海南灵芝化学成分研究

为探讨海南灵芝(Ganoderma hainanense Zhao,Xu et Zhang)的化学成分,采用柱层析技术从海南灵芝乙醇提取物中分离得到14个化合物。经波谱分析鉴定其结构分别为:巴西红厚壳素(1)、6-脱氧巴西红厚壳素(2)、7,8-二甲基咯嗪(3)、5,8-过氧麦角固醇(4)、3β,5α,9α-三羟基麦角甾-7,22-二烯-6-酮(5)、麦角甾-7,22-二烯-3β-醇(6)、麦角甾-7,22-二烯-3-酮(7)、7α-甲氧基-5α,6α-环氧麦角甾-8(14),22-二烯-3β-醇(8)、麦角甾-7,22-二烯-3β,5α-6β-三醇(9)、3-吲哚甲酸(10)、3,4-二羟基苯甲酸(11)、对羟基苯甲酸(12)、3,4-二羟基苯甲酸甲酯(13)和正二十六烷酸(14)。所有化合物均为首次从海南灵芝中分离得到。     

白叶香茶菜中的紫罗兰酮衍生物

从白叶香茶菜Isodon leucophyllus(Dunn)Kudo地上部分的丙酮提取物中,分离得到1个新的紫罗兰酮类化合物和6个黄酮类化合物,经IR,UV,MS,NMR波谱数据分析,其结构分别确定为：13—羧基布卢姆醇C(1),5,7,3′,4′—四甲氧基黄酮(2),线蓟素(3),5—羟基—6,7,3′,4′—四甲氧基黄酮(4),3′—羟基—5,7,8,4′—四甲氧基黄酮(5),异甜橙素(6)和异槲皮素(7)。其中,化合物2—7均为首次从该植物中得到。     

大叶山楝根的化学成分及细胞毒活性研究

该研究从大叶山楝根95%乙醇提取物的乙酸乙酯萃取物中分离得到10个化合物,经波谱解析分别鉴定为schleicheol 2(1),β-扶桑甾醇(2),fregenedadiol(3),异巴西红厚壳素(4),丁香酯素(5),表丁香酯素(6),graminone A(7),sylvatesmin(8),Z-6-十九烯酸甲酯(9),棕榈酸(10)。其中,化合物1-4、化合物7-9为首次从山楝属植物中分离得到。细胞毒活性测试结果表明,化合物1和化合物2对人胃癌细胞SGC-7901生长具有一定的抑制活性。     

紫红獐牙菜中的酮类成分及其细胞毒活性

采用色谱分离手段对紫红獐牙菜Swertia punicea的乙醇提取物中乙酸乙酯和石油醚萃取部分进行分离纯化,运用1H NMR、13C NMR、HSQC、HMBC和ESI-MS等波谱方法和文献数据对比鉴定化合物结构,从紫红獐牙菜全草中得到8个口山酮类化合物,分别鉴定为1-羟基-2,3,5,7-四甲氧基口山酮(1)、1,2,3,4,5-五甲氧基口山酮(2)、1-羟基-2,3,4,7-四甲氧基口山酮(3)、1-羟基-2,3,5-三甲氧基口山酮(4)、dulcisxanthone C(5)、1-羟基-2,3,7-三甲氧基口山酮(6)、1,5-二羟基-2,3-二甲氧基口山酮(7)、1-羟基-3,4,5-三甲氧基口山酮(8),所有化合物均为首次从该植物中分离得到,化合物1、4、5、7对Hep G-2显现了很好的细胞毒活性。     

槟榔果实的酚类化学成分与抗菌活性的初步研究

从槟榔(Areca catechu L.)果实乙醇提取物的乙酸乙酯萃取部分分离得到了5个酚类成分,经波谱分析,分别鉴定为:异鼠李素(1)、金圣草黄素(2)、木犀草素(3)、(±)-4',5-二羟基-3',5',7-三甲氧基黄烷酮((4a,4b)和巴西红厚壳素(5).以上化合物均为首次从该属植物中分离得到.用滤纸片琼脂扩散法表明化合物(5)对MRSA和金黄色葡萄球菌有明显抑制作用.     

