藏药臭蚤草的一个新的苯丙素苷类成分

为了研究藏药臭蚤草的浩性成分,我们利用各种柱色谱技术,从藏药臭蚤草甲醇提取物的乙酸乙酯萃取相分离到4个化合物,通过1D、2DNMR、MS和HRMS等试验,鉴定为2,4-dihydroxy-6-methyl—ethanone-4-O-β-D—Glc（1）,4-（3’-hydroxypropyl）-2,6-dimethoxyphenol-3’-O-β-D—glcoside（2）,4-allyl-2-methoxyphenol-1-O-β-gleo—side（3）,2-methyl-1,3,6-trihydroxy-9,10-anthraquinone-3—O-（6＇-O-Ac）-α—L—Rha-（1→2）-β-D—Gle（4）,其中化合物1—3为苯丙素苷类化合物,化合物4为蒽醌苷。化合物1—4都是首次从该属植物中分离得到,化合物1为新的苯丙素苷类化合物。     

臭草二氯甲烷部位化学成分研究

为研究臭草(Ruta graveolens L.)地上部分的化学成分及其抗Epstein-Barr病毒(EBV)活性。本研究采用硅胶等柱色谱和制备液相色谱等手段对臭草地上部分的95%乙醇浸提物二氯甲烷萃取部位进行分离纯化,并根据理化性质和谱学数据对化合物结构进行鉴定,鉴定后化合物进行抗EBV活性测试。从臭草乙醇提取物二氯甲烷萃取部分离得到30个化合物,分别鉴定为山小柑碱(1)、2-羟基-3-异丙氧基-1,4-甲氧基-10-甲基吖啶酮(2)、芸香日酮(3)、1-羟基-3-甲氧基-N-甲基吖啶酮(4)、羟甲基吖啶酮环氧化物(5)、rutalinium(6)、(-)-日把里尼定(7)、ribalinium(8)、(+)-ribaline(9)、γ-fagarine(10)、香草木宁碱(11)、合帕洛平(12)、茵芋碱(13)、(-)-去乙酰基芸香苦素(14)、chalepensin(15)、(+)-芸香瑞亭(16)、花椒毒素(17)、补骨酯素(18)、佛手柑内酯(19)、7-preniloxicumarin(20)、异东莨菪素(21)、6-羟基香豆素(22)、东莨菪苷(23)、芸香灵(24)...     

臭阿魏化学成分研究

用95%乙醇提取,溶剂萃取,硅胶柱色谱分离等方法从臭阿魏根中提取分离得到9个化合物,根据NMR,EI-MS等光谱学方法分别鉴定为:badrakemin(1),badrakemin acetate(2),badrakemone(3),feshurin(4),feshurinacetate(5),feterin(6),colladonin(7),孕甾-4-烯-3,20-二酮(8),胡萝卜苷(9)。其中化合物4、5、7、8和9为首次从该植物中分得。     

藏药短管兔耳草挥发性化学成分的研究

采用毛细管气相色谱—质谱联用技术对藏药短管兔耳草挥发性化学成分进行了研究,经毛细管色谱分离出62个峰,共确定了其中41种化学成分,所鉴定的化合物含量占全挥发油的77．32％;用气相色谱面积归一化法测定了各化学成分的相对含量,其主要化学成分为：二苯胺(16．47％)、邻苯二甲酸丁基—8—甲基壬基酯(6．42％)、二十六碳烷(4．76％)、十六烷酸(3．66％)、二十四碳烷(3．40％)、邻苯二甲酸二丁酯(3．38％)、二十二碳烷(3．30％)、二十碳烷(3．26％)、十六烷酸乙酯(2．77％)、十八碳烷(2．76％)、戊酸(2．48％)、3—乙基环辛烯(2．05％)等。     

荔枝草中一个新的倍半萜

为了研究荔枝草全草中的倍半萜类化学成分,该文运用大孔吸附树脂D101、MCI、硅胶和反相HPLC等色谱技术对其进行分离纯化,根据HR-ESI-MS、NMR波谱数据鉴定了化合物的结构。结果表明:从荔枝草全草95%乙醇提取物的乙酸乙酯部位中分离得到3个桉叶烷型倍半萜类化合物,分别鉴定为8-ethoxy-eudebeiolide B(1)、salplebeone D(2)、salplebeone A(3)。其中,化合物1为新化合物。     

