穆坪马兜铃化学成分的研究

自穆坪马兜铃(Aristolochia moupinensis Franch)根、茎中分得十三个化合物,其中化合物Ⅰ～Ⅻ经鉴定分別为马兜铃酸Ⅰ(aristolochic acid Ⅰ)(Ⅰ),尿囊素(allantoin)(Ⅱ),紫丁香酸(syringic acid)(Ⅲ),香豆酸(P-coumaric acid)(Ⅳ),马兜铃酸Ⅳ(aristolochic acid Ⅳ)(Ⅴ),β-谷甾醇(Ⅵ),木兰碱(magnoflorine)(Ⅶ),马兜铃酸Ⅳ甲醚aristolochic acid Ⅳ methyl ether(Ⅵ),棕榈酸(Ⅸ),马兜铃酸Ⅱ(aristolochic acid Ⅱ)(Ⅹ),N(Phydroxyphenethy1)P-coumaramide(Ⅺ),马兜铃酸Ⅳ甲醚甲酯(aristolochic acid Ⅳ methyl ether methyl ester)(Ⅻ),化合物ⅩⅢ为新化合物,经光谱分析和化学合成等方法证明其结构为N(P-hydroxyphenethyl)-ferulamide,命名为穆坪马兜铃酰胺(moupinamide)。 初步药理试验表明穆坪马兜铃酰胺体外有抑制血小板聚集和影响血小板内前列腺素合成的作用。     

穆坪马兜铃化学成分的研究

自穆坪马兜铃(Aristolochia moupinensis Franch)根、茎中分得十三个化合物,其中化合物Ⅰ～Ⅻ经鉴定分別为马兜铃酸Ⅰ(aristolochic acid Ⅰ)(Ⅰ),尿囊素(allantoin)(Ⅱ),紫丁香酸(syringic acid)(Ⅲ),香豆酸(P-coumaric acid)(Ⅳ),马兜铃酸Ⅳ(aristolochic acid Ⅳ)(Ⅴ),β-谷甾醇(Ⅵ),木兰碱(magnoflorine)(Ⅶ),马兜铃酸Ⅳ甲醚aristolochic acid Ⅳmethyl ether(Ⅵ),棕榈酸(Ⅸ),马兜铃酸Ⅱ(aristolochic acid Ⅱ)(Ⅹ),N(Phydroxyphenethy1)P-coumaramide(Ⅺ),马兜铃酸Ⅳ甲醚甲酯(aristolochic acid Ⅳmethyl ether methyl ester)(Ⅻ),化合物ⅩⅢ为新化合物,经光谱分析和化学合成等方法证明其结构为N(P-hydroxyphenethyl)-ferulamide,命名为穆坪马兜铃酰胺(moupinamide)。初步药理试验表明穆坪马兜铃酰胺体外有抑制血小板聚集和影响血小板内前列腺素合成的作用。     

木通马兜铃化学成分研究

从木通马兜铃(Aristolochia manshuriensis Kom)茎皮中分得一个新化合物(5),经光谱(IR,UV,HRMS,^{1HNMR,NOEDS)鉴定为3,4-二甲氧基-10-硝基菲-1-羧酸甲酯,命名为马兜铃酸BII甲酯。另11个已知化合物是马兜铃酸Ⅰ,Ⅱ,Ⅲa,Ⅳ,Ⅳa,对羟基桂皮酸,β-谷甾醇,豆甾烷-3,6-二酮,6-羟基-豆甾-4-烯-3-酮,胡萝卜甙,二十八酸甘油单酯;其中二十八酸甘油单酯为首次从该属植物中分得。}     

管花马兜铃化学成分的研究

从管花马兜铃(Aristolchia tubflora Dunn)中分得一个新化合物,经光谱(IR,UV,HRMS,HNMR,NOEDS)鉴定为9,1O-二羟基-8-甲氧基-3,4-亚甲二氧基菲-1-羧酸-内酯,命名为马兜铃菲内酯I;另七个马兜铃菲类化合物是马兜铃酸Ⅰ,Ⅱ,Ⅲa,Ⅶa,马兜铃内酰胺Ⅰ,Ⅱ及青木香酸。     

