Steroid compounds from far Eastern starfishes Henricia aspera and H. tumida

Six new natural compounds were isolated from two Far Eastern starfish species, Henricia aspera and H. tumida, collected in the Sea of Okhotsk. Two new glycosylated steroid polyols were obtained from H. aspera: asperoside A and asperoside B, which were shown to be (20R,24R,25S)-3-O-(2,3-di-O-methyl-beta-D-xylopyranosyl)-24-methyl-5alpha-cholest-4-ene-3beta,6beta,8,15a,16beta,26-hexaol and (20R,24R,25S,22E)-3-O-(2,4-di-O-methyl-beta-D-xylopyranosyl)-24-methyl-5alpha-cholest-22-ene-3beta,4beta,6beta,8,15alpha,26-hexaol, respectively. Two other glycosylated polyols, tumidoside A, with the structure elucidated as (20R,22E)-3-O-(2,4-di-O-methyl-beta-D-xylopyranosyl)-26,27-di-nor-24-methyl-5alpha-cholest-22-ene-3beta,4beta,6beta,8,15alpha,25-hexaol, and tumidoside B, whose structure was elucidated as (20R,24S)-3-O-(2,3-di-O-methyl-beta-D-xylopyranosyl)-5alpha-cholestan-3beta,4beta,6beta,8,15alpha,24-hexaol, were isolated from the two starfish species. (20R,24S)-Salpha-Cholestan-3beta,6beta,15alpha,24-tetraol and (20R,24S)-5alpha-cholestan-3beta,6beta,8,15alpha,24-pentaol were identified only in H. tumida. The known monoglycosides henricioside H1 and laeviuscolosides H and G were also identified in both species.     

Homoisoflavanones from Disporopsis aspera

From cytotoxic extracts of the roots of Disporopsis aspera Engl. (Liliaceae) a homoisoflavanone, disporopsin (3-(2',4'-dihydroxy-benzyl)-5,7-dihydroxy-chroman-4-one) (1) and three rare methyl-homoisoflavanones, 3-(4'-hydroxy-benzyl)-5,7-dihydroxy-6-methyl-chroman-4-one (2), 3-(4'-hydroxy-benzyl)-5,7-dihydroxy-6,8-dimethyl-chroman-4-one (3) and 3-(4'-hydroxy-benzyl)-5,7-dihydroxy-6-methyl-8-methoxy-chroman-4- one (4) along with five other known compounds, N-trans-feruloyl tyramine (5), adenine (6), 5-(hydroxymethyl)-2-furfural (7), beta-sitosterol (8) and beta-sitosteryl glucopyranoside (9) were isolated. The structures of compounds 1-2 were elucidated by spectral data (1, 2-D NMR and EIMS). The four homoisoflavanones (1-4) were found to be cytotoxic against a series of human cancer cell lines (HCT15, T24S, MCF7, Bowes, A549 and K562) with IC(50) ranging from 15 to 200 microM. Possible biosynthesis routes for homoisoflavonoids (1-4) are discussed.     

Sesquiterpenes from Centaurea aspera

The aerial parts of two subspecies of Centaurea aspera L. (Asteraceae) yielded the germacranolides 1a-h, 2, 3, 4 and 5, the elemane derivatives 6d and 6f, the lignan matairesinol, the degraded terpene loliolide, and the onopordopicrin-valine dimeric adduct 7. From these, compounds 1e, 3 and 6d are natural products. The chemical composition of the two subspecies is very similar, a circumstance which does not support a taxonomic subdivision of the species.     

Studies on Chemical Constituents of Fritillaria yuminensis

Six compounds were isolated from the bulbs of Fritillaria yuminensis X. Z. Duan. They were elucidated as 5α, 14α-cevanine-3α-hydroxy-6-one ( Ⅰ ), 5α, 14α-cevanine-3-one-6β-O-β-D-glucoside ( Ⅱ ), imperialine ( Ⅲ ), delavinone ( Ⅳ ), tortifolisine ( Ⅴ ) and adenosine( Ⅵ ) by means of spectral analysis and chemical reaction. They all were firstly isolated from this plant. Among them, compound Ⅰ and Ⅱ, named yubeinine and yubeiside respectively, were new compounds.     

