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从短距乌头(Aconitum brevicalcaratum Diels)的根中分得六个二萜生物碱成分,其中三个为新成分,即短距乌碱甲(acobretine A,1),短距乌碱乙(acobretine B,2)和短距乌碱丙(acobretine C,3).另三个为已知成分:花葶乌头宁(scaconine,4),花葶乌头碱(scaconitine,5)和N-脱乙酰花葶乌头碱(N-deacetylscaconitine,6).经IR,MS,^1H NMR,^1^3C NMR测定和化学方法确定可1~3的结构 相似文献
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中国乌头的研究:XXIII, 紫草乌生物碱的研究 总被引:2,自引:0,他引:2
从云南紫草乌(Aconitum delavayi Franch)中又分得四个生物碱, 其中三个为新的二萜类生物碱, 分别命为紫草乌碱丙(delavaconitine C,3),紫草乌碱丁(delavaconitine D,5)和紫草乌碱戊(delavaconitime E,6),经乙酰 化、水解及UV、IR、MS、^1H和^1^3CNMR 的测定, 确定了它们的化学结构。另一个经鉴定为紫草乌碱甲胺醇(delavaconine, 2), 首次从植物中分离得到。 相似文献
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从吉林省抚松县采集的两色乌头(Acomitum albouiolaceum Kom.)的根,分得九种C~10二萜生物碱,其中四种为新化合物:两色乌碱甲(alboviolaconitine A)(1),两色乌碱乙(alboviolaconitine B)(2),两色乌碱丙(alboviolaconitine C)(3)和两色乌碱丁(alboviolaconitine D)(4).其余五种成分鉴定为瑟佩定(septentriodine)(5),牛扁亭(lycaconitine)(6),东乌头定(avadharidine)(7),帕巴乌碱铵(ammoniumpuberaconitine)(8)和牛扁碱 (lycotonine)(9).经分析各种光谱数据及化学方法转为已知物,确定了1-4的结构. 相似文献
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两个具有特殊骨架的C_(20)-二萜生物碱北乌灵(kusnezoline)和峨翠灵( omeieline)分别分自中国特产毛茛科植物北草乌(Aconitum hkusnezoffii Paritz)、彭州岩乌头(A. racemulosum var. pengzhouense)和峨眉翠雀花( Delphinium omeiense W. T. Wang)。应用2D NMR技术(~1H-~1H COSY, HMQC, HMBC, NOESY)全面归属了这两个生物碱的~1H和~(13)C信号的化学位移。 相似文献
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为了准确测定板栗中矿物元素和稀土元素的含量水平,采用冷冻干燥方式预处理样品,选用硝酸和过氧化氢体系微波消解样品,结合电感耦合等离子体质谱技术,建立了板栗中钠(Na)、钾(K)、镁(Mg)、锰(Mn)、铁(Fe)、钒(V)、钴(Co)等19种矿物元素及镧(La)、铈(Ce)、镨(Pr)、钕(Nd)、钐(Sm)、铕(Eu)、钆(Gd)、铽(Tb)、镝(Dy)、钬(Ho)、铒(Er)、铥(Tm)、镱(Yb)、镥(Lu)、钇(Y)等15种稀土元素的同时分析测定方法。方法检出限为0.0027~0.78μg/L,相对标准偏差为1.4%~6.3%。通过国家标准物质GBW10019苹果的准确度实验验证,测定结果均在标准证书值范围内。实验结果表明,方法适用于板栗中矿物元素及稀土元素的同时测定。 相似文献
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Summary The cation-exchange behaviour of Mn(II), Cd(II), Co(II), Ni(II), Zn(II), Cu(II), Fe(III), Sc(III), Y(III), Eu(III), Dy(III), Ho(III), Yb(III), Ti(IV) and Nb(V) in malate media at various concentrations and pH, was studied with Dowex 50 WX8 resin (200–400 mesh) in the ammonium form. Separation of Fe(III)/Cu(II), Fe(III)/Cu(II)/Zn(II), Fe(III)/Co(II)/Mn(II), Cu(II)/Ni(II)/Mn(II), Fe(III)/Cu(II)/Co(II)/Mn(II), Fe(III)/Cu(II)/Ni(II)/Cd(II), Yb(III)/Eu(III), Sc(III)/Y(III),Sc(III)/Yb(III)/Dy(III) and Nb(V)/Yb(III)/Ho(III) has been achieved, among others.This work was supported by C.N.R. of Italy. 相似文献
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A new N-fatty acyl tryptamine, cheritamine ( 30 ), along with thirty-two compounds including nineteen benzenoids, p-hydroxybenzadehyde ( 1 ), p-hydroxybenzoic acid ( 2 ), methylparabene ( 3 ), 3-chlorobenzoic acid ( 4 ), vanillin ( 5 ), isovanillin ( 6 ), vanillic acid ( 7 ), isovanillic acid ( 8 ), methyl vanillate ( 9 ), methyl isovanillate ( 10 ), syringaldehyde ( 11 ), syringic acid ( 12 ), 3,4,5-trimethoxybenzoic acid ( 13 ), trans-methyl p-coumarate ( 14 ), ferulic acid ( 15 ), p-dihydrocoumaric acid ( 16 ), 3-(4-hydroxy-3,5-dimethoxyphenyl)-1,2-propanediol ( 17 ), 3,4,5 -trimethoxyphenyl-β-D-glucopyranoside ( 18 ) and thalictoside ( 19 ); one p-quinone, 2,6-dimethoxy-p-quinone ( 20 ); one purine, uridine ( 21 ); eight alkaloids, nicotinic acid ( 22 ), thalifoline ( 23 ), doryphornine ( 24 ), (–)-norstephalagine ( 25 ), (-)-romucosine ( 26 ), (+)-pronuciferine ( 27 ), (+)-norisocorydine ( 28 ) and oxoasimilobine (29) and three steroids, β-sitosterol-D-glucoside ( 31 ), stigmasterol-D-glucoside ( 32 ) and 6′-(β-sitosteryl-3-O-β-glucopyranosidyl)hexadecanoate ( 33 ), are isolated from the stems of Annona cherimola. These compounds were characterized and identified by physical and spectral evidence. 相似文献