红厚壳枝条的化学成分

从红厚壳(Calophyllum inophyllum Linn.)枝条乙醇提取物中分离得到11个化合物,通过光谱分析,鉴定其结构为:6-羟基-2,3-二甲氧基 酮 ( 1 ) ,1,3,7-三羟基 酮 ( 2 ) ,1,3,7-三羟基-8-甲氧基 酮( 3 ) ,7-羟基-1,3-二甲氧基 酮( 4 ) ,伪蒲公英甾醇( 5 ) ,1,3,6-三羟基-5,7-二甲氧基 酮( 6 ) ,2-羟基-1-甲氧基 酮 ( 7 ) ,2-羟基-1,8-二甲氧基 酮 ( 8 ) ,1,3,5-三羟基-2-甲氧基 酮 ( 9 ) ,4-羟基 酮 ( 10 ) ,1,3,5-三羟基 酮 ( 11 ) 。化合物 2 ~ 5 为首次从红厚壳属植物中得到,化合物 6 ~ 8 为首次从该植物中得到,化合物 1 为一新的天然产物。细胞毒活性测试结果表明,化合物 9 对人胃癌细胞(SGC-7901)的增殖显示出生长抑制活性, 其IC₅₀值为1.8×10^-5 mol/L。     

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.     

瑞香狼毒化学成分研究

从瑞香狼毒95%乙醇提取物中分离得到了17个化合物,根据理化性质和波谱数据鉴定为4’-甲氧基-7-羟基黄酮(1),山奈酚(2),5,4’-二羟基-7-甲氧基二氢黄酮(3),4’,5,7-三羟基黄烷酮(4),3,5,7-三羟基黄烷酮(5),山奈酚-7-O-β-D-葡萄糖苷(6),α-香树酯醇(7),(24R)-5α-豆甾-7,22(E)-二烯-3α-醇(8),狼毒色原酮(9),伞形花内酯(10),东莨菪素(11),异东莨菪素(12),狼毒素(13),瑞香内酯(14),异茴芹香豆素(15),β-谷甾醇(16),瑞香素乙(17)和β-胡萝卜甙(18)。其中化合物1-8为首次从该植物中分离得到。     

草鞋木的化学成分研究

采用硅胶、Sephades LH-20、RP-18等色谱技术,对草鞋木(Macaranga henryi)枝条中的化学成分进行了研究,共分离得到8个化合物,通过NMR、MS等波谱学技术将其结构分别鉴定为:12-O-tetradecanoylphorbol-13-acetate(1),trigowiin A(2),daturadiol(3),山楂酸甲酯(4),3β-羟基豆甾-5-烯-7-酮(5),3β-羟基豆甾-5,22-二烯-7-酮(6),豆甾-3,5-二烯-7-酮(7),丁香脂素(8)。化合物5为首次从该种植物中分离得到,其余化合物均为首次从该属植物中分离得到。     

显脉獐牙菜化学成分研究Ⅱ

对显脉獐牙菜(Swertia nervosa)的化学成分研究。采用系统溶剂提取,常规硅胶柱色谱和薄层色谱进行分离纯化,根据化合物的物理、化学性质,UV、IR、MS、1H NMR、13C NMR等波谱鉴定其结构。从显脉獐牙菜中分离得到10个化合物,分别鉴定为1,5,8-三羟基-3-甲氧基酮(1)、1,3,8-三羟基-5-甲氧基酮(2)、5,7,3',4'-四羟基黄酮(3)、3,5,7,3',4'-四羟基黄酮(4)、2-C-β-D-吡喃葡萄糖-1,3,6,7-四羟基酮(5)、獐牙菜苦苷(6)、当药苦酯苷(7)、羟基当药苦酯苷(8)、齐墩果酸(9)、胡萝卜苷(10),化合物3~5、7、8和10为首次从显脉獐牙菜中分离得到。     

Cytotoxic prenylated phenolic compounds from the twig bark of Garcinia xanthochymus

