偏翅唐松草化学成分的研究

从偏翅唐松草（Thalictrum delavayi Franch.)的乙醇提取物的氯仿部分分离到9个化合物（1-9）。其中化合物1和2为新化合物,分别为5-hydro-N-methylcorydalidine(1)和1-（4-methoxybenzyl)-2-N-methyl-6-hydroxyl-5,7-dimethoxy-isoquinoline(2)。化合物7为首次从唐松草属中分离到,它们的结构经波谱方法（包括HMQC和HMBC）得到鉴定。     

延胡索的化学成分研究(英文)

采用现代分离技术和方法,从延胡索根茎中分离得到17个化合物,通过波谱分析鉴定其结构。包括11个生物碱类化合物,二氢白屈菜红碱(1)、去氢紫堇碱(2)、四氢非洲防己胺(3)、异紫堇球碱(4)、紫堇碱(5)、四氢黄连碱(6)、药根碱(7)、黄连碱(8)、小檗碱(12)、巴马汀(13)和延胡索乙素(14);2个蒽醌类化合物,大黄素(9)和大黄素甲醚(10);1个三萜类化合物,即3β-羟基-齐墩果烷-111,3(18)-二烯-28-酸(11)和3个甾醇类化合物,豆甾醇(15)、β-谷甾醇(16)和胡萝卜苷(17)。其中,化合物9～11首次从该属植物中分离得到,1首次从该种中分离得到。     

华东唐松草生物碱的研究

从安徽省产的毛茛科植物华东唐松草(Thaliczrum fortunei S.Moore)的全草中分离得三个结晶,经光谱和衍生物制备等方法,确定化合物1和2为双苄基异喹啉生物碱,化合物1为7-5′,11-12′型的新生物碱,命名为华东唐松草碱(thalifortine,1),化合物2为已知生物碱aromoline(2),化合物3为 N-phenyl-2-naphthy]amine(3)。     

滇产偏翅唐松草化学成分

提取、分离纯化并通过波谱方法鉴定了滇产偏翅唐松草 (ThalictrumdelavayiFranch)中 7个化合物 ,它们为 :3,4 二氢 6 ,7 二甲氧基异喹诺酮 (1) ,N 甲基紫堇碱 (2 ) ,6 ,7 二甲氧基 2 甲基异喹诺酮(3) ,Thalactamine(4) ,小檗碱 ,(5 ) ,4 (4 甲氧基苯基 ) 3 丁烯 2 酮 (6 ) ,降氧白毛茛分碱 (7) ,其中化合物(7)首次从唐松草属中分离得到。     

鞭打绣球中的一个新单萜苷

从鞭打绣球(Hemiphragma heterophyllum Wall.)全草中分离到1个新单萜苷和7个已知化合物.通过波谱数据分析,新单萜苷的结构鉴定为(4S)-α-萜烯醇-8-O-β-D-比喃木糖-(1→6)-β-D-比喃葡萄糖苷,已知化合物分别鉴定为globularin(2)、(2S 3S,4R,9E)-1,3,4-trihydroxy-2-[(2'R)-hydroxy-tetracosanoylamino]-9-octadecene(3)、β-香树素(4)、齐墩果酸(5)、肉桂酸(6)、β-谷甾醇(7)和胡萝卜甙(8).除化合物2外,其余化合物均为首次从鞭打绣球中分离得到.     

异叶三宝木叶的化学成分研究(英文)

从异叶三宝木(Trigonostemon flavidus)叶中分离得到9个化合物,经波谱数据分析鉴定为robustic acid(1),1-[6-hydroxy-2-methoxy-2″,2″-dimethylpyrano-(5″,6″:3,4)]-2-(4’-methoxyphenyl)-1,2-ethanedione(2),3β-ursolic acid(3),(6S,7E)-6-hydroxy-4,7-megastigmadien-3,9-dione(4),3(-hydroxy-5,6-epoxy-7-megastigmen-9-one(5),(3R,6R,7E)-3-hydroxy-4,7-megastigmadien-9-one(6),loliolide(7),methyl P-coumarate(8),和methyl si-napate(9)。化合物1～7和9为首次从三宝木属(Trigonostemon)植物中分离得到。     

相思子化学成分研究

本研究从相思子种子的乙醇提取物中首次分离得到8个化合物,通过理化性质及光谱分析鉴定其结构为N-9-甲基-β-咔啉(1)、异喹啉酮(2)、吲哚-3-羧酸(3)、2,3-二甲氧基-5,7-二羟基-二氢黄酮(4)、3-羟甲基呋喃醛(5)、3-羟基-2-甲基-4-吡喃酮(6)、豆甾醇-4,22-二烯-3-酮(7)和(6E,6’E)-2-hydroxypropane-1,3-diylbis(octadec-6-enoate)(8)。同时还得到13个其他成分。     

