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1.
Zhigang Tai Fengmei Zhang Le Cai Jie Shi Qiue Cao Zhongtao Ding 《Chemistry of Natural Compounds》2012,48(2):221-224
A new flavonol glycoside and four known flavonol glycosides were isolated from the whole plant of Pseudodrynaria coronans. By means of spectroscopic analysis, their structures were established as kaempferol3-O-(6' -O-feruloyl-4' -O-acetyl)-β-D-glucopyranoside (1), kaempferol-3-O-(6' -O-feruloyl)-β-Dglucopyranoside (2), kaempferol-3-O-(6' -O-acetyl)-β-D-glucopyranoside (3), astragalin (4), and isoquercitrin (5). The DPPH radical scavenging activities of these compounds were also assayed. 相似文献
2.
Three kaempferol glycosides were isolated from the flower buds of Panax quinquefolium L. together with kaempferol (1). By means of chemical and spectroscopic methods (NMR, ESI-MS, 2D NMR), their structures were established as trifolin (2), panasenoside (3), and kaempferol-3-O-β-D-glucosyl(1→2)-β-D-galactoside-7-O-α-L-rhamnoside (4).Compound 4 is a new compound. 相似文献
3.
Ge Zhang Mei-Li Guo Run-Ping Li Ying Li Han-Ming Zhang Zhong-Wu Su 《Chemistry of Natural Compounds》2009,45(3):398-401
A novel compound, 4-{1′-hydroxy-1′-mercapto-1′-[1′′-2′′(N→O)-isoquinolyl]}yl-1-benzoic acid (1), together with six known compounds, 6-hydroxykaempferol-3-O-β-D-glucopyranoside (2), rutin (3), quercetin-3-O-β-D-glucopyranoside (4), kaempferol-3-O-β-D-glucopyranoside (5), cartormin (6), hydroxysafflor yellow A (7), were isolated by chromatography from the n-BuOH fraction of 50% ethanol extraction of Flos carthami. Their structures were
elucidated on the basis of spectral analysis and comparison with published data. Among them, compound 1 was shown to possess a weak protective effect against cerebral ischemic damage in rats.
Published in Khimiya Prirodnykh Soedinenii, No. 3, pp. 339–341, May–June, 2009. 相似文献
4.
In the course of phytochemical investigations of Melia azedarach leaves, a novel cinnamoyl glycoside, cinnamoyl-1-α-L-rhamnoside (1), and a novel acylated quercetin triglycoside, quercetin-3-O-[rhamnosyl 1→6(4″-lactoyl glucoside)]-4′-O-glucoside (2), have been isolated and characterized on the basis of spectroscopic methods, together with the six known flavonoid compounds
kaempferol-3-O-rutinoside, 3-O-rhamnoside, quercetin-3-O-rutinoside, 3-O-rhamnoside, and the aglycones quercetin and kaempferol. All isolated compounds have been evaluated for their structures by
chromatographic methods, chemical degradation, and UV and NMR spectroscopy. The antioxidant activity of the extract was studied
as well.
Published in Khimiya Prirodnykh Soedinenii, No. 1, pp. 12–14, January–February, 2008. 相似文献
5.
Phytochemistry of genus Gentiana XXI: The cinnamoyl-C-glucosylflavones and their O-glucosides in Gentiana punctata L . Three new ( 1 – 3 ) and three previously identified ( 4 – 6 ) cinnamoyl-C-glucosyl-flavones have been isolated from the leaves of Gentiana punctata L . The structures of the new compounds were established as: trans-cafeoyl-2″-iso-orientin-4′-O-β-D -glucoside ( 1 ), trans-feruloyl-2″-isovitexin-4′-O-β-D -glucoside ( 2 ) and trans-feruloyl-2″-isovitexin ( 3 ). Isoscoparine ( 8 ) and O-β-D -glucosyl-2″-iso-orientin ( 7 ) were also isolated and identified. 相似文献
6.
Li-Min Dai Jian Tang Hui-Liang Li Yun-Heng Shen Cai-Yun Peng Wei-Dong Zhang 《Chemistry of Natural Compounds》2009,45(3):325-329
A new stilbene glycoside, 5-methylresveratrol-3,4′-O-β-D-diglucopyranoside (1), was isolated from the n-butanol fraction of the rhizomes of Veratrum dahuricum, together with five known stilbenoids: resveratrol-3-O-β-D-glycoside (2), 4′-methylresveratrol-3-O-β-D-glycoside (3), oxyresveratrol-4′-O-β-D-glycoside (4), oxyresveratrol-3-O-β-D-glycoside (5), and oxyresveratrol-3,4′-O-β-D-diglycoside (6), and found for the first time in the investigated plant. The structures of six isolates were identified on the basis of
1D and 2D NMR data. Compounds 1–6 showed platelet aggregation inhibition, and compound 1 had an IC50 value of 383.6 μM against platelet aggregation induced by AA.