Three new hydroxylated xanthones with prenyl or geranyl substituents, compounds 1-3, were isolated from the twig bark of Garcinia xanthochymus, along with the four known compounds 1,4,5,6-tetrahydroxy-7,8-diprenylxanthone (4), 1,3,5,6-tetrahydroxy-4,7,8-triprenylxanthone (5), garciniaxanthone E (6), and 6-prenylapigenin (7). Their structures were elucidated by extensive spectroscopic analysis, including 1D- and 2D-NMR as well as HR-MS experiments. All compounds showed moderate cytotoxicities against breast cancer (MDA-MB-435S) and lung adenocarcinoma (A549) cell lines, but lacked antifungal activity against Candida albicans.     

Polyanxanthone A, B and C, three xanthones from the wood trunk of Garcinia polyantha Oliv

Three xanthones, polyanxanthone A (1), B (2) and C (3) have been isolated from the methanol extract of the wood trunk of Garcinia polyantha, along with five known xanthones: 1,3,5-trihydroxyxanthone (4); 1,5-dihydroxyxanthone (5); 1,3,6,7-tetrahydroxyxanthone (6); 1,6-dihydroxy-5-methoxyxanthone (7) and 1,3,5,6-tetrahydroxyxanthone (8). Their structures were determined by means of 1D- and 2D-NMR techniques. Some of the above compounds were screened for their anticholinesterase activity on acetylcholinesterase (AChE) and butyrylcholinesterase (BChE) enzymes.     

Water-Soluble Constituents of Cudrania tricuspidata （Carr.） Bur.

In order to find new structural and biologically active compounds, the constituents of the bark of Cudrania tricuspidata （Carr.） Bur. were investigated and a new 6-p-hydroxybenzyltaxifolin glucoside, named tricusposide （compound 1）, together with 16 known compounds, was isolated by solvent partition, macroporous adsorption resin AB-8, silica gel, Sephadex LH-20 chromatography. Using spectroscopic methods, the structures of the compounds were elucidated as 6-p-hydroxybenzyl taxifolin-7-O-β-D-glucoside （compound 1）, dihydroquerctin-7-O-β-D-glucoside （compound 2）, dihydrokaempferol-3-O-β-D-glucoside （compound 3）, dihydroquercetin （compound 4）, peonoside （compound 5）, sphaerobioside （compound 6）, quercimeritrin （compound 7）, genistein （compound 8）, aromadendrin （compound 9）, kaempferol （compound 10）, genistin （compound 11）, 3,4-dihydroxystyryl alcohol （compound 12）, sucrose （compound 13）, 1,3,5,6-tetrahydroxyxanthone （compound 14）, gericudranin E （compound 15）, gericudranin C （compound 16）, and orobol （compound 17）. Compounds 2-6, 8, 9, 12-14, and 17 were isolated from this genus for the first time.     

Xanthones and benzophenones from Garcinia griffithii and Garcinia mangostana

A new polyisoprenylated benzophenone, guttiferone I, together with the known compounds cambogin, 1,7-dihydroxyxanthone, 1,3,6,7-tetrahydroxyxanthone and 1,3,5,6-tetrahydroxyxanthone were isolated from the stem bark of Garcinia griffithii. The acetone extract of the heartwood of Garcinia mangostana contained one new diprenylated xanthone (mangoxanthone) and a new benzophenone (3',6-dihydroxy-2,4,4'-trimethoxybenzophenone) as well as the known xanthones dulxanthone D, 1,3,7-trihydroxy-2-methoxyxanthone, 1,3,5-trihydroxy-13,13-dimethyl-2H-pyran[7,6-b]xanthen-9-one. Their structures were established on the basis of spectroscopic studies and chemical correlation.     