枸骨叶的化学成分研究

采用溶剂提取和柱层析色谱分离,根据化合物理化性质和光谱数据鉴定其结构.结果从枸骨叶中分离得到9个化合物,分别为羽扇豆醇(1)、3,28-乌苏酸二醇(2)、熊果酸(3)、异鼠李黄素(4)、山奈酚-3-O-β-D-葡萄糖苷(5)、地榆苷Ⅰ(6)、槲皮苷-3-O-β-D-葡萄糖苷(7)、异鼠李素-3-O-β-D-葡萄糖苷(8)、冬青苷Ⅱ(9).化合物7和8为首次从冬青属植物中分离得到,化合物5为首次从该植物中分离得到,同时首次报道了化合物9的13CNMR数据.     

三丫苦的化学成分研究

采用硅胶柱层析从三丫苦的乙酸乙酯萃取物中分离得到6种化合物,经波谱分析鉴定为4,7-二甲氧基呋喃喹啉生物碱(1)、顺式-3,4,5-三羟基-6-乙酰基-7-甲氧基-2,2-二甲基色烷(2)、3-羟基-4-乙氧基-5,7-二甲氧基-6-乙酰-2,2-二甲基色烷(3)、3,5-二羟基-4-乙氧基-6-乙酰基-7-甲氧基-2,2-二甲基色烷(4)、异吴茱萸酮酚(5)和异吴茱萸酮酚甲醚(6)。所有化合物均首次从该植物的根部分离得到。     

对叶榕叶和细枝的化学成分研究

采用柱色谱法从对叶榕FicushispidaL.叶和细枝的95%甲醇溶液中分离得到10个化合物。通过理化性质和波谱数据分析分别鉴定为α-豆甾醇(1)、正癸烷(2)、叶黄素(3)、乌苏酸(4)、豆甾醇-3-O-β-D-葡萄糖苷(5)、7-羟基香豆素(6)、香草酸(7)、齐墩果酸-28-O-α-D-吡喃葡萄糖苷(8)、异紫堇定碱(9)和原阿片碱(10)。化合物9和10首次从该植物中分离得到。     

The mitochondrial benzodiazepine receptor: Evidence for association with the voltage-dependent anion channel (VDAC)

Specific, high-affinity receptors for numerous drugs have recently been localized to mitochondrial membrane proteins. This review discusses the association of the mitochondrial receptor for benzodiazepines (mBzR) with the voltage-dependent anion channel (VDAC), indicating a possible auxiliary role for VDAC as a putative drug binding protein. The proposed subunit composition of the purified mBzR complex isolated from rat kidney mitochondria includes VDAC, which functions as a recognition site for benzodiazepines (e.g., flunitrazepam), the adenine nucleotide carrier (ADC), and an 18 kDa outer membrane protein identified by covalent labelling with the mBzR antagonists isoquinoline carboxamides (e.g., PK 14105).Abbreviations and chemical names: Ro5-4864: 7-chloro-1,3-dihydro-1-methyl-5-(p-chlorophenyl)-2H-1,4-benzodiazepin-2-one; Ro15-1788: ethyl 8-fluoro-5,6-dihydro-5-methyl-6-oxo-4H-imidazo[1,5-]-[1,4]benzodiazepine-3-carboxylate; AHN-086: (1-(2-isothiocyanatoethyl-7-chloro-1,3-dihydro-5-(4-chlorophenyl)-2H-1,4-benzodiazepin-2-one hydrochloride;) PK11195: 1-(2-chlorophenyl)-N-methyl-N-(1-methylpropyl)-isoquinoline-3-carboxamide; PK14105: 1-(2-fluoro-5-nitrophenyl)-3-isoquinoline-carboxylic acid.     

Platinum(II) and copper(I) 1-(2-diphenylphosphino-1-naphthyl) isoquinoline complexes: Synthesis and phosphorescence at ambient conditions

The compounds Pt(quinap)(CN)₂, and [Cu(quinap)I]₂ with quinap = 1-(2-diphenylphosphino-1-naphthyl)isoquinoline were synthesized. Quinap is a bidentate ligand which contains a isoquinoline and an arylphosphine group with CT acceptor properties. Accordingly, the Pt(II) and Cu(I) quinap complexes are characterized by a phosphorescence originating from the lowest-energy MLCT triplets with some IL admixture.     

