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Nineteen flavonoids were isolated from Artemisia ludoviciana var. ludoviciana, including a new 2′- hydroxy- 6-methoxyflavone, 5,7,2′,4′-tetrahydroxy-6,5′-dimethoxyflavone. The known compounds include quercetagetin 3,6,3′,4′-tetramethyl ether, eupatilin, 5,7-dihydroxy-3,6,8,4′-tetramethoxyflavone, luteolin 3′,4′-dimethyl ether, jaceosidin, 5,7,4′-trihydroxy-3,6-dimethoxyflavone, tricin, hispidulin, chrysoeriol, kaempferol 3-methyl ether, apigenin, axillarin, eupafolin, selagin and luteolin together with three flavones which were previously isolated for the first time from Artemisia frigida: 5,7,4′-trihydroxy-6, 3′,5′-trimethoxyflavone, 5,7,3′-trihydroxy-6,4′,5′-trimethoxyflavone and 5,7,3′,4′-tetrahydroxy-6,5′- dimethoxyflavone. 相似文献
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Bioassay guided fractionation and chemical investigation of the ethanolic extract of the aerial parts of Dodonaea viscosa Linn. from Egypt, resulted in the isolation and identification of three new compounds, including two new clerodane diterpenoids 1 and 2 and a new myo-inositol derivative 3, along with nine known compounds 4–12. The structures of the isolated compounds were elucidated using 1D and 2D NMR experiments, HRESIMS, and comparison with literature data. All isolated compounds were evaluated for their antibacterial, antifungal, antimalarial as well as antileishmanial activities. Compound 5 exhibited good antifungal activity against Cryptococcus neoformans with an IC50 value of 6.11 μg/ml. Compounds 10 and 12 showed moderate antileishmanial activity against Leishmania donovani with IC50 values of 16.6 and 19.06 μg/ml, respectively. 相似文献
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Matteo Adinolfi Gaspare Barone Rosa Lanzetta Guglielmo Laonigro Lorenzo Mangoni Michelangelo Parrilli 《Phytochemistry》1985,24(3):624-626
Three novel 3-benzyl-4-chromanones have been isolated from the bulbs of Muscari comosum. 相似文献
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Antônio A. Lins Mesquita Wanderley Gonçlves De Oliveira Rosa M. Taveira Neiva Otto R. Gottlieb 《Phytochemistry》1975,14(3):803-806
The wood of Tovomita pyrifolium (Guttiferae) contains the novel tovopyrifolins A [1,6-dihydroxy-7-methoxy-5-prenyl-6′,6′-dimethylpyrano (2′,3′:3,2)xanthone], B (1,5-dihydroxy-3,4-dimethoxyxanthone) and C (1,3,5-trihydroxy-2-methoxyxanthone) and also the known tovophyllins A and B [structure revised to 1,6-dihydroxy-5-prenyl-6′, 6′-dimethylpyrano(2′,3′:3,2)-6″,6″-dimethylpyrano(2″,3″:7,8)xanthone]. 相似文献
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Tian-Shung Wu 《Phytochemistry》1981,20(1):178-179
A new coumarin, omphamurin, isolated from the n-hexane extract of the leaves of Murraya omphalocarpa, was characterized as 5,7-dimethoxy-8-(2′-hydroxy-3′-methyl-3′-butenyl) coumarin by chemical evidence and spectral data. 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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Raimundo Braz F-.O Gentil Pedreira Otto R. Gottlieb José G.S. Maia 《Phytochemistry》1976,15(6):1029-1030
The Myristicaceae must be added to the small number of families which contain isoflavonoids; the previously unknown 5,7,2′-trihydroxy-4′-methoxyisoflavone and 5,7-dihydroxy-2′,4′-dimethoxyisoflavone having been found to co-occur with biochanin A in Virola caducifolia W. Rodr. 相似文献
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2′,4′-Dihydroxychalcone, 4′-hydroxy-2′-methoxychalcone and 2′,4′-dihydroxy-3′-methoxychalcone were isolated and characterized from the resinous exudate produced by Acacia neovernicosa. Smaller amounts of isoliquiritigenin, pinocembrin and chrysin were also found and identified by their chromatographic properties and UV spectra. The material of one collection contained galangin, 3-methylkaempferol and 3,3′ -dimethylquercetin. 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