共查询到20条相似文献,搜索用时 46 毫秒
1.
Jian Zhang Zhi-Qi Yin Peng Cao You-Bin Li Jin-Ao Duan 《Chemistry of Natural Compounds》2008,44(6):701-703
A new flavonol derivative 3, 8-dihydroxy-10-methoxy-5-H-isochromeno[4, 3-b]chromen-7-one (1) together with four known compounds, glutinone (2), luteolin (3), acacetin 7-O-α-L-rhamnopyranosyl- (1→6)-β-D-glucopyranoside (4), and rutin (5) were isolated from the dried roots of Fagopyrum dibotrys. Their structures were determined by UV, IR, MS, 1H, and 13C NMR spectroscopic analysis, including 2D NMR.
Published in Khimiya Prirodnykh Soedinenii, No. 6, pp. 567–568, November–December, 2008. 相似文献
2.
I. M. Chung H. Y. Park S. C. Chun J. J. Kim A. Ahmad 《Chemistry of Natural Compounds》2007,43(4):417-421
Three new compounds, 4-hydroxymethylene-7-(9,9,13-trimethylcyclohexyl)-heptanyl-3′,7′,7′-trimethylcyclohexa-2′,4′-dien-1′-oate
(1), 1-(n-hexadec-7-enoxy)-6-(n-octadecanoxy)-β-D-glucopyranoside (2), and (Z)-12-hydroxy-9-octadecenoic acid-12-β-D-glucopyranoside (3), along with the known compound hexacosanoic acid (4), were isolated and identified from the rice hulls of Oryza sativa. Their structures were elucidated by 1D and 2D NMR spectroscopic techniques (1H-1H COSY, 1H-13C HETCOR, DEPT) aided by EIMS, FABMS, HRFABMS, and IR spectra.
Published in Khimiya Prirodnykh Soedinenii, No. 4, pp. 344–347, July–August, 2007. 相似文献
3.
A new C-glucoside, 3,4-epoxy-5-hydroxymethyl benzoate 2-C-β-glucoside (1), together with a known alkaloid, 1H-indole-3-carbaldehyde (2), were isolated from the whole plant of Commelina communis L. The structures of these compounds were determined by 1D, 2D NMR and MS techniques.
Published in Khimiya Prirodnykh Soedinenii, No. 1, pp. 51–52, January–February, 2009. 相似文献
4.
You-Min Ying Zha-Jun Zhan Zhi-Shan Ding Wei-Guang Shan 《Chemistry of Natural Compounds》2011,47(4):541-544
A chemical study of metabolites of the strain Penicillium sp. P-1, an endophyte from the stems of Huperzia serrata, furnished a new chromone derivative, (2S)-2,3-dihydro-7-hydroxy-6,8-dimethyl-2-[(E)-prop-1-enyl]- chroman-4-one (1), an enantiomer of a known compound, and seven known compounds 2–8. The structure and absolute configuration of 1 were established using spectroscopic methods, including extensive 2D NMR and CD analyses. Cytotoxic activity of compounds
1–3 against HeLa and HepG2 cell lines were evaluated, in which compounds 2 and 3 exhibited marked cytotoxic activity against HeLa cells. 相似文献
5.
Seon-Mi Seo Hak-Ju Lee Oh-Kyu Lee Hyun-Jin Jo Ha-Young Kang Don-Ha Choi Ki-Hyon Paik M. Khan 《Chemistry of Natural Compounds》2008,44(4):419-423
A new furofuran lignan (1) along with four knownones (2-5) were isolated from the bark of Magnolia kobus. Their structures were elucidated as (+)-2α-(3’,4’-dimethoxyphenyl)-6α-(3″-hydroxy-4″,5″-dimethoxyphenyl)-3,7-dioxabicyclo[3.3.0]octane
(1), (+)-sesamin (2), (+)-yangambin (3), (+)-kobusin (4), and (+)-eudesmin (5) on the basis of their comprehensive spectroscopic analysis, including 2D NMR, and by comparison of their spectral data with
those of related compounds.
Published in Khimiya Prirodnykh Soedinenii, No. 4, pp. 338–341, July–August, 2008. 相似文献
6.