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Luminol-K2S2O8体系中金属离子化学发光行为的研究 总被引:1,自引:0,他引:1
报导了在自行设计的流动注射式化学发光分析仪上,对Luminal-K2S2O8体系中32种金属离子的化学发光行为的系统研究.确定了对金属离子的最优测定条件以及大多数金属离子的检出极限和线性范围. 相似文献
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Three new coumarins, yuehgesin-A (1), -B (2) and -C (3) and 22 compounds—murracarpin (4), mupanidin (5), isomeranzin (6), murralongin (7), scopoletin (10), 7-methoxy-8-(l′-ethoxy-2′-hydroxy-3′-methyl-3′-butenyl)coumarin (11), umbelliferone (12), paniculatin (13), braylin (14), auraptenol (15), meranzin hydrate (16), minumicrolin (17), scopolin (18), caffeine (19), 3,3′,4′,5,5′,6,7-heptamethoxyflavone (20), 4-hy-droxybenzaldebyde (21), p-hydroxybenzoic acid (22), cis- and trans-ferulic acid (23), cis- and transmethyl ferulate (24) and trans-ethylferulate (25)—were isolated and characterized from fresh flowers of Murraya paniculata collected in Taiwan. Their structures were elucidated by spectral methods. The chemotaxonomy of Murraya paniculata is, discussed. 相似文献
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阴行草中挥发油的分析 总被引:1,自引:0,他引:1
阴行草(SiphonostegiachinensisBenth.)系玄参科植物。全草地上部分入药,《中药志》编入刘寄奴条[1],《中药大辞典》编入钤茵陈条[2]。其药用功效和可制疗的疾病参见文献[1.2]。有关阴行草的化学组分,中国医学科学院药物研究所曾指出含挥发油、强心甙等[3],但具体组分,目前尚未见报导。本文报导了空心柱气相色谱-质谱法对阴行草挥发油的分离和鉴定结果,共鉴定了35个组分,占总油含量(按总离子流图面积归一法人工估算)的92.5%,相对含量在1%以上的16个主要组分全部鉴定。 相似文献
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Complexes of platinum(IV), ruthenium(III), rhodium(III), iridium(III), gold(III), dioxouranium(II), zinc(II), cadmium(II),
mercury(II) and manganese(II) with isonicotinic acid hydrazide were prepared and characterized on the basis of analytical,
conductometric, magnetic susceptibility and spectral data. Platinum(IV) ruthenium(III), rhodium(III), iridium(III), dioxouranium(II)
and manganese(II) form six-coordinate complexes while gold(III), zinc(II), cadmium(II) and mercury(II) form four coordinate
complexes. 相似文献
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Nineteen compounds were isolated from the CHCl3 soluble portion of the heartwood of Eucalyptus citriodora. These compounds included trans‐calamenene (1), T‐muurolol (2), α‐cadinol (3), 2β‐hydroxy‐α‐cadinol (4), 4‐hydroxy‐3,5‐dimethoxybenzaldehyde (5), 4‐hydroxy‐3,5‐dimethoxybenzoic acid (6), linoleic acid (7), squalene (8), α‐tocopherol (9), erythrodiol (10), morolic acid (11), betulonic acid (12), cycloeucalenol (13), cycloeucalenol vernolitate (14), β‐sitosterol (15), β‐sitosteryl‐β‐D‐glucopyranoside (16), β‐sitostenone (17), yangambin (18), sesamin (19). Among them, 14 is a new compound. The structures of these compounds were elucidated on the basis of spectroscopic evidence. 相似文献
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Two new alkaloids, glaucenamide ( 1 ) and fissiceine ( 2 ), along with fifteen known ones, liriodenine ( 3 ), oxocrebanine ( 4 ), kuafumine ( 5 ), oxoxylopine ( 6 ), atherospermidine ( 7 ), (‐)‐xylopine ( 8 ), (‐)‐N‐acetylxylopine ( 9 ), N‐trans‐feruloyltyramine ( 10 ), aristololactam BII ( 11 ), aristololactam BIII ( 12 ), aristololactam AII ( 13 ), piperolactam A ( 14 ), goniothalactam ( 15 ), norcepharadion B ( 16 ), and noraristolodione ( 17 ) were isolated from the methanolic extracts of the Fissistigma glaucescens. The structures of these compounds were established by means of spectral analysis. 相似文献
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Adsorption of microgram amounts of 20 metal species on activated carbon powder from aqueous solutions of pH 1-13 was investigated. The species examined were Cs(I), Y(III), Ce(III), Ti(IV), Zr(IV), Cr(III), Cr(VI), Mn(II), Fe(III), Co(II), Ni(II), Ru(III), Cu(II), Ag(I), Zn(II), Cd(II), Al(III), Pb(II), Sb(III) and Bi(III). 相似文献