山木通的化学成分研究

目的：对毛茛科铁线莲属植物山木通的化学成分进行提取、分离和鉴定。方法：用不同浓度乙醇提取,利用硅胶、SephadexLH-20、ODS柱色谱法对山木通的化学成分进行分离,根据理化性质和MS、NMR光谱数据进行结构鉴定。结果：经鉴定得到7个化合物,分别为β-谷甾醇（Ⅰ）;正二十二烷（Ⅱ）;3-羰基齐墩果烷（Ⅲ）;正十六烷酸（Ⅳ）;正二十六烷酸（Ⅴ）;丁香酸（Ⅵ）;5-羟基4-氧代戊酸（Ⅶ）。结论：所得化合物均为首次从该种植物中得到。     

河南蹄叶橐吾根的化学成分研究

从蹄叶橐吾根乙醇提取物中分离得到11种化合物,经理化和波谱分析分别鉴定为原儿茶醛(1)、7-羟基-色原酮(2)、咖啡酸(3)、阿魏酸(4)、1,5-二咖啡酰奎宁酸(5)、当归酸(6)、β-谷甾醇(7)、胡萝卜苷(8)、蜂斗菜素(9)、异蜂斗菜素(10)及正三十五烷(11)。其中酚类化合物1～5、倍半萜类化合物9～10及脂烃11为首次从该植物中分离得到。     

滇南蛇根草化学成分的研究

采用柱色谱技术从药用植物滇南蛇根草Ophiorrhiza austroyunanensis Lo.全草的甲醇提取物分离得到9个化合物,利用理化性质及波谱方法分别鉴定为β-谷甾醇(1)、β-豆甾醇(2)、β-胡萝卜苷(3)、白桦脂醇(4)、叶黄素(5)、东莨菪素(6)、熊果酸(7)、茜根酸-1-甲醚(8)和豆甾醇-3-O...     

西南远志中皂苷类成分的分离与鉴定

采用乙醇回流提取,通过硅胶柱、HPD100大孔树脂、Sephadex LH-20、半制备HPLC分离方法,运用现代谱学方法从西南远志中分离并鉴定了4个齐墩果酸型皂苷类化合物,均为顺反异构体,所用实验方法并不能有效分开。他们分别是:(E/Z)-PolygalasaponinXLIV(1),3-O-β-D-glucopyranosyl presenegenin 28-O-β-D-galactopyr-anosyl-(1→4)-β-D-xylopyranosyl-(1→4)-α-L-rhamnopyranosyl-(1→2)-[6-O-acetyl-β-D-glucopyranosyl-(1→3)]-{4-O-([E/Z)-3,4-dimethoxycinnamoyl}]-β-D-fucopyranosyl ester(2),(E/Z)-PolygalasaponinXXX(3)(,E/Z)-senegasaponin C(4),均为首次从该种植物中分离得到。     

The Chemical Constituents of Elsholtzia densa Benth.

Ten compounds were isolated from Elsholtzia densa Benth. and their structures were identified by spectral and chemical methods as following: n-nonacosane (1), succinic acid (2), 5- ( 3 ”, 3 ”-dimethylallyl ) -8-methoxyfurocoumarin (3), 5- ( 3 ”-methylbutyl) -8- methoxyfurocoumarin (4), 5- (3”-hydroxy-3”-methylbutyl) -8-methoxyfurocoumarin (5), 3, 4-dihydroxycinnamic acid ( 6 ), 5-hydroxy-3’-methoxyflavanone-7-O-rutinoside ( 7 ), quercetin-3-O-β-D-glucoside ( 8 ), kaempferol-3-O-β-D-glucoside ( 9 ), 5-hydroxy-4’- methoxyflavone-7-O-rutinoside (10). Among them, compounds 4 and 5 are new naturally occurring furocoumarins.     