Published in Khimiya Prirodnykh Soedinenii, No. 3, pp. 279–282, May–June, 2009. 相似文献
7.
W. L. Ma C. Y. Yan J. H. Zhu G. Y. Duan R. M. Yu 《Applied biochemistry and biotechnology》2010,160(5):1301-1308
Two aromatic substrates, paeonol (1) and emodin (2), were biotransformed by using transgenic crown galls of Panax quinquefolium. Four biotransformed products (3–6) were isolated and identified by physicochemical and spectral methods. A β-glucoside (3, 73.2% of biotransformation yield) and a 1-(2,4-dimethoxyphenyl)- ethanone (4, 8.03%) were isolated from the suspension cultures after 7-day incubation of substrate 1. Upon administration of substrate 2, another β-glucoside [emodin-6-O-β-d-glucopyranoside (5), 19.2%] and a hydroxylated derivative, citreorosein (6, 54.6%), were also obtained. The results demonstrate that transgenic crown galls of P. quinquefolium have the capacities to catalyze glycosylation, hydroxylation, and methylation reactions in the plant cells on those aromatic
compounds. 相似文献
8.
Five ellagic acid glycosides were isolated from Aphananthe aspera and their structures were identified as 3-O-methylellagic acid-4′-O-α-L-rhamnopyranoside (1), 3-O-methylellagic acid-4′-O-β-D-xylopyranoside (2), 3,3′-di-O-methylellagic acid-4′-O-β-D-xylopyranoside (3), 3,3′, 4-tri-O-methylellagic acid-4′-O-β-D-glucopyranoside (4), and 3,3′-di-O-methylellagic acid-4′-O-α-L-rhamnopyranoside (5) on the basis of spectroscopic analysis. Compound 1 is new, and all the compounds were isolated for the first time from the title plant.
Published in Khimiya Prirodnykh Soedinenii, No. 5, pp. 458–459, September–October, 2007. 相似文献
9.
A new cerebrogalactoside, Juglans cerebroside A (1), together with five known compounds, quercetin-3-O-β-D-galactopyranoside (2), myricetin-3-O-β-D-galactopyranoside (3), 2″E-quercetin-3-O-β-D-(6″″-O-[3″(4′″-hydroxyphenyl) propylene acyl]) glucopyranoside (4), gallic acid (5), and 2-methyl-1-hexadecanol (6) were isolated from the leaves of Juglans mandshurica Maxim. The structures of these compounds were determined by 1D, 2D
NMR, and MS techniques. 相似文献
10.
Wen-Juan Liang Qing-Yun Ma He-Zhong Jiang Jun Zhou Jie Pang You-Xing Zhao 《Chemistry of Natural Compounds》2012,47(6):935-939
A new oleane-type triterpene oligoglycoside, hederagenin 3-O-(3-O-acetyl-β-D-xylopyranosyl)-(1→3)-α-L-arabinopyranoside (2), together with four known compounds, hederagenin (1), hederagenin 3-O-(4-O-acetyl-α-L-arabinopyranosyl)-(1→3)-α-L-rhamnopyranosyl-(1→2)-α-L-arabinopyranoside (3), hederagenin 3-O-α-L-arabinopyranosyl-(1→3)-α-L-rhamnopyranosyl-(1→2)-α-L-arabinopyranoside (4), hederagenin 3-O-β-D-glucopyranosyl-(1→3)-α-L-rhamnopyranosyl-(1→4)-β-D-xylopyranoside (5), was isolated from the hull of Nephelium lappaceum. All the isolates were obtained from the hull of rambutan for the first time. 相似文献
11.
Identification of a new flavone glycoside from <Emphasis Type="Italic">Codonopsis nervosa</Emphasis>
Xian-li Zhou Qiang Fan Shuai Huang Cui-juan Wang You-song Wang 《Chemistry of Natural Compounds》2012,47(6):888-890
A new flavone glycoside, luteolin 7-O-[(6″′-caffeoyl)-β-D-glucopyranosyl-(1 → 6)]-β-D-glucopyranoside (1), was isolated from Codonopsis nervosa, along with three other known compounds, luteolin 7-O-β-D-glucopyranoside (2), luteolin 7-O-gentiobioside (3), and tangshenoside VI (4). Their structures were determined on the basis of 1D and 2D NMR, IR, and HR-ESI-MS. 相似文献
12.
