生脉注射液中高异黄酮类成分研究

 目的 探讨生脉注射液中高异黄酮类成分物质基础。方法 以麦冬萃取物化学成分研究为基础,采用液相色谱-质谱联用技术对8家生产企业的生脉注射液样品进行化学成分指认。结果 麦冬萃取物中8个主要化学成分中8家生产企业多数共有成分为麦冬黄酮B,麦冬黄烷酮B,麦冬黄烷酮A,甲基麦冬黄烷酮A,甲基麦冬黄烷酮B。结论 建立了生脉注射液中高异黄酮类成分的检查方法,为研究注射剂高异黄酮类成分及统一制法提供实验依据。     

中药麦冬脂溶性化学成分的研究

 目的　研究中药麦冬(Ophiopogonjaponicus)块根的脂溶性成分,为全面反映麦冬的化学成分提供依据。方法　利用硅胶和SephadexLH-20等柱色谱进行分离,用化合物的波谱数据鉴定其结构。结果　从麦冬块根的醋酸乙酯部位分得16个脂溶性成分,其中包括7个高异黄酮类成分即甲基麦冬黄烷酮A(Ⅰ),甲基麦冬黄烷酮B(Ⅱ),甲基麦冬黄酮A(Ⅲ) ,甲基麦冬黄酮B(Ⅳ),2′-羟基甲基麦冬黄酮A(Ⅴ),6-醛基异麦冬黄烷酮A(Ⅵ),5,7-dihydroxy-8-methoxy-6-methyl-3-(2′-hydroxy-4′-methoxybenzyl)chroman-4-one(Ⅶ) ;2个蒽醌类成分即大黄酚(Ⅷ)和大黄素(Ⅸ);3个酚酸类成分即香草酸(Ⅹ),对羟基苯甲醛(Ⅺ)和对羟基反式丙烯酸(Ⅶ);2个萜类成分即龙脑葡萄糖苷(Ⅷ)和齐墩果酸(XIV);2个有机酸类成分即壬二酸(XV)和正二十三烷酸(XVI)。结论　化合物IV为首次从该植物中分得,化合物Ⅷ～Ⅻ,XIV～XVI为首次从沿阶草属植物中分得。蒽醌类,三萜类以及酚酸类为首次从沿阶草属植物中分得的化合物类型。     

麦冬

该品为百合科植物麦冬（沿阶草）Ophiopogon japonicus（T.f）Ker-Gawl.的干燥块根。夏季采挖,洗净,反复暴晒、堆置,至七八成干,除去须根,干燥。性味与归经：甘、微苦,微寒。归心、肺、胃经。功能与主治：养阴生津,润肺清心。用于肺燥干咳,阴虚痨嗽,喉痹咽痛,津伤口渴,内热消渴,心烦失眠,肠燥便秘。化学成分：含多种甾体皂甙：麦冬皂甙A、B、C、D,甙元均为假叶树皂甙元,另含麦冬皂甙B＇、C＇、D＇,甙元均为薯蓣皂甙元;尚含多种黄酮类化合物：如麦冬甲基黄烷酮A、B,麦冬黄烷酮A、麦冬黄酮A、B,     

毛莲蒿的化学成分

 目的：对毛莲蒿的化学成分进行研究。方法：采用硅胶和聚酰胺柱层析进行分离，运用红外光谱、紫外光谱、质谱、核磁共振谱与标准品对照的方法鉴定15个化合物。结果：分离鉴定了3个倍半萜类：taurin（1）、1，11-bis-epi-artesin（2）、yomogin（3）；3个黄酮类：5，7，3′，4′-四羟基-6，8-二甲氧基黄酮（4）、5，7，3′，4′-四羟基-6-甲氧基黄酮（5）、5，6，3′，4′-四羟基-7-甲氧基黄酮（6）；3个三萜类：蒲公英赛醇乙酸酯（7）、木栓酮（8）、α-香树脂醇（9）；2个甾体类：β-谷甾醇（10）、胡萝卜苷（11），2个香豆素类：莨菪亭（12）、7-羟基-6，8-二甲氧基香豆素（13）；2个有机酸类：异阿魏酸（14）、咖啡酸（15）。结论：所有化合物均为首次从该植物中分得。     

