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22.
滇姜花抗肿瘤活性二萜及其光敏氧化反应的研究 总被引:5,自引:0,他引:5
从滇姜花(HedychiumyunnanenseGagnep.)根茎中分离到两个具抗肿瘤活性的二萜成分滇姜花素C及滇姜花素A,前者为新化合物,其结构经波谱及化学方法鉴定。此新化合物亦可从滇姜花素A的光敏氧化反应产物中分离得到。 相似文献
23.
One new diterpenoid named albopilosin A has been isolated from the dry stems and leaves of lsodon albopilosus. Its structure was determined as 7α, 12α, 14β-trihydroxy-18-acetoxyent-kaur-16-en-15-one by means of spectral analysis combined with preparation of derivatives. 相似文献
24.
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
25.
Deng Fu-xiao Huang Shou- qing Cao Jian-hong Xia Zhi-lin Lin Sui Zhu Da-yuon Jiang Shan-hao Zhu Yuan-long 《植物学报(英文版)》1985,27(5)
This paper deals with the isolation of three new diterpenes: triptono-terpene, triptonoterpene methyl ether and triptolidenol from Tripterygium wilfordiiHook. F. Their structures are assigned as Ⅰ, Ⅱ, and Ⅲ, respectively by means of spectors-copic analyses (UV, IR, 1HNMR and MS), preparation of the derivative and chemicaltransformations. 相似文献
26.
From the leaves of Rabdosia coetsa (Buch.-Ham. ex D. Don) Ham, a new kauranoic acid, coetsanoic acid, along with eight known compounds, dihydrorabdoktmmin C, rabdoktmmin C, albopilosin A, maerocalyxin C, N-2'-hydroxy-eieosanoyl ( henicosanoyl-hexacosanoyl )-4-hydroxy- trans-8-sphingenine,ursolic acid, 2a, 3β-dihydroxyursolie acid and daucosterol has been isolated. Its structure was established as 7a, 12a, 14β-tri-hydroxy-15-oxo-ent-kauran-18-carboxy acid by spectroscopic means. The ceramides were isolated from the plants of Rabdosia for the first time. 相似文献
27.
Phytochemical investigation of the ethyl acetate extract of the aerial parts of Elytropappus rhinocerotis (L.f.) Less. led to the isolation of a coumarin (1), four flavonoids (2–5), and four labdane diterpenes (6–9). The structural characterization of the isolated compounds was based on spectroscopic data. All compounds are reported for the first time from this species and from the genus Elytropappus Cass. The isolation of labdane diterpenes and methoxylated flavones is of taxonomical significance. 相似文献
28.
《Bioorganic & medicinal chemistry letters》2014,24(15):3326-3328
Podoimbricatin A (1), a diterpenoid possessing an unprecedented 6/6/5/6-fused tetracyclic ring system, and podoimbricatin B (2), a new abietane-type diterpenoid, together with four previously reported diterpenoids and a cyclic peptide were isolated from the twigs and leaves of Podocarpus imbricatus. Their structures were established on the basis of extensive spectroscopic analyses and the relative configuration of 1 was confirmed by single-crystal X-ray diffraction analysis. A plausible biogenetic pathway involving hetero-Diels–Alder cycloaddition as a key reaction is proposed for 1. Compounds 1, 5, and 7 showed inhibitory effects against the A549 and NCI-H292 cancer cell lines. 相似文献
29.
30.
多根乌头生物碱成分的研究 总被引:2,自引:0,他引:2
从新疆产多根乌头AconitumkarakolicumRap.块根中分得五个二萜生物碱,经理化常数测定和光谱分析,分别鉴定为:乌头碱、脱氧乌头碱、新乌碱、准噶尔乌头碱和12-表-欧乌碱。其中12-表-欧乌碱系首次从该植物中获得。 相似文献