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Seven alkaloids were isolated from Cephalotaxus sinensis (Rehd. et Wils.) Li and were identified by elements analysis, melting point and spectral data. Six of them are known alkaloids: cephalotaxine (Ⅰ), Ⅱ-hydroxyeephalotaxine (Ⅱ), drupaeine (Ⅲ), demethylcephalotaxinone (Ⅳ), c-3epi-witsonine (Ⅴ) and wilsonine (Ⅵ). Cephalo- taxine is the major alkaloid of this plant. (Ⅰ–Ⅳ) are alkaloid of Cephalotaxus type and another two (Ⅴ–Ⅵ) are alkaloid of homoerythrina type. (Ⅶ) seems to be a new alkaloid. Its strueture will be studied further. 相似文献
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From the root of Aconitum pseudogeniculatum W. T. Wang, collected from the west of Sichuan province, six diterpenoid alkaloids were isolated and identified as denudatine ( Ⅰ ), chasmanine ( Ⅱ ), talatisamine (Ⅲ), yunaconitine (Ⅳ), crassicauline Ⅰ (Ⅴ) and vilmorrinianine C (Ⅵ). Yunaconitine, the major alkaloid of the plant, and its chemically transformed products pseudaconine and tetraacetylpseudaconine, showed antiinflammatory activities. 相似文献
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Eight alkaloids have been isolated from the roots of Stephania lincangensis H. S. Lo. et M. Yang which is a novel species growing in Lincang district of Yunnan province. The structures of these compounds were identified as 1-tetrahydropalmatine (Ⅰ), capaurine (Ⅱ) isocorydine (Ⅲ), corydine (Ⅳ), roemerine (Ⅴ) and palmatine (Ⅵ) by means of spectral and chemical methods. Two others, namely lincangenine [4-hydroxy-2,3,9,10-pentamethoxyprotoberberine (Ⅶ)] and l-l,2,3,9,10-pentamethoxytetrahydroprotoberberine (Ⅷ), are new alkaloids, l-tetrahydropalmatine is the main alkaloid with 2.39% yield. 相似文献
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李运昌 《植物分类与资源学报》1982,4(4):1-3
本文是针对大花嵩草组的等级问题,选用了本类群和相关类群资料;应用经典植物分类学的比较方法和数字分类学的信息系统分类,相似性相关系统分类和相似性距离系统分类的方法进行研究的结。数宇分类的树系和和经典形态分类的比较表反映出它不同于蒿草属,虽然它较接近苔草属和扁穗苔属,但它们的形态性状是不相同的,所以把它作为属的等级更加合适;同时我们也同意伊万诺娃的观点。 相似文献
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The alcoholic extract of the rhizome of Albertisia laurefolia has been shown to possess antitumor activity. Seven alkaloids were isolated from the alkaloidal fraction of this plant. They were identified as aromoline(Ⅰ), daphnoline(Ⅱ), cocsuline (Ⅲ), cocsoline(Ⅴ), apateline(Ⅵ), and N-methylapateline(Ⅶ). The struture determination of alkaloid Ⅳ is hampered at present by lack of material. 相似文献
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Ten known alkaloids, sinoacutine (Ⅰ), 1-tetrahydropalmatine (Ⅱ), d-stepharine (Ⅲ), 1- stepholidine (Ⅳ), 1-corydalmine (Ⅴ), stephanine (Ⅵ), palmatine (Ⅶ), dehydrocorydalmine (Ⅷ), stepharanine (Ⅸ) and roemerine (Ⅹ) were isolated from the roots of Stephamia yunnanensis H. S. Lo. Their structures were determined from spectral data and chemical evidence. 相似文献
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Eight alkaloids had been isolated from the roots of Stephania rnacrantha H. S. Lo et M. Yang which is
a novel species growing in Yang-bi district of Yunnan Province. The structures of these compounds were
identified as l-tetrahydropalmatine ( Ⅰ ), isocorydine ( Ⅱ ), corydine ( Ⅲ ), corydalmine (Ⅳ),
stepholidine ( Ⅴ ), palmatine ( Ⅵ ), corytuberine salt (Ⅶ) and laudanidine (Ⅷ) by means of spectral and
chemical methods. Isocorydine is a main alkaloid with 1.82% yield. It is interested that laudanidine is found
for the first time in the plants of Menispermaceae. 相似文献