外来入侵植物假臭草的黄酮类成分研究

从外来入侵植物假臭草的70%乙醇提取物的乙酸乙酯萃取物中分离得到5个黄酮化合物,利用波谱方法鉴定为5,6,7,4′-四甲氧基黄酮(1),7-羟基-5,6,4′-三甲氧基黄酮(2),4′-羟基-5,6,7-三甲氧基黄酮(3),5,4′-二羟基-6,7-二甲氧基黄酮(4),5,7,4′-三羟基-6-甲氧基黄酮(5).化合物1～5均首次从该植物中分离得到.     

假臭草对菜青虫杀虫活性的研究

测定了假臭草根、茎、叶的甲醇提取液对菜青虫的生物活性。结果表明假臭草根、茎、叶的甲醇提取液对菜青虫无触杀活性;假臭草提取液对菜青虫的拒食活性强弱依次为叶茎根,在浓度为1 g/mL时拒食率分别为36.51%、63.34%和79.33%;假臭草茎和叶的甲醇提取液对菜青虫有一定的胃毒作用,在浓度为1 g/mL时,假臭草叶和茎甲醇提取液对菜青虫的胃毒活性分别为66.67%和33.33%。     

藏药提宗龙胆花的化学成分研究

从传统藏药提宗龙胆(Gentiana tizuensisFranch.)花的乙醇提取物中分离得到3个化合物,利用波谱方法鉴定为熊果酸(ursolic acid,1)、异荭草苷(isooreintin,2)、日本獐牙菜素(swertiajaponin,3).其中,化合物2为首次从该植物中发现,化合物3为龙胆属植物中首次发现.     

不同生境下假臭草生长特征分析

通过测定庄稼地、弃耕地、桉树林、公路边4种生境下假臭草叶面积(LA)、比叶面积(SLA)、LDMC和株高等形态特征、植株各构件生物量及生物量分配比和假臭草种群盖度、密度等种群数量性状,研究不同生境类型下假臭草个体的形态特征、生物量及生物量分配和种群生长状况的差异。结果表明:光照和土壤养分对假臭草的形态特征、生物量及生物量分配和种群数量性状的影响显著;低光照、高土壤养分生境下假臭草的LA、SLA、株高较高,假臭草叶片的LDMC较小,植株的花序数较少,生物量主要向叶和茎器官进行分配,根和花果器官的生物量分配则受到限制;高光照、养分贫瘠生境下假臭草的LA、SLA、株高较低,假臭草叶片的LDMC较大,生物量主要向根和花果器官进行分配,种群的盖度、密度、生物量和高度等种群数量性状较低,种群生长状况较差;高光照、肥沃养分生境为假臭草的最适生境,假臭草构件的资源配置较为优化,株高、基径粗、冠宽和花序数等形态指标较大,种群盖度、密度、生物量等种群数量性状较大,种群生长较好。     

臭灵丹中四个新的倍半萜酸

从云南省芒市产臭灵丹［Ｌａｇｇｅｒａｐｔｅｒｏｄｎｔａ（ＤＣ．）Ｂｅｎｔｈ］中,分离得以４个新的桉烷型倍半萜酸,结构鉴定为５,１２－二烯－桉烷－１３－酸（１）;１β－式－５,１２－二烯－桉烷－１３－酸（２）;３β－羟基－５,１２－二烯－桉烷－１３－酸（３）。     

Caryophyllane derivatives from Pulicaria scabra

The investigation of Pulicaria scabra afforded in addition to known compounds seven new caryophyllane derivatives, three of them etherified with a caryophyllane derivative and one esterified with a caryophyllane derived alcohol. The structures were elucidated by high field ¹H NMR spectroscopy. The chemistry of this species is similar to that of P. dysenterica but differs from that of the other genera of the subtribe Inulinae.     

