共查询到20条相似文献,搜索用时 0 毫秒
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P.C. Coleman D.J.J. Potgieter C.H.Van Aswegen N.M.J. Vermeulent 《Phytochemistry》1984,23(5):1202-1203
Chromatographic separation of the ethanol extract of Geigeria burkei resulted in the isolation and characterization of two known flavonoids, 5,7,3′,4′-tetrahydroxy-6-methoxyflavone and 5,7,4'-trihydroxy-6 methoxyflavone. 13CNMR data, as well as the respiratory inhibition and uncoupling of oxidative phosphorylation, is reported for the first time. 相似文献
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Margaret F. Roberts Barbara N. Timmermann Tom J. Mabry Richard Brown Stephen A. Matlin 《Phytochemistry》1984,23(1):163-165
A new highly oxygenated flavone methyl ether has been isolated from Brickellia veronicaefolia and B. chlorolepis. It has been identified as 5,6′-dihydroxy-6,7,2′,3′,4′-pentamethoxyflavone and given the name brickellin. 相似文献
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Werner Herz Seringolam V. Govindan Ingrid Riess-Maurer B. Kreil Hildebert Wagner Lorand Farkas Janos Strelisky 《Phytochemistry》1980,19(4):669-672
Two new flavones, 3′,4′-methylenedioxy-5,6,7,8,5′-pentamethoxyflavone and 5,7,4′-trihydroxy-6,3′,5′-trimethoxyflavone, have been isolated from Conoclinium coelestinum. Final structure proof was accomplished by synthesis. 相似文献
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T.J. Mabry 《Phytochemistry》1981,20(2):309-311
Two new highly oxygenated flavones were isolated from Artemisia frigida. Their structures were determined by spectroscopic methods as 5,7,4′-trihydroxy-6,3′,5′-trimethoxyflavone and 5,7,3′-trihydroxy-6,4′,5′-trimethoxyflavone. 相似文献
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Separation of the ethanolic extract of the fruit of Murraya omphalocarpa afforded a new flavonol, murrayanol, which was characterized as 5,4′-dihydroxy-3,6,7,3′,5′-pentamethoxyflavone, together with the known substances coumurrayin, mexoticin, 3,5,6,7,3′,4′,5′-heptamethoxyflavone, 5,7-dimethoxy-8-(3′-methyl-2′-oxobutyl) coumarin and sitosterol. 相似文献
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Leovigildo Quijano José S. Calderón Federico Gómez G Edgar Escobar Tirso Rios 《Phytochemistry》1985,24(5):1085-1088
Two new highly oxygenated flavones, were isolated from aerial parts of Ageratum houstonianum. Their structures were established as 3′-hydroxy-5,6,7,8,2′,4′,5′-heptamethoxyflavone and 5,3′-dihydroxy-6,7,8,2′,4′,5′-hexamethoxyflavone on the basis of spectral data and chemical degradation. The structure of the latter compound was confirmed by X-ray analysis. 相似文献
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Chloroform extraction of Eupatorium leucolepis gave the new flavones 3′-hydroxy-5,6,7,8,4′,5′-hexamethoxyflavone, 4′-hydroxy-5,6,7,8,3′,5 相似文献
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Six 2′-hydroxyflavonols were isolated from Gutierrezia microcephala, including four new compounds, 5,7,2′-trihydroxy-3,6,4′,5′-tetramethoxyflavone, 5,7,2′-trihydroxy-3,6,8,4′,5′-pentamethoxyflavone, 5,2′-dihydroxy-3,6,7,8,4′,5′-hexamethoxyflavone and 5,7,2′,4′-tetrahydroxy-3,8,5′-trimethxoyflavone and two known compounds, 5,7,2′,5′-tetrahydroxy-3,6,8,4′-tetramethoxyflavone and 5,7,2′,4′-tetrahydroxy-3,6,8,5′-tetramethoxyflavone. 相似文献
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Luis A. Loyola 《Phytochemistry》1985,24(8):1871-1872
A new flavone has been isolated from Parastrephia quadrangularis and identified as 5,7-dihydroxy-3,8,3′,4′-tetramethoxyflavone. 相似文献
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Whole plants of Poa huecu have yielded a new flavone characterized as 5,7,3′-trihydroxy-4′,5′-dimethoxyflavone as well as tricin, selagin, umbelliferone and scopoletin. 相似文献
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From the aerial parts of Artemisia mesatlantica, a new highly methoxylated flavone was isolated. Its structure was determined by spectroscopic methods as 5,4′-dihydroxy-6,7,3′,5′-tetramethoxyflavone. 相似文献
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E. Ayanoglu A. Ulubelen W.D. Clark G.K. Brown R.R. Kerr T.J. Mabry 《Phytochemistry》1981,20(7):1715-1717
Nine flavonoids including two new myricetin derivatives, myricetin 3′,4′-dimethyl ether and myricetin 3,3′, 4′-trimethyl ether, were obtained from Haplopappus integerrimus var. punctatus. The known compounds are quercetin 7,3′-dimethyl ether, querectin 3,3′-dimethyl ether, isorhamnetin, quercetin 3,7-dimethyl ether, quercetin 3-methyl ether, quercetin and quercetin 3-β-d-glucoside. 相似文献
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From the leaves of Myrica gale 2′,4′-dihydroxy-6′-methoxy-3′,5′-dimethylchalcone has been isolated. The fruits yielded 2′-hydroxy-4′,6′-dimethoxy-3′-methyldihydrochalcone. The constitutions were deduced from spectroscopic data and confirmed by synthesis. 相似文献
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Two dihydrochalcones, 2′,6′-dihydroxy-4′-methoxydihydrochalcone and 2,4′,6′-trihydroxydihydrochalcone have been isolated from leaves of Lindera umbellata. 相似文献