中药中马兜铃酸肾毒性研究进展

马兜铃酸(aristolochic acid,AA)是一种硝基菲类化合物,是马兜铃属植物如关木通、马兜铃中的主要成分。含有AA的中药或中成药,在临床上曾用于风湿病、毒蛇咬伤和癌症的辅助治疗等。我国也曾将以马兜铃酸I(AAI)为主的总酸称为"增噬力酸",并应用于临床。1993年Van-hei weghemJL等报道了比利时妇女因服用含有广防己的减     

板栗种仁酸水解物化学成分的分离与鉴定

目的更好地开发利用板栗(Castanea mollissimaBlum)种仁。方法对板栗种仁的体积分数为95%的乙醇提取物进行酸水解,水解物采用硅胶柱色谱?氧化铝柱色谱、凝胶柱色谱和重结晶等方法进行分离;根据理化性质和NMR谱数据并参考文献鉴定其结构。结果分离鉴定了10个化合物,分别为对羟基苯甲酸(p-hydroxybenzoic acid,1)、原儿茶酸(protocatechuic acid,2)、没食子酸(gallic acid,3)、5-羟甲基糠醛(5-hydroxymethylfurfural,4)、β-谷甾醇(β-sitosterol,5)、α-菠甾醇(α-spinasterol,6)、齐墩果酸(oleanane acid,7)、2α-羟基齐墩果酸(maslinic acid,8)、α-香树脂醇(α-amyrin,9)、单棕榈酸甘油酯(glycerolmonopalmitate,10)。结论化合物6、8为首次从栗属植物中分离得到;化合物9为首次从板栗中分离得到。     

北马兜铃的化学成分研究——Ⅱ、马兜铃酸E的化学结构

北马兜铃(Aristolochia contorta Bunge)系马兜铃科马兜铃属植物,根、果入药具有祛痰发汗之效。关于北马兜铃的化学成分未见较详细的研究报道。作者对北马兜铃根的乙醇提取物,经酸碱处理,通过柱层析,制备薄层分离得到六个结晶性成分,分别鉴定为尿囊素(allatoin),马兜铃酸A(aristolochic acid A),木兰碱(magnoflorine),β-谷甾醇(β-     

高效液相色谱法检测北细辛药材不同部位的马兜铃酸

目的检测北细辛药材不同部位的马兜铃酸含量。方法采用高效液相色谱（HPLC）法,色谱柱为C18柱（150mm×4.6mm,5μm）,磷酸二氢钠-乙腈（60：40）为流动相,检测波长为400nm。结果北细辛药材地上部分、地下部分及全草中均未检出马兜铃酸A。结论该法简便、快速、准确,可用于北细辛药材中马兜铃酸的检测。     

慢性马兜铃酸肾病的临床研究

中药是祖国医学传统药物，数千年来广泛应用干临床，一直被视为无任何不良反应，安全有效。近年来．关木通及广防己等中药引起肾损害已被确认，并日益受到重视。国内外学者经研究认为此种肾损害是由马兜铃酸（aristolochic acid．AA）所致，因此国内称为“马兜铃酸肾病（aristolochic acid nephmpathy，AAN）”，根据马兜铃酸肾病的临床表现及病理改变分为肾小管功能障碍型和慢性马兜铃酸肾病型2种。现将我科2001年4月-2004年5月，诊治的42例马兜铃酸肾病患者资料进行分析，以提高对此病的认识。     

HPLC法测定种子经处理后种植的辽细辛中马兜铃酸A的含量

目的比较不同种子处理方法对辽细辛中马兜铃酸A的含量的影响。方法采用不同方法对同一批辽细辛种子进行处理并种植,采收2年生不同月份的辽细辛植株进行马兜铃酸A的含量测定;采用Diamonsil(钻石)C18色谱柱(200 mm×4.6 mm,5μm),以0.05 mol.L-1磷酸二氢钠水溶液-乙腈(体积比为60∶40)为流动相,流速为1.0 mL.min-1,柱温为30℃,检测波长为390 nm,进样量为10μL,外标法计算含量。结果种植2年后的辽细辛药材各部位中均含有马兜铃酸A且地上部分含量明显高于地下部分,其含量逐渐减少,到8、9月份已趋于稳定。结论采用水超声处理辽细辛种子的方法可以除去细辛中的部分马兜铃酸,但不能完全除去,为细辛中的马兜铃酸的去除提供了参考依据。     