Ellagic acid derivatives from the stem bark of <Emphasis Type="Italic">Dipentodon sinicus</Emphasis>
Ellagic acid derivatives were isolated from Dipentodon sinicus and their structures were identified as 3,3′,4′-tri-O-methylellagic acid (1), 3,3′-di-O-methylellagic acid (2), 4,4′-di-O-methylellagic acid (3), 3,3′-di-O-methylellagic acid-4′-O-α-L-rhamnopyranoside (4), 3,3′,4′-tri-O-methylellagic acid-4′-O-β-D-glucopyranoside (5), 3,3′-di-O-methylellagic acid-4′-O-β-D-glucopyranoside (6), and ellagic acid (7). All the compounds were isolated for the first time from the title plant.
Published in Khimiya Prirodnykh Soedinenii, No. 2, pp. 106–107, March–April, 2007. 相似文献
13.
A new flavone diglucoside named 7,3′-dihydroxy-4′-methoxyflavone-5-O-β-D-glucopyranosyl (6″ → 1‴)-β-D-glucopyranoside (1), along with four known flavonoids, luteolin (2), isoquercetin (3), catechin (4), and diosmetin (5), has been isolated and characterized from Salix denticulata. The structure of the new flavone diglucoside was characterized by means of high field 1D and 2D NMR and MS spectral analysis. 相似文献
14.
Phytochemistry of genus Gentiana XXV: Study of the flavonic and xanthonic compounds in leaves of Gentiana X marcailhouana RY . New cinnamoyl-C-glucosyl-flavones Nine flavonic compounds: isoorientin ( 1 ), isovitexin ( 2 ), isoorientin-4′-O-β-D -glucoside ( 3 ), isovitexin-4′-O-β-D -glucoside ( 4 ), luteolin-7-O-β-D -glucoside ( 5 ), trans-cafeoyl-2′′-isoorientin ( 6 ), trans-feruloyl-2′′-isoorientin ( 7 ), trans-p-coumaroyl-2′′-isoorientin ( 8 ), p-O-β-D -glucosyl-trans-cafeoyl-2′′-isoorientin ( 9 ) and three xanthones: gentioside ( 10 ), isogentisine ( 11 ), mangiferin ( 12 ), have been identified from leaves of Gentiana X marcailhouana RY . Compounds 8 and 9 were described for the first time. The cyclitol L -(+)-bornesitol ( 13 ) has been also isolated. 相似文献
15.
Mingyue Jiang Wenjie Zhang Xu Yang Fen Xiu Haoran Xu 《Natural product research》2018,32(20):2431-2436
A novel isoindole alkaloid named oleraisoindole (1), together with six known compounds, 7′-ethoxy-trans-feruloyltyramine (2), N-trans-feruloyltyramine (3), N-trans-feruloyl-3-methoxytyramine (4), N-trans-p-coumaroyltyramine (5) aurantiamide (6) and ferulic acid methyl ester (7) were isolated from Portulaca oleracea L. Compounds 2 and 7 were isolated for the first time from this plant. Compound 1 was identified using spectroscopic methods including HR-ESI-TOF-MS, 1D-NMR, 2D-NMR. It was tested in a nitric oxide (NO) inhibition assay and was shown to inhibit NO production in RAW 264.7 cells induced by LPS. 相似文献
16.
Yajuan Xu Tunhai Xu Yue Liu Shengxu Xie Yunshan Si Tonghua Liu Dongming Xu 《Chemistry of Natural Compounds》2010,46(2):242-245
The structures of five furostanol glycosides (1–5), of which the 26-O-β-D-glucopyranosyl-(25S),5α-furost20(22)-en-12-one-2α,3β,26-triol-3-O-β-D-glucopyranosyl-(1→4)-β-D-galactopyranoside (1) was new, from the leaves of Tribulus terrestris L. were established using chemical and NMR spectroscopic methods. 相似文献
17.