灰苞蒿中生物碱和黄酮成分研究

从灰苞蒿Artemisiaraxbughiana地上部分的混合溶剂（石油醚-乙醚-甲醇）提取物和乙醇提取物中首次分离并鉴定了1个生物碱和4个黄酮成分：N-苯基-2-萘胺，5，4′－二羟基-3，6，7-三甲氧基黄酮（喷杜素），5，7-二羟基-3，3′，4′-三甲氧基黄酮（quercetin3，3′，4′-三甲基酸），5，7-二羟基-6，3′，4′-三甲氧基黄酮（异泽兰黄素），5，7，4′-三羟基-6；3′-二甲氧基黄酮（jaceosidin）。     

藏药镰荚棘豆中黄酮类化学成分的研究

目的:研究藏药镰荚棘豆Oxytropis falcata Bunge中的黄酮类成分。方法:采用硅胶柱色谱、Sephadex LH-20凝胶柱色谱及制备型高效液相色谱等进行分离纯化,通过超导核磁共振波谱和X-ray单晶衍射等现代谱学技术分析鉴定了化合物的结构。结果:从镰荚棘豆乙醇提取物的乙酸乙酯萃取部位中分离得到16个黄酮类化合物,分别鉴定为:5-羟基-7-甲氧基二氢黄酮(1)、7-羟基二氢黄酮(2)、5,7-二羟基二氢黄酮(3)、7-羟基-4′-甲氧基异黄酮(4)、7-羟基-3′,4′-亚甲二氧基异黄酮(5)、7,5′-二羟基-3′-甲氧基异黄酮(6)、5,7,2′-三羟基-4′-甲氧基异黄酮(7)、苜蓿内酯(8)、5,2′,4′-三羟基-7-甲氧基异黄酮(9)、7,3′-二羟基-4′-甲氧基异黄酮(10)、5,7,2′,4′-四羟基异黄酮(11)、7,5′-二羟基-2′-甲氧基异黄酮(12)、2′-甲氧基-4′-羟基查尔酮(13)、2′,4′-二羟基查尔酮(14)、4,4′-二羟基-6′-甲氧基查尔酮(15)、4,4′-二羟基-2′-甲氧基查尔酮(16)。结论:其中,化合物9、11～13、15、16为首次从该植物中分离得到。     

麦冬化学成分研究

目的：对麦冬Ophiopogon japonicus（L f.）Ker—Gawl．块根进行化学成分研究。方法：用硅胶、Sepha—dex LH020和HPLC等柱色谱分离化合物，根据理化性质和波谱数据鉴定其结构。结果：从麦冬块根的乙醇提取物中分离得到4个化合物，分别鉴定为甲基麦冬二氢黄酮A（1）、甲基麦冬二氢黄酮B（2）、5-羟甲基糠醛（3）、[5-（dimethoxymethyl）-2-furyl]methanol（4）。结论：化合物4为首次从该植物中分离得到的天然产物。     

HPLC同时测定麦冬药材中3种黄酮类成分的含量

 目的 测定麦冬药材中甲基麦冬黄烷酮A、甲基麦冬黄烷酮B和6-醛基异麦冬黄烷酮A的含量,为麦冬药材的质量控制提供科学依据。方法 采用Waters Symmetry C₁₈柱(4.6 mm×250 mm, 5 μm),乙腈-0.05%磷酸梯度洗脱,流速为1.0 mL·min-1,检测波长296 nm,柱温30 ℃。结果 甲基麦冬黄烷酮A、甲基麦冬黄烷酮B和6-醛基异麦冬黄烷酮A分别在9.68~96.8、4.96~49.6、4.18~41.8 μg·mL-1内具有良好的线性关系,平均回收率(n=6)分别为100.1% (RSD 1.03%),99.5%（RSD 1.35%）和100.2%（RSD 1.16%）。结论 该方法快速、准确,可用于麦冬药材中甲基麦冬黄烷酮A、甲基麦冬黄烷酮B和6-醛基异麦冬黄烷酮A的含量测定。     