Two new phenolic acids from Drynariae rhizoma

To study the chemical constituents of Drynariae Rhizoma, nine phenolic acids were isolated from a 70% ethanol extract by using a combination of various chromatographic techniques including column chromatography over silica gel, ODS, Sephadex LH-20, and semi-preparative HPLC. By spectroscopic techniques including 1H NMR, 13C NMR, 2D NMR, and HR-ESI-MS, these compounds were identified as 4, 4'-dihydroxy-3, 3'-imino-di-benzoic acid (1), protocatechuic acid (2), gallic acid (3), p-hydroxybenzoic acid (4), (E)-caffeic acid (5), ethyl trans-3, 4-dihydroxycinnamate (6), caffeic acid 4-O-beta-D-glucopyranoside (7), p-coumaric acid 4-O-beta-D-glucopyranoside (8), and 23(S)-12-O-caffeoyl-12-hydroxyllauric acid glycerol ester (9), separately. Among them, 1 and 9 are new compounds, and 3, 4, and 6 were isolated from Drynaria species for the first time.     

NMR regulatory analysis: determination and characterization of Chinese-herb aristolochic acids

1H NMR methodology for the simultaneous determination and characterization of the nephrotoxic components of Aristolochia plants aristolochic acid I (AA-I) and aristolochic acid II (AA-II) was developed utilizing a 400 MHz spectrometer without the need of reference standards. The developed methodology is able to differentiate and assess chemical structures of these toxic injurious compounds. The quantity of each was calculated on the basis of the integrals for the signals of the H-7 and H-8 of the phenanthrene ring of AA-I and AA-II at delta7.38 and delta8.31, respectively, and the vinylic protons of the internal standard maleic acid at delta6.06. The accuracy of the method was established through the analysis of synthetic mixtures containing the internal standard maleic acid, with purified AA-I or combined AA-I and AA-II sodium salts. Excellent agreements were verified between the assay results and the quantities in the mixtures. The mean +/- SD recovery values for purified AA-I and combined AA-I and AA-II from two sets of 10 synthetic mixtures were 99.8 +/- 0.6% and 99.6 +/- 0.8%, respectively. The assay of 4 lots of commercial aristolochic acid by 1H NMR spectroscopy indicated AA-I and AA-II contents in the ranges 45.3-97.1% and 0-15.4%, respectively.     

显脉羊蹄甲中酚酸类成分研究

为了研究显脉羊蹄甲中抗糖尿病活性成分,采用硅胶、ODS、MCI以及Sephadex LH-20等柱色谱方法从显脉羊蹄甲95%乙醇提取物中分离得到11个酚酸类成分,其结构经多种波谱技术鉴定为6'-O-没食子酰基葡萄糖异丙苷(1)、6'-O-没食子酰基葡萄糖乙苷(2)、3,4,5-三甲氧基苯酚-1-O-β-D-(6'-O-没食子酰基)吡喃葡萄糖苷(3)、3,4,5-三甲氧基苯酚葡萄糖苷(4)、没食子酸(5)、没食子酸甲酯(6)、没食子酸乙酯(7)、原儿茶酸(8)、3,5-二甲氧基-4-羟基苯甲酸(9)、erigeside C(10)和丁香酸葡萄糖苷(11)。化合物1为新化合物,化合物2、10和11为首次从羊蹄甲属植物中分离得到,其余化合物为首次从该植物中分离得到。化合物6和8对蛋白酪氨酸磷酸酶1B(protein tyrosine phosphatase1B,PTP1B)显示较好的抑制活性,其IC50值分别为72.3和54.1μmol.L-1。     

New aristolochic acid, aristololactam and renal cytotoxic constituents from the stem and leaves of Aristolochia contorta

Two novel phenanthrene derivatives, aristololactam IVa (1) and 9-hydroxy aristolochic acid I (2) were isolated from the stem and leaves of Anstolochia contorta Bunge, together with 17 known compounds (3-19). The structures of these compounds were determined by spectroscopic analysis. The phenanthrenes obtained were tested for cytotoxicity against renal proximal tubular epithelial cell line (HK-2). Aristololactam IVa and 7-methoxy aristololactam IV were found to have strong cytotoxic activity against HK-2 cells with a potency similar to or even stronger than those of aristolochic acid I and aristololactam I.     