Six New Constituents from the Fruit of Hypericum patulum and Their Anti-Inflammatory Activity

Four new xanthone glucosides, 3-hydroxy-2-methoxyxanthone-4-O-β-D-glucopyranoside ( 1 ), 4,8-dihydroxy-2-methoxyxanthone-3-O-β-D-glucopyranoside ( 2 ), 2-methoxyxanthone-5-O-β-D-glucopyranoside ( 3 ), 4-hydroxy-2-methoxyxanthone-3-O-β-D-glucopyranoside ( 4 ), a new phenolic acid, 4,4′-dihydroxy-3,3′-imino-di-benzoic acid monomethyl ester ( 5 ), and a new isoquinoline, methyl 6-hydroxy-1-oxo-1,2,3,4-tetrahydroisoquinoline-4-carboxylate ( 6 ) were isolated from the fruit of Hypericum patulum. The structural elucidation of the isolated compounds was primarily based on HR-ESI-MS, UV, IR, 1D and 2D NMR. All compounds were evaluated for their inhibitory effect against LPS-induced NO production in RAW 264.7 cells. Compound 2 , 3 exhibited moderate inhibitory activity against NO production.     

The synthesis of 2-nitroaryl-1,2,3,4-tetrahydroisoquinolines, nitro-substituted 5,6-dihydrobenzimidazo[2,1-a]isoquinoline N-oxides and related heterocycles as potential bioreducible substrates for the enzymes NAD(P)H: quinone oxidoreductase 1 and E. coli nitroreductase

A series of 2-nitroaryl-1,2,3,4-tetrahydroisoquinolines 10 and nitro-substituted 5,6-dihydrobenzimidazo[2,1-a]isoquinoline N-oxides 11 have been synthesised and evaluated as potential bioreducible substrates for the enzymes NAD(P)H: quinone oxidoreductase 1 (NQO1) and Escherichia coli nitroreductase (NR). Also prepared and evaluated were 2-(3,5-dinitropyridin-2-yl)-1,2,3,4-tetrahydroisoquinoline 12 and 5,6-dihydro-10-nitropyrido[3″,2″:4′,5′]imidazo[2′,1′-a]isoquinoline 12-oxide 13. Both compounds 10b and 13 were reduced faster by human NQO1 than by CB-1954 [5-(aziridin-1-yl)-2,4-dinitrobenzamide].     

滇牡丹内生真菌Alternaria sp.PR-14的代谢产物研究

从滇牡丹内生真菌交链孢霉属(Alternaria sp.)菌株PR-14的发酵液提取物中分离得到6个化合物,通过波谱技术分别鉴定为交链孢酚(1)、djalonensone(2)、脑苷酯B(3)、脑苷酯C(4)、(2S,3S,4R,2’R)-2-(2’-hydroxytetracosanoylamino)octadecane-1,3,4-triol(5)和甘露糖醇(6),以上化合物均为首次从滇牡丹内生真菌中分离得到。     

Isoquinoline and isoindole alkaloids from Menispermum dauricum

Three isoquinoline alkaloids and an isoindole alkaloid, along with eight known compounds, were isolated from the roots of Menispermum dauricum (Menispermacese). The alkaloids were characterized as 7-hydroxy-6-methoxy-1(2H)-isoquinolinone, 6,7-dimethoxy-N-methyl-3,4-dioxo-1(2H)-isoquinolinone, 1-(4-hydroxybenzoyl)-7-hydroxy-6-methoxy-isoquinoline and 6-hydroxy-5-methoxy-N-methylphthalimide, on the basis of spectral evidence including 1D- and 2D-NMR and MS analyses.     

Cultivation of Thalictrum rugosum cell suspension in an improved airlift bioreactor: stimulatory effect of carbon dioxide and ethylene on alkaloid production

Airlift bioreactor operations have been studied for the growth-associated production of secondary metabolites from plant cell suspension cultures. The model system used in this work was Thalictrum rugosum producing berberine, an isoquinoline alkaloid. The airlift system was well suited for growth of Thalictrum cell suspension cultures unless the cell density was high. At high cell density, the airlift system with a draught tube was not adequate due to large aggregates clogging the recirculation paths. This was overcome by use of a cell scraper in the reactor. For berberine production, gas-stripping also played a significant role and it was discovered that CO(2) and ethylene were important for product formation. By supplying a mixture of CO(2) and ethylene into the airlift system, the specific berberine content was increased twofold. It is evident that continuous gas sparging was harmful for the production of berberine without supplementation with other gases.