Junwei He Xiaoying Huang Yaqi Wang Jian Liang Ronghua Liu 《Natural product research》2019,33(11):1599-1604
Hosta plantaginea was a traditional Chinese medicinal plants used to treat inflammatory and painful diseases with partial scientific validation. Solvent extractions followed by repeated chromatographic purification of the H. plantaginea flowers led to the isolation of one new flavonoid glycoside, hostaflavone A (1), together with one related known compound, kaempferol-3-O-sophoroside-7-O-glucoside (2), and their structures were elucidated on the basis of chemical and spectral evidence, as well as by comparison with literature data. Compounds 1 and 2 were evaluated for the anti-inflammatory activites against cyclooxygenases (COX-1 and COX-2) and DPPH free radical-scavenging activities in vitro. The results revealed that 1 and 2 exhibited significant COX-1 inhibition and moderate COX-2 inhibition compared to the reference celecoxib. Additionally, 1 and 2 displayed insignificant antioxidant activities compared to the positive control L-ascorbic acid. 相似文献
18.
V. B. Nazarov V. G. Avakyan S. P. Gromov M. V. Fomina T. G. Vershinnikova V. Yu. Rudyak M. V. Alfimov 《Russian Chemical Bulletin》2007,56(2):281-289
The electronic absorption spectra and fluorescence spectra of 4-(2-naphthyl)pyridine (1), 2-(4-methyl-2-pyridyl)-4-(2-naphthyl)pyridine (2), and 4-(2-naphthyl)-2-phenylpyridine (3) in solutions and in complexes with β-cyclodextrin (β-CD) and well water-soluble hydroxy-propyl-β-cyclodextrin (HP-β-CD)
were studied. Fluorescence near 475 nm observed in aqueous solutions of compounds 1–3 arises from protonated forms of these compounds produced in the excited state. Results of DFT quantum chemical calculations
show an increase in proton affinity energies of excited-state naphthylpyridines 2 and 3. The formation of inclusion complexes with cyclodextrins makes protonation of compounds 2 and 3 more difficult, which manifests in large hypsochromic shifts of fluorescence band maxima. The stability constants of the
complexes 1·HP-β-CD and 2·HP-β-CD determined from their fluorescence spectra are 3425 and 3760 L mol−1, respectively. The stability constant of the complex 3·HP-β-CD (5500±600 L mol−1) was found from the changes in the solubility of naphthylpyridine 3 in water upon complexation. Semiempirical quantum chemical calculations of the molecular structures and thermodynamic characteristics
of pseudorotaxane inclusion complexes of trans-2, cis-2, and trans-2·H2O with HP-β-CD were carried out.
Published in Russian in Izvestiya Akademii Nauk. Seriya Khimicheskaya, No. 2, pp. 272–280, February, 2007. 相似文献
19.
One new dihydroisocoumarin, (3S)-5-hydroxy-8-O-methylmellein (1), as well as nine known compounds, 5-formylmellein (2), mellein-5-carboxylic acid (3), 5-hydroxymethylmellein (4), 3β-hydroxystigmast-5- en-7-one (5), N-trans-feruloyltyramine (6), N-cis-feruloyltyramine (7), vanillic acid (8), methyl paraben (9), and syringaldehyde (10), were isolated from the n-BuOH-soluble fraction of the 70% EtOH extract of rice fermented with the endophytic fungus Biscogniauxia cylindrospora (BCRC 33717). Their structures were elucidated by 1D and 2D NMR spectroscopy together with HR-ESI-MS analysis and comparison
of the spectroscopic data with those reported for structurally related compounds. 相似文献
20.
Chengcheng Zhao Zheming Ying Xiaojun Tao Mingyue Jiang 《Natural product research》2018,32(13):1548-1553
A new lactam alkaloid named oleraciamide D (1), indentified as (5R)-4-(3-methoxy-4-hydroxyphenyl)-5-(4-hydroxyphenyl)-5,6-dihydropyridin-2(1H)-one, together with five known compounds, indole-3-aldehyde (2), portulacatone (3), N-trans-feruloyloctopamine (4), N-trans-feruloyl-3′-O-methyldopamine (5) and N-trans-feruloyltyramine (6) were isolated from Potulaca oleracea L. Among them, indole-3-aldehyde (2) was isolated from the medicine for the first time. The structure of the new alkaloid was elucidated via UHPLC-ESI-Q-TOF/MS, 1D NMR and 2D NMR. The five known compounds were established by comparing the 1H-NMR and 13C NMR with the reported literature. Oleraciamide D (1) showed cytotoxicity against SH-SY5Y cells when concentration at 50 uM by CCK-8 method. 相似文献