (6), kaempferol-7-O-??-D-glucopyranoside (7), characterizedas(+)-pinoresinol-O-??-D-glucopyranoside (8), 5,7-dihydroxy-3,6-dimethoxyflavone (9), apigenin-7-O-??-D-glucoside (10), chryseriol (11), ??-amyrin(12), robinin(13), kaempferol-3,7-di-O-??-L-rahmnoside(14), and solagenin-6-O-??-D-quinovopyranoside(15). CONCLUSION Compounds 8 and 15 are isolated from the plants in Gnaphalium L. for the first time. Compounds 5, 6, 8, 11, 14, and 15 are isolated from this plant material for the first time.