Flavanes and homoisoflavanes in Chinese dragon's blood

目的 研究龙血竭二氯甲烷提取部位中黄烷和高异黄烷类成分.方法 利用硅胶、聚酰胺柱色谱及反复重结晶等方法进行分离纯化,根据理化性质和波谱分析对分离得到的化合物进行结构鉴定.结果 分离得到6个化合物,分别鉴定为7-羟基-4′-甲氧基黄烷(1)、4′-羟基-7-甲氧基-8-甲基黄烷(2)、5,4′二羟基-7-甲氧基-6-甲基黄烷(3)、7,4′-二羟基高异黄烷(4)、6,4′-二羟基-7-甲氧基高异黄烷(5)和10-羟基-11-甲氧基龙血酮(6).结论 化合物6为首次从剑叶龙血树中分离得到,化合物2为首次从龙血竭中分离得到.     

龙血竭黄酮类成分研究

目的：研究龙血竭Dracaena cochinchinensis(Lour.)S．C．Chen的化学成分。方法：采用聚酰胺、硅胶柱色谱、高效液相色谱分离化学成分，UV、IR、NMR、MS等方法进行结构鉴定。结果：从乙酸乙酯提取物中分离鉴定了7个黄酮类成分，分别为7—羟基黄酮(I)，7—羟基—3′—甲氧基-4′—丁氧基黄酮(7—hydroxy—3′—methoxy-4′—butoxyflavone，Ⅱ)，7，4′—二羟基黄酮(Ⅲ)，5，7，4′—三羟基黄酮(Ⅳ)，5，7，4′—三羟基—8—甲基黄酮(V)，5，7，4′—三羟基—6甲基黄酮(Ⅳ)，7，4′—二羟基—5—甲氧基—8—甲基黄酮(Ⅵ)。结论：除化合物Ⅲ外，其它化合物均为首次从该植物中分离得到；化合物Ⅱ、Ⅵ为新化合物。     

HPLC同时测定麦冬中3种高异黄酮含量

采用反相高效液相色谱法同时测定麦冬中6-甲酰基沿阶草酮甲、甲基沿阶草酮甲和沿阶草酮甲的含量,选用乙腈-0.5％磷酸溶液(58:42)作为流动相,检测波长为296nm(0～14min),275nm(14～22min).6-甲酰基沿阶草酮甲、甲基沿阶草酮甲和沿阶草酮甲检测的线性范围分别为0.165～0.990(r=0.9999),0.153～0.918(r=0.9999),0.270～1.620μg(r=0.9999),平均加样同收率分别为99.76％(RSD0.95％),99.86％(RSD0.82％),99.41％(RSD1.1％).研究所建立的反相高效液相色谱法法简便快速、准确度高,可用于麦冬药材的质量控制.     

Five new homoisoflavonoids from the tuber of Ophiopogon japonicus

Five new homoisoflavonoids, ophiopogonanone C (1), ophiopogonanone D (2), ophiopogonone C (3), ophiopogonanone E (4) and ophiopogonanone F (5), and six known compounds were isolated from an ethanol extract of the tubers of Ophiopogon japonicus (Thunb) Ker-Gawl. Spectroscopic analyses were used to elucidate the structures of these compounds.     