A new flavone from Hypericum wightianum

A new flavone, wightianin (1), along with five known compounds, n-triacontanol (2), betulinic acid (3), oleanolic acid (4), 3,4-O-isopropylidene-shikimic acid (5), and isoquercitrin (6), were isolated from the whole plants of Hypericum wightianum Wall ex Wight et Arn. Their structures were elucidated on the basis of spectral data, including 2D NMR techniques.     

Three new phenolic compounds from the lichen Thamnolia vermicularis and their antiproliferative effects in prostate cancer cells

Three new phenolic compounds, thamnoliadepsides A (1), B (2), and thamnolic acid A (3), and seven known compounds, everninic acid (4), baeomycesic acid (5), β-orcinol (6), β-resorcylic acid (7), ethyl orsellinate (8), squamatic acid (9), and vermicularin (10), were isolated from the lichen Thamnolia vermicularis (Sw.) Ach. ex Schaerer. Their structures were determined based on spectroscopic analysis, including 2D-NMR experiments and HR-MS techniques. Compound 1 inhibited growth of prostate cancer cells and bonded to G-quadruplex DNA based on NMR determination.     

瓜蒌的化学成分研究

为了研究瓜蒌(Trichosanthes kirilowii Maxim.)的化学成分,利用D101大孔树脂、硅胶、SephadexLH-20、ODS等柱色谱和制备液相等各种色谱手段对其95%乙醇提取物进行系统的分离和纯化,共得到9个化合物。其结构经1H NMR、13C NMR、1H-1H COSY、HSQC、HMBC、ESI-MS技术分别鉴定为1-羧丙基-5-乙氧甲基-1H-吡咯-2-醛-吡咯(5-ethoxymethyl-1-carboxyl propyl-1H-pyrrole-2-carbaldehyde,1)、5-羟甲基糠醛(5-hydroxymethyl-2-furfural,2)、金圣草黄素(chrysoeriol,3)、4’-羟基黄芩素(4’-hydroxyscutellarin,4)、香草酸(vanillic acid,5)、α-菠甾醇(α-spinasterol,6)、α-菠甾醇-β-D-葡萄糖苷(β-D-glucopyranosyl-α-spinasterol,7)、豆甾-7-烯-3β-醇(stigmast-7-en-3β-ol,8)和腺苷(adenosine,9)。其中化合物1为新化合物,化合物3、4、5为首次从该属植物中分离得到。     

Chemical constituents of the brown alga Dictyopteris divaricata

A novel sesquiterpene-substituted benzoic acid, named dictyvaric acid (1), together with nine known compounds (2-10), have been isolated from the brown alga Dictyopteris divaricata Okam. The structure of 1 was elucidated as 3-[(decahydro-2-hydroxy-2,5,5,8a-tetramethyl-1-naphthalenyl)-methyl]-4-hydroxybenzoic acid by spectroscopic methods, including IR, FABMS, HR-FABMS, 1D and 2D NMR techniques. All compounds were obtained from this species for the first time.     

斩龙剑中新苯丙素甙的结构鉴定

从玄参科植物斩龙剑(Veronivastrum sibirica (L.)Pennell.)的根部分得九种化学成分,分别为斩龙剑甙A(sibiriosideA,Ⅰ)斩龙剑甙B(sibiriosideB,Ⅱ),异阿魏酸(isoferulicacid,Ⅲ),6-(4-methoxyferulpol)mioporoside(Ⅳ),scrophularioside(Ⅴ),6-O-阿魏酰梓醇(6-O-trans-feruloylcatalpol,Ⅵ),阿魏酸(ferulicacid,Ⅶ),胡萝卜甾醇(daucosterol,Ⅷ)和β-谷甾醇(Ⅸ)。其中斩龙剑甙A和斩龙剑甙B为新苯丙素甙化合物,应用波谱分析和理化数据测定,确定了它们的结构。