Clerodane diterpenoids from Pulicaria wightiana

Five clerodane diterpenoids have been isolated from the aerial parts of Pulicaria wightiana along with 3'5,6-trihydroxy-3,4',7-trimethoxyflavone and 2-methyl-5-hydroxy-chroman-4-one. The structures and stereochemistry of the compounds were established from spectral (mainly 1D and 2D NMR) studies. The last two compounds were not reported earlier from this plant. The antibacterial activity of the diterpenoids were studied.     

Caryophyllene derivatives from Pulicaria arabica

The aerial parts of Pulicaria arabica afforded in addition to known caryophyllene derivatives seven new ones. The configuration at C-11 of previously reported derivatives has to be corrected as followed from the observed NOEs.     

Sesquiterpenoids from Chloranthus multistachys

An 8,9-seco-lindenane disesquiterpenoid, chloramultiol G, four eudesmane sesquiterpenoids, ent-(3R)-3-hydroxyatractylenolide III and multistalactones A–C, and four guaiane sesquiterpenoids, (1R,4S,5R,8S,10S)-zedoalactone A and multistalactones D–F, along with 14 known compounds, were isolated from whole plant tissues of Chloranthus multistachys. Their structures were established by extensive NMR experiments in conjunction with mass spectrometry. Except for chloramultiol G, the absolute stereochemistries of the other eight were confirmed by single-crystal X-ray crystallography and CD spectra. Nine compounds were tested for cytotoxicity against five human tumor cell lines and for antifungal activity against four microorganisms in vitro, but all were inactive.     

Diterpenes derived from clerodanes from Pulicaria angustifolia

The investigation of Pulicaria angustifolia afforded, in addition to known triterpenes and caryophyllene epoxide, four methyl esters of diterpenes, all derived from clerodane. Three of them are derivatives of seco-nidoresedic acid. The structures were elucidated by spectroscopic methods.     

Sesquiterpenoids from petasites fragrans

Chemical analysis of Petasites fragrans yielded the eremophilane type of sesquiterpenes: petasol, isopetasol, S-petasin, neo-S-petasin, and a mixture of petasol derivatives, with caffeic acid methyl ester and a mixture of phytosterols. Their structures were elucidated by chemical and spectroscopic methods.     

Sesquiterpenoids from Ferula kuhistanica

Methanol extracts of the air-dried roots and stems of Ferula kuhistanica afforded seven daucane-type sesquiterpenes, called kuhistanicaol A-G, together with 13 known daucane esters. Their structures were established on the basis of spectroscopic evidence and the results of chemical reactions.     

Rare hydroperoxyl guaianolide sesquiterpenes from Pulicaria undulata

Pulicaria species, such as Pulicaria undulata, are rich in sesquiterpene lactones. The methylene chloride/methanol (1:1) extract of P. undulata resulted in the isolation of new sesquiterpenes (1–4), as well as previously reported metabolites (5–14). Structures were elucidated by spectroscopic analyses. Using a mouse peritoneal macrophage bioassay, lipopolysaccharide-induced nitric oxide inhibition was observed with the eudesman-type sesquiterpene 1β,4β-dihydroxy-5αH,7αH,8α-guaia-10(14),11(13)-dien-8β,12-olide (11) at an EC₅₀ of 7.2 μM.     

黄鞘蕊花中的艾里莫芬烷型倍半萜(英文)

从黄鞘蕊花 (ColeusxanthanthusC .Y .WuetY .C .Huang)的乙酸乙酯部分首次分离得到 3个艾里莫芬烷型倍半萜类化合物 ( 1～ 3) ,其结构由NMR波谱技术及单晶X衍射分析确定。其中 ,化合物 1为新化合物 ,命名为 8,9_断裂_艾里莫芬_1 ( 1 0 ) ,7( 1 1 )_二烯_8,1 2_内酯_9_酸。首次对化合物 2 ( 2 ,9_二氧代优瑞坡森 )和 3( 9_氧代宽眼菊素 )的1H NMR和13C NMR谱进行了全归属。