Su-Qiu Pang Guo-Quan Wang Bao-Kang Huang Qiao-Yan Zhang Lu-Ping Qin 《Chemistry of Natural Compounds》2007,43(1):100-102
A new isoquinoline alkaloid, named broussonpapyrine (1), along with three other known isoquinoline alkaloids, namely nitidine (2), oxyavicine (3), and liriodenine (4), were isolated from Broussonetia papyrifera fruits. The structures of these compounds were determined by 1D and 2D NMR, MS techniques, and chemical methods. This is
the first report of the isoquinoline alkaloids isolated from this plant.
Published in Khimiya Prirodnykh Soedinenii, No. 1, pp. 83–84, January–February, 2007. 相似文献
7.
A new briarane diterpene, juncin ZII (1), along with three known briaranes (2–4), was isolated from the EtOH/CH2Cl2 extracts of the South China Sea gorgonian Junceella juncea. The structure of 1 was established by extensive spectroscopic analysis, including 1D and 2D NMR data. For compounds 1–4 and eight other briaranes (5–12) isolated from J. juncea previously, the antifeedant activity against second-instar larvae of Spodoptera litura and cytotoxicity against S. litura cells were investigated, and it was observed that they all exhibit medium antifeedant activity. Compounds 1, 8, 9, and 12 also showed potent antifouling activity against the larval settlement of barnacle Balanus amphitrite at nontoxic concentrations with EC50 values of 0.004, 0.005, 2.82, and 0.447 μg/mL, respectively, while all compounds did not show obvious cytotoxicity against
tumor cell lines K562, A549, Hela, and Hep-2. Their structure-activity relationship was discussed.
Published in Khimiya Prirodnykh Soedinenii, No. 1, pp. 44–47, January–February, 2009. 相似文献
8.
The chemical constituents of the roots of Senecio scandens Buch.-Ham. grown in the Funiu mountains in China have been investigated.
Four compounds were isolated and identified as β−sitosterol (1), pentacosanoic acid (2), 19α-H lupeone (3), and sucrose (4). The structures of these compounds were elucidated on the basis of chemical and spectroscopic evidence. 19α-H Lupeone (3) was isolated as a single compound and its structure established unambiguously by the spectral method for the first time,
and 1H and 13C NMR data were assigned wholly by 1D and 2D NMR. 相似文献
9.
Bao-Kang Huang Lu-Ping Qin Yu-Ming Liu Qiao-Yan Zhang Han-Chen Zheng 《Chemistry of Natural Compounds》2009,45(3):363-366
A new sesquiterpene, named valeriene (1), along with three iridoids, namely valepotriate (2), dihydrovaltrate (3) and acevaltrate (4) were isolated from the ethyl acetate extract of Valeriana pseudofficinalis roots. The structures of these compounds were determined by 1D and 2D NMR, MS techniques, and X-ray single crystal diffractometry.
This is the first report of the chemical components isolated from this plant.
Published in Khimiya Prirodnykh Soedinenii, No. 3, pp. 308–310, May–June, 2009. 相似文献
10.
Zeliha Hayvali Hakan Dal Pinar Köksal Duygu Şahin Tuncer Hökelek 《Structural chemistry》2010,21(4):837-845
A series of benzyloxybenzaldehyde derivatives (1–3) were prepared by the reactions of 4-nitrobenzyl bromide with 4-hydroxy-3-methoxybenzaldehyde (vanillin), 2-hydroxy-3-methoxybenzaldehyde
(o-vanillin) and 2-hydroxy-4-methoxybenzaldehyde. When the reaction time is quite long, benzofuran derivatives (4 and 5) were obtained by the reactions of ortho-hydroxyaldehydes with the 4-nitrobenzyl bromide. Condensation reactions among the three benzyloxybenzaldehyde derivatives
(1–3) with 2-aminomethylfuran (furfurylamine) yielded the new imine compounds (6–8). The structures of these aldehydes (1–3), benzofuran derivatives (4 and 5) and imine compounds (6–8) were confirmed on the basis of elemental analyses, IR, 1H NMR and 13C NMR and mass spectroscopy. The solid-state structures of compounds 4–6 were determined by single-crystal X-ray crystallography. 相似文献
11.