红背山麻杆化学成分的研究

采用柱色谱技术从红背山麻杆叶子的60％乙醇提取物中分离得到4个黄酮苷和2个其他类化合物.根据理化性质及波谱方法分别鉴定为:芹菜素-6-C-D-葡萄糖苷(1)、芹菜素-7-O-芸香糖苷(2)、芹菜素-7-O-β-(2″-O-α-鼠李糖基)葡萄糖醛酸苷(3)、木犀草素-7-O-α-L-鼠李糖(1→6)-β-D-葡萄糖苷(4)、没食子酸乙酯(5)、β-胡萝卜苷(6).以上化合物均为首次从该植物中分离得到,其中化合物1～4为首次从山麻杆属中分离得到的黄酮苷.     

醉鱼草果实水部位化学成分及神经保护活性研究

为研究醉鱼草果实水部位化学成分及其神经保护作用,利用多种色谱分离技术从醉鱼草果实水部位中分离得到10个化合物。结合现代光谱技术对分离得到的化合物进行结构鉴定,分别为密蒙花苷C(1)、异毛蕊花糖苷(2)、毛蕊花糖苷(3)、4′-hydroxyphenyl ethyl vanillate(4)、6-O-香草酰筋骨草苷(5)、syringaresinol-4′-O-β-D-glucopyranoside(6)、刺五加苷B(7)、松柏苷(8)、醉鱼草皂苷Ⅳb(9)、6-O-(3"-O-p-coumaroyl-α-L-rhamnopyranosyl)catalpol(10),其中化合物4、6、7、8、10为首次从醉鱼草属植物中分离得到,化合物2、3为首次从醉鱼草果实中分离得到;利用MPP+诱导的SH-SY5Y细胞模型对化合物1、5、6、7的神经保护作用进行活性筛选,结果显示四个化合物均能使细胞存活率显著提高。     

Phenolic compounds from the fruit of Garcinia dulcis

Dulcinoside (1), dulcisisoflavone (2), dulcisxanthone A (3) and sphaerobioside acetate (6) together with 22 known compounds were isolated from the green fruit of G. dulcis. Dulcisflavan (4), dulcisxanthone B (5) and isonormangostin (7) together with 22 known compounds were isolated from the ripe fruit. Compounds 6 and 7 were synthetic known compounds. Their structures were determined by spectroscopic methods. The radical scavenging and antibacterial activities of some of the compounds were investigated.     

Iridoid Derivatives with Cytotoxic Activity from Pedicularis uliginosa Bunge

Three new iridoids, rel‐(4aR,7S,7aS)‐7‐hydroxy‐7‐methyl‐1,4a,5,6,7,7a‐hexahydrocyclopenta[c]pyran‐4‐carbaldehyde ( 1 ), 1‐methoxy‐7‐methyl‐1,3,5,6‐tetrahydrocyclopenta[c]pyran‐4‐carbaldehyde ( 2 ), and rel‐(1R,4S,4aS,7R,7aR)‐7‐methylhexahydro‐1,4‐(epoxymethano)cyclopenta[c]pyran‐3(1H)‐one ( 3 ), together with seven known analogues, were isolated from the 95 % EtOH extract of the whole plants of Pedicularis uliginosa Bunge . Their structures were elucidated via extensive NMR spectroscopy and mass spectral data. In terms of inhibitory effects on human tumor cells, compounds 1 , 2 , 6 , 7 , and 8 exhibited better inhibitory activities against ACHN cells than the positive control (vinblastine).     

大管的化学成分研究

从小芸木属植物大管茎皮部位共分离得到12个化合物,运用MS、1H NMR和13C NMR等波谱方法并结合文献对照分别鉴定为5-formyl-6,7-dimethoxycoumarin(1),isoscoploletin-β-D-glucoside(2),6-(trans-1-buten-3-only)-7-methoxycoumarin(3),6-羟基-7-甲氧基香豆素(4),microfalcatin isovalerate(5),小芸木宁(6),丁香苷(7),coniferin(8),methyl 2-O-β-D-glucopyranosylbenzoate(9),2-hydroxy-5-methoxy-trans-cinnamic acid(10),3,5-二甲氧基-4-羟基苯甲醛(11)和邻仲丁基苯酚(12)。其中化合物1为新的天然产物;除5和6外,其余化合物均首次从该植物中分离得到。