Purine alkaloids from the South China Sea gorgonian Subergorgia suberosa

Four new purine alkaloids, namely, 6-(1'-purine-6',8'-dionyl)suberosanone ( 1), 3,9-(2-imino-1-methyl-4-imidazolidinone-5-yl)isopropenylpurine-6,8-dione ( 2), 1-(3'-carbonylbutyl)purine-6,8-dione ( 3), and 9-(3'-carbonylbutyl)purine-6,8-dione ( 4), together with three known compounds, guanosine ( 5), thymidine ( 6), and adenosine ( 7), were isolated from the EtOH/CH 2Cl 2 extracts of the South China Sea gorgonian Subergorgia suberosa. The structures of 1- 4 were determined on the basis of extensive spectroscopic analysis, including 1D and 2D NMR data. Compounds 1- 4 all showed weak cytotoxicity toward human cancer cell lines MDA-MB-231 and A435.     

Prenylated flavanones with anti-tyrosinase activity from Dalea boliviana

Three new prenylated flavanones, (2S)-5,7,2'-trihydroxy-5'-(1',1'-dimethylallyl)-8-prenylflavanone (1), (2S)-5,7,2'-trihydroxy-8,3'-diprenylflavanone (2), and (2S)-5,2'-dihydroxy-6',6'-dimethylchromeno-(7,8:2',3')-3'-prenylflavanone (3), and a known chromeno (dimethylpyrano) flavanone, obovatin (4), were isolated from the n-hexane extract of Dalea boliviana roots. The compounds were evaluated in vitro in relation to their inhibitory effect on the tyrosinase activity by using a spectrophotometric method.     

New salicylic acid and isoflavone derivatives from Flemingia paniculata

A new salicylic acid derivative, 2-carboxy-3-(2-hydroxypropanyl)phenol (1), and four new isoflavones, 5,7,4'-trihydroxy-8-(1,1-dimethylprop-2-enyl)isoflavone (2), 5,7,2',4'-tetrahydroxy-8-(1,1-dimethylprop-2-enyl)isoflavone (3), 5,2',4'-trihydroxy-4' ',4' ',5' '(xi)-trimethyl-4' ',5' '-dihydrofurano-(7,6,2' ',3' ')isoflavone (4), and 5,2',4'-trihydroxy-7-(3-methylbut-2-enyloxy)isoflavone (5), were isolated from the stem bark of Flemingia paniculata. The structures of these compounds were established unambiguously by spectroscopic data interpretation. The biogenetic pathways to 1 and 2-4 have been postulated.     

Antitubercular chromones and flavonoids from Pisonia aculeata

Three new chromones, pisonins A (1), B (2), and D (4), two new flavonoids, pisonivanone [(2S)-5,7,2'-trihydroxy-8-methylflavanone] (7) and pisonivanol [(2R,3R)-3,7-dihydroxy-5,6-dimethoxyflavanone] (8), one new isoflavonoid, pisonianone (5,7,2'-trihydroxy-6-methoxy-8-methylisoflavone) (9), and five compounds first isolated from nature, namely, pisonins C (3), E (5), and F (6), pisoniamide (10), and pisonolic acid (11), together with 18 known compounds have been isolated from the methanol extract of the combined stem and root of Pisonia aculeata. Among these isolates, 2, 7, 14, 16, and 19 exhibited antitubercular activities (MICs≤50.0 μg/mL) against Mycobacterium tuberculosis H37Rv in vitro.     

浅裂鳞毛蕨地上部分二氢黄酮类化学成分研究

 目的对鳞毛蕨属植物浅裂鳞毛蕨(Dryopteris sublaeta Ching et Hsu.)地上部分的化学成分进行研究。方法利用硅胶柱色谱进行分离纯化,根据化合物的理化性质和光谱数据鉴定结构。结果浅裂鳞毛蕨地上部分用体积分数为70%丙酮提取液乙醚萃取部位分离得到了5个化合物,分别鉴定为:(2S)5,7-二羟基-6,8-二甲基二氢黄酮(去甲氧基荚果蕨素)(Ⅰ),(2S)5,7-二羟基-6,8-二甲基-4′-甲氧基二氢黄酮(荚果蕨素)(Ⅱ),(2S)5,7,2′-三羟基-6,8-二甲基-二氢黄酮(Ⅲ),(2S)5,7,4′-三羟基-3′-甲氧基-6,8-二甲基二氢黄酮(Ⅳ),(2S)5-羟基-4′-甲氧基-6,8-二甲基二氢黄酮-7-O-β-D-葡萄糖苷(Ⅴ)。结论上述5个二氢黄酮类化合物均为首次从浅裂鳞毛蕨地上部分中分离得到。     

