排序方式: 共有7条查询结果,搜索用时 31 毫秒
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Takeda Y Isai N Masuda T Honda G Takaishi Y Ito M Otsuka H Ashurmetov OA Khodzhimatov OK 《Chemical & pharmaceutical bulletin》2001,49(8):1039-1041
From the aerial parts of Phlomis spinidens, two new flavonol bisglycosides, phlomisflavosides A (1) and B (2), were isolated together with the known compounds, astragalin, isoquercitrin, lamiridoside, phlomoside A, shanzhiside methyl ester, 8-O-acetylshanzhiside methyl ester, phlorigidoside C, rodioloside (=salidroside), forsythoside B, citroside A and lariciresinol-4'-O-beta-D-glucoside. The structures of the new compounds were elucidated based on spectral and chemical evidence. 相似文献
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Nahoko Uchiyama Fumiyuki Kiuchi Gisho Honda Yoshio Takeda Ozodbek A. Ashurmetov 《Tetrahedron》2006,62(18):4355-4359
Trypanocidal constituents of Dracocephalum komarovi were investigated. Under guidance of the in vitro trypanocidal activity against epimastigotes of Trypanosoma cruzi, the causative agent of Chagas' disease, two new diterpenes, dracocequinones A (1) and B (2), and two known triterpene acids, ursonic acid and ursolic acid, were isolated as trypanocidal constituents, in addition to previously reported diterpenes, cyclocoulterone (4), komaroviquinone (5), dracocephalone A (6) and komarovispirone (7). Furthermore a new diterpene, komarovinone A (3), was isolated, together with four known terpenes. Among these compounds, komaroviquinone (5) showed the most potent activity with minimum lethal concentration of 0.4 μM. Structure elucidation of the new diterpenes 1-3 was described. 相似文献
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Hayashi H Hattori S Inoue K Khodzhimatov O Ashurmetov O Ito M Honda G 《Chemical & pharmaceutical bulletin》2003,51(11):1338-1340
The chemical characteristics of Glycyrrhiza glabra L. were investigated at a habitat in Uzbekistan. HPLC analysis of the underground parts indicated that glycyrrhizin contents varied from 3.3 to 6.1% of dry weight, and that glabridin, a species-specific flavonoid for G. glabra, was detected in all underground samples (0.08-0.35% of dry weight). HPLC analysis of the leaves indicated that G. glabra plants collected in the present study could be divided into two types, RT-type and IQ-type, according to their major flavonol glycosides, rutin or isoquercitrin, respectively. 相似文献
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Y Shikishima Y Takaishi G Honda M Ito Y Takfda O K Kodzhimatov O Ashurmetov K H Lee 《Chemical & pharmaceutical bulletin》2001,49(7):877-880
The methanol extract of the dried aerial parts of Prangos tschimganica gave three new coumarin derivatives and 30 known coumarin derivatives. Their structures were established on the basis of chemical and spectroscopic evidence. Absolute configuration of the isolated compounds were determined by using a modified Mosher's method. Some of the isolated compounds showed anti-HIV activity. 相似文献
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Su BN Takaishi Y Tori M Takaoka S Honda G Itoh M Takeda Y Kodzhimatov OK Ashurmetov O 《Organic letters》2000,2(4):493-496
[structure: see text] Two novel sesquiterpene and monoterpene dimers, macrophyllols A (1) and B (2), were isolated from the bark of Inula macrophylla. Their structures were determined on the basis of spectral evidence (especially HREIMS and 2D NMR) as well as chemical transformation. The structure of macrophyllol A (1) was confirmed by X-ray analysis. The possible biosynthetic pathways of macrophyllols A (1) and B (2) are discussed. 相似文献
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Nahoko Uchiyama Fumiyuki Kiuchi Yoshio Takeda Ozodbek A. Ashurmetov 《Tetrahedron letters》2004,45(3):531-533
A new diterpene, komarovispirone (1) with a spiro-octahydroindene skeleton, was isolated from Dracocephalum komarovi. The structure was elucidated by extensive analyses of spectral data. Komarovispirone (1) showed trypanocidal activity against epimastigote of Trypanosoma cruzi, the causative agent of American trypanosomiasis, with a minimum lethal concentration of 23 μM. 相似文献
7.
B Chen Y Takaishi K Kawazoe K Tamemoto G Honda M Ito Y Takeda O K Kodzhimatov O Ashurmetov 《Chemical & pharmaceutical bulletin》2001,49(6):707-710
Four new farnesyl hydroxybenzoic acid derivatives, kuhistanols E-H (1-4), were isolated from the roots of the Uzbekistan medicinal plant Ferula kuhistanica. The structures of the new compounds were elucidated based on spectroscopic and chemical evidence. 相似文献
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