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Four diterpenoid alkaloids were isolated by means of column chromatography and preparative HPLC from the roots of Aconitum leucostomum Worosch. Their structures were determined from the spectral data. One of them was found to be a new compound named leucostine ( Ⅱ ). The other three are known alkaloids, leuconine ( Ⅰ ), dehydroacosanine ( Ⅲ ) and sepaconitine (IV). 相似文献
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Eleven alkaloids were isolated from roots of Stephania succifera Lo et Tsoong. They were identified as crebanine (Ⅰ), tetrahydropalmatine (Ⅱ), dehydrocrebanine (Ⅲ), palmatine (Ⅳ). dehydrocorydalmine (Ⅴ), crebanine nitrate (Ⅵ), oxocrebanine (Ⅶ), corydalmine (Ⅷ), phanostenine (Ⅸ), discretamine (Ⅹ) and corypalmine (Ⅺ) by means of TLC. UV, NMR MS spectral analyses and the fact that no depression of MP. with authentic samples was observed. Compounds Ⅳ, Ⅴ, Ⅵ, Ⅶ, Ⅸ, Ⅹ and Ⅺ were first reported from this plant. 相似文献
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Seven crystalline compounds have been isolated from the female inflorescences of Typha angustata Bory et Chaub. They were identified as vanillic acid (Ⅰ), E-p-hydroxy- cinnamic acid (Ⅱ), Protocatechuic acid (Ⅲ), E-Pro-penoic acid-3- (4-hydroxyphenyl)- 2,3-dihydrohypropyl ester (Ⅳ), Succinic acid (Ⅴ), p-hydroxybenzaldehyde (Ⅵ) and D-mannitol (Ⅶ). (Ⅳ) is a new compound. (Ⅰ), (Ⅱ), (Ⅲ) and (Ⅶ) were attained for the first time from Typhaceae. 相似文献
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Sarcococca vagans Stapf (Buxaceae) was distributed in Southern Yunnan, China. From the plant collected in Xishuangbanna,three new steroidal alkaloids named vaganines A,B and C( Ⅰ–Ⅲ )together with three known compounds were isolated and on the basis of spectral analyses and chemical evidence, the chemical structures of three new compounds were determined as 20α-dimethylamino-4β-acetoxyl-3β-senecioylamino-5α-pregnane (Ⅰ), 20α-dimethylamino-4β hydroxyl- 3-senecioylamino-△2(3)-pregnaene (Ⅱ), acetate of Ⅱ (Ⅲ); respectively. 相似文献
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Six steroid alkaloids, imperialine (Ⅰ), imperialine-3β-D-glucoside (Ⅱ), peimissine (Ⅲ), imperialine N-oxide (Ⅳ), cycloparnine (Ⅴ), and cycloposine (Ⅵ) were isolated from the bulbs of Fritillaria pallidiflora Schrenk. Their structures were determined from spectral data and chemical evidences. Imperialine N-oxide was first obtained from nature. 相似文献
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Seven diterpenoid alkaloids were isolated from the aerial parts of Delphinium grandiflorum L., including six known ones as anhweidelphinine (Ⅰ), 14-dehydrodelcosine (Ⅱ), delsoline (Ⅲ), methyllycaconitine (Ⅳ), lycoctonine (Ⅴ) and delphatine (Ⅵ). The compound Ⅶ, which is now referred to as grandiflorine, is a new alkaloid and its structure was determined by means of spectral analysis and chemical transformation as well. 相似文献
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Seven diterpenoid alkaloids were isolated from Aconitum vilmorinianum var. patentipilum W. T. Wang. Their structures were determined as franchetine(Ⅰ), indaconitine(Ⅱ), yunaconitine(Ⅲ), talatisamine(Ⅳ), chasmaconitine(Ⅴ), crassicauline A (Ⅵ), and bikhaconine(Ⅶ). Last one has not been previously found in nature. 相似文献
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杜鹃是人们所熟知的高山花卉,以它丰富的种类、独特的景观、优美的姿态和艳丽的花朵吸引着不少分类学家、生态学家和园艺学家对它们进行了广泛的研究和引种。我们在编写西藏植物志和云南植物志的基础上,试图就该属植物的地理分布及其起源问题进行初步的探讨。 相似文献
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Five compounds were isolated from the bark of Taxus yunnanensis Cheng et L. K. Fu. Based on spectral IR, MS, 1H-NMR, 13C-NMR and physico-chemical constant analysis, they were identified as 7-epi-taxol B ( Ⅰ ), 1, 13-diacetoxy-10-deacetyl baccatin Ⅲ (Ⅱ ), taxol C-7-xylose (Ⅲ), taxol (Ⅳ), 3-epi-ursolic acid (Ⅴ). Compounds Ⅰ and Ⅱ were newly identified. 相似文献