米邦塔仙人掌化学成分研究

从米邦塔仙人掌正丁醇部分分离到10个化合物。应用色谱和光谱分析方法分别鉴定为对羟基苯甲酸(1)、β-羟基-3-甲氧基-4-羟基苯乙酮(2)、2,3,4-三羟基戊酸(3)、4-甲氧基桂皮酸(4)、3-羟基-4-甲氧基肉桂酸(5)、5-羟基阿魏酸(6)、4-羟基肉桂酸(7)、原儿茶酸(8)、n-butyl eucomate(9)和eucomic acid(10)。化合物2～10为首次从该植物分离得到。     

元宝山冷杉化学成分的研究

采用色谱技术对元宝山冷杉的化学成分进行分离,根据波谱学方法确定化合物的结构。结果从元宝山冷杉中分离得到5个单体化合物,分别鉴定为:3α-甲氧基-9β-羊毛甾-7,24-二烯-26,23R-内酯(1)、β-谷甾醇(2)、6-甲基-3,7-二甲氧基山奈酚(3)、3-氧代-羊毛甾(9,11)-烯-24S,25-二醇(4)、豆甾-4-烯-6β-羟基-3-酮(5)。所有这些化合物均为首次从该植物中分离得到。     

海洋放线菌Streptomyces variabilis strain 6-1次级代谢产物的研究

目的:对来自海洋软珊瑚的链霉菌6-1(Streptomyces variabilis strain 6-1)进行次级代谢产物的分离和鉴定,寻找具有生物活性的化合物,为人类健康服务。方法:采用液体培养基对分自海洋软珊瑚Scleronephthya sp中的链霉菌6-1(Streptomyces variabi-lis strain 6-1)进行发酵培养,用乙酸乙酯对发酵液进行萃取;采用半制备高效液相色谱(semi-preparative HPLC)分离方法对乙酸乙酯萃取物进行分离纯化,得到单体化合物;运用电喷雾质谱(ESI-MS)、核磁共氢振(1H NMR)、核磁共振碳谱(13C NMR)和物理性质对所得单体化合物进行结构鉴定。结果:从海洋链霉菌6-1(strain 6-1)发酵液的乙酸乙酯萃取物中分离得到3个单体化合物,分别鉴定为:7,4'-二羟基异黄酮(1)、5,7,4'-三羟基异黄酮(2)和丁烯酸内酯-Ⅰ(3)。结论:丁烯酸内酯-Ⅰ是从链霉菌属首次分离得到,化合物1和2均是从Streptomyces variabilis中首次分离得到;变异链霉菌6-1(Streptomyces variabilis strain 6-1)可以作为活性化合物3(丁烯酸内酯-Ⅰ)的重要来源。     

射干叶中异黄酮类化学成分的研究

从海南产射干叶中分得8个异黄酮类化合物,通过理化常数测定和光谱分析其化学结构分别鉴定为鸢尾黄酮新苷A(iristectorin A,1)、野鸢尾苷(iridin,2)、鸢尾苷(tectoridin,3)、鸢尾苷元(tectorigenin,4)、次野鸢尾黄素(irisflorentin,5)、染料木素(genistein,6)、染料木苷(genistin,7)、樱黄素(Prunetin,8)。所有化合物均为首次从射干叶中分离得到,其中化合物7和8为首次从鸢尾科植物中分离。     

夏至草亲水性化学成分的研究

从夏至草正丁醇萃取物中分离得到6个化合物,运用光谱技术和化学方法鉴定了其中5个化合物的结构,其中1个为无机化合物KNO3（La1)另外4个为苯丙素甙,分别为purpureaside(La2),acteoside(La3),cistanoside B(La4),jionosideA(La5),均为首次从该属植物中获得。     

The Chemical Constituents from Podocarpus brevifolius

Ten compounds were isolated from the barks and leaves of Podocarpus brevifolius (Podocarpaceae) for the first time. They are identified as isokaurene (1), △9- isoclextropimaric acid (2), isoginkgetin (3), sciadopitysin (4), amentoflavone-4′,4″′, 7, 7″-tetramethylether (5), sequoyitol (6), β-sitosterol (7), daucosterol (8), β-sitosterone (9), and 3β, 6β-dihydroxy-stigmast-4-ene (10) by means of spectral analysis, comparison of physio-chemical data and throgh chemical method.     