Structures and histamine release inhibitory effects of prenylated orcinol derivatives from Rhododendron dauricum

Four new prenylated orcinol derivatives, daurichromenes A-D (1-4), along with three known compounds, confluentin (5), grifolin (6), and orcinol (7), have been isolated from the Chinese medicinal plant Rhododendron dauricum. Their structures were established as 2R-(7'-hydroxy-4',8'-dimethyl-3'E,8'-nonadienyl)-5-hydroxy-2,7-dimethyl-2H-chromene (1), 2R-(3'-hydroxy-8'-methyl-4'-methyliden-7'-nonaenyl)-5-hydroxy-2,7-dimethyl-2H-chromene (2), 2R-(8'-hydroxy-4',8'-dimethyl-3'E,6'Z-nonadienyl)-5-hydroxy-2,7-dimethyl-2H-chromene (3), and 2R-(9'-hydroxy-4',8'-dimethyl-3'E,7'E-nonadienyl)-5-hydroxy-2,7-dimethyl-2H-chromene (4) by analysis of spectral data. The absolute configuration of the asymmetric carbons at the chromene ring in 1-5 was determined as R from their circular dichroism spectra. Compounds 1-6 significantly inhibited compound 48/80-induced histamine release from rat peritoneal mast cells.     

钩枝藤茎枝生物碱类成分的研究

 目的对钩枝藤茎、枝的化学成分进行研究。方法采用氧化铝柱色谱,硅胶柱色谱,Sephadex LH-20凝胶柱色谱进行分离,通过理化和波谱分析鉴定结构。结果分离并鉴定了7生物碱个化合物。分别为ancistrobertsonine B(1),an- cistrotectorine(2),(1S,3S)-5-(4,5-二甲氧基-2-甲基萘-1-基)-6,8-二甲氧基-1,3-二甲基-1,2,3,4-四氢异喹啉(3),(1S,3R)-5-(4,5-二甲氧基-2-甲基萘-1-基)-6,8-二甲氧基-1,3-二甲基-1,2,3,4-四氢异喹啉(4),ancistro- cline(5),ancistrocladinine(6),hamatinine(7)。结论化合物1,3,4,6,7均为首次从该植物中分离得到。     

Terpenylated coumarins as SIRT1 activators isolated from Ailanthus altissima

Four new terpenylated coumarins (1-4) were isolated from the stem bark of Ailanthus altissima by bioactivity-guided fractionation using an in vitro SIRT1 deacetylation assay. Their structures were identified as (2'R,3'R)-7-(2',3'-dihydroxy-3',7'-dimethylocta-6'-enyloxy)-6,8-dimethoxycoumarin (1), 6,8-dimethoxy-7-(3',7'-dimethylocta-2',6'-dienyloxy)coumarin (2), (2'R,3'R,6'R)-7-(2',3'-dihydroxy-6',7'-epoxy-3',7'-dimethyloctaoxy)-6,8-dimethoxycoumarin (3), and (2'R,3'R,4'S,5'S)-6,8-dimethoxy-7-(3',7'-dimethyl-4',5'-epoxy-2'-hydroxyocta-6'-enyloxy)coumarin (4). Compounds 1-4 strongly enhanced SIRT1 activity in an in vitro SIRT1-NAD/NADH assay and an in vivo SIRT1-p53 luciferase assay. These compounds also increased the NAD-to-NADH ratio in HEK293 cells. The present results suggest that terpenylated coumarins from A. altissima have a direct stimulatory effect on SIRT1 deacetylation activity and may serve as lead molecules for the treatment of some age-related disorders.