The Chemical Constituents in Dacrydium pierrei

Nine compounds are isolated from the leaves and branches of Dacrydiurn pierrei Hickle for the first time. Comparison of physico-chemical data were assayed by means of spectrometry chemical analysis. They are identified as sotetsuflavone (1), amentoflavone-4', 4'", 7, 7"-tetramethyl-ether (2), trans-communic acid (3), 19- hydroxy-totarol (4), 12-methoxy-dehydro-abietic acid (5), (+) phyllocladene (6), daucosterol(7), β-sitosterol (8), and n-tetratriacontanol (9).     

皱皮杜鹃的化学成分

从皱皮杜鹃(Rhododendron wiltonii Hemsl.et wils.)叶中分出6种成分,根据理化性质和紫外、红外、核磁共振及质谱分析,分别鉴定为:熊果酸(ursolic acid)、(+)-儿茶素[(+)-catechin]、槲皮素(quercetin)、山柰素(kaempferol)、蓼属甙(polystachoside)和山奈素-3-O-阿拉伯糖甙(kaempferol-3-O-arabinoside)其中,蓼属甙和山柰素-3-O-阿拉伯糖甙系从中国杜鹃属植物中首次获得。     

色钉菇子实体化学成分及其生物活性初探

从色钉菇Chroogomphus rutilus子实体中分离纯化出11种化合物,经核磁等方法鉴定为：（1）麦角甾-7,22-二烯-3-酮;（2）麦角甾-4,6,8(14), 22-四烯-3-酮;（3）邻苯二甲酸二丁酯;（4）顺式-3-己烯醇;（5）3β,5α,6β-三羟基麦角甾-7,22-二烯;（6）α-甜没药醇;（7）2-甲氧基腺嘌呤核苷;（8）(4E,8E)-2-N-(2-羟基棕榈酰)-1-O-B-D-吡喃葡萄糖基-9-甲基-4, 8-sphingadienine;（9）5-羟基尿嘧啶核苷;（10）2-氨基-3-醛基-6-甲氧基吡啶;（11）Polyozellin。对分离化合物的体外抗氧化、抗肿瘤活性的初步测定结果显示,2-甲氧基腺嘌呤核苷、顺式-3-己烯醇表现出较强的清除DPPH自由基活性,EC50值分别为0.06128mg/mL和0.08253mg/mL。5-羟基尿嘧啶核苷对人胃癌细胞株BGC的增殖有较强的抑制作用,IC50值为7.92μg/mL。研究结果为进一步开发利用色钉菇提供了科学依据。     

Cytotoxic alkaloids from the bulbs of Fritillaria hupehensis

Phytochemical investigation of the bulbs of Fritillaria hupehensis resulted in the isolation and structural elucidation of four new steroidal penta- and hexacyclic veratraman- and cevan-based alkaloids, respectively, compounds 1-4. They were obtained together with the known constituents ebeinine (5) and zhebeinine (6), which were isolated for the first time from this plant. The structures of the new isolates were established by spectroscopic and mass-spectrometric analyses, in combination with chemical methods. All compounds were assayed for their cytotoxic effects towards HeLa and HepG2 cell lines. Compounds 1 and 2 showed significant inhibitory effects against both types of tumor cells, with IC(50) values in the range 2.52-0.23 microM, similar as those for 5-fluorouracil used as positive control.     

马兰化学成分研究 （Ⅱ）

采用冷渗漉提取的方法提取马兰的化学成分。经硅胶柱色谱和Sephadex LH-20进行分离纯化,通过理化方法和波谱数据分析进行结构鉴定。从80%乙醇冷渗漉提取物的水不溶物中分离并鉴定了12个化合物,分别为正十六烷酸(1)、6-羟基-桉烷-4(14)-烯(2)、β-谷甾醇(3)、α-菠菜甾醇(4)、香草醛(5)、β-20(21),24-二烯-达玛烷-3-酮(6)、豆甾醇(7)、木栓酮(8)、羽扇豆酮(9)、α-香树脂醇(10)、表木栓醇(11)、神经酰胺(12)。化合物2、6、9、12均为首次从该种植物中分得。