The reaction of 1-amino-5-(4-methylbenzoyl)-4-(4-methylphenyl)pyrimidin-2(1H)-one/-thione (1a,b) with ethyl acetoacetate (EA) afforded moderate to good yields (59–63%) of ethyl 2-methyl-4-(4-methylbenzoyl)-5-(4-methylphenyl)-7-oxo/-thioxo-3,3a-dihydropyrazolo[1,5-c]pyrimidine-3-carboxylate
(2a,b). The newly synthesized compounds were characterized by elemental analyses, IR, 1H and 13C NMR spectral data. All were compared with their previous analogues. The reaction mechanism of 1 with EA was studied by means of the B3LYP/6-31G(d,p) method. In addition, for reactants Fukui functions were performed using
the data calculated with the Becke3–Lee–Yang–Parr (B3LYP) hybrid function. 相似文献
12.
Two new coumarins, euonidiol (1) and euoniside (2), and a known flavone, luteolin 7-methyl ether, were isolated from the aerial parts of the plant Euonymus hamiltanianus Wall. All the compounds were characterized on the basis of spectral analysis viz. 1H NMR, 13C NMR, DEPT, IR, UV, ESI-MS, and elemental analysis.
Published in Khimiya Prirodnykh Soedinenii, No. 1, pp. 10–11, January–February, 2008. 相似文献
13.
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
14.
Shu Yang Xiao-dong Yang Jing-feng Zhao Yang Jin Hong-bin Zhang Liang Li 《Chemistry of Natural Compounds》2008,44(3):334-336
A new C19-diterpenoid alkaloid, habaenine C (1), together with the two known compounds vilmorrianine C and crassicauline A, were isolated from Aconitum habaense. The structure of the new compound was elucidated on the basis of spectral analysis, including 2D NMR spectroscopy.
Published in Khimiya Prirodnykh Soedinenii, No. 3, pp. 265–266, May–June, 2008. 相似文献
15.
A new bicyclo[3.2.1]octanoid neolignan rel-(7S,8R,1′S,2′R,3′S)-Δ8′-2′-hydroxy-5,1′,3′-trimethoxy-3,4methylenedioxy-7,3′,8,1′-neolignan (1) was isolated from ethanol extract from the fruit of Ocotea heterochroma Mez & Sodiro ex Mez as well as the known compounds β-friedelanol (2), meso-dehydroguaiaretic acid (3), and yangambin (4), whose structures were elucidated on the basis of their comprehensive spectroscopic analysis including 2D NMR data. Lethality
bioassay using brine shrimp (Artemia salina Leach) was evaluated with the ethanol extract from the Ocotea heterochroma’s fruit. The toxicity of this extract was greater than the toxicity of those fractions obtained in a first solvent partition
(benzene, ethyl acetate, and butanol subfractions) and that of a mixture of acetylated 2′-epimers from the new neolignan 1.
Published in Khimiya Prirodnykh Soedinenii, No. 2, pp. 158–160, March–April, 2009. 相似文献
16.
I. M. Chung M. Ali S. C. Chun K. Y. San C. A. M. Peebles A. Ahmad 《Chemistry of Natural Compounds》2008,44(4):458-462
Two new compounds catharanthusopimaranoside A (1) and catharanthusopimaranoside B (2) along with three known compounds have been isolated from the hairy root cultures of Catharanthus roseus. Their structures have been elucidated with the help of 500 MHz NMR using 1D and 2D spectral methods viz: NMR, 1H-1H COSY, 1H-13C HETCOR, etc., and DEPT aided by EIMS, FABMS, and IR spectroscopy.
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Published in Khimiya Prirodnykh Soedinenii, No. 4, pp. 369–372, July–August, 2008. 相似文献
17.
Ricardo O. Silva Ricardo A. W. Neves Filho Rodrigo Azevedo Rajendra M. Srivastava Hugo Gallardo 《Structural chemistry》2010,21(3):485-494
In this article, we describe the complete 1H and 13C NMR signal assignments of four 1,2,4-oxadiazoles possessing light-emitting liquid crystal properties. These results were
obtained by using one- and two-dimensional NMR techniques as well as GIAO (PCM) calculations at B3LYP/6-311++G(d,p) level
for compounds 1 and 2a–d. The computed values are in good agreement with the ones obtained experimentally. In addition, some previously unexplained
thermotropic features of compounds 2a–d could be clarified with the help of the geometry optimization calculations carried out by us. 相似文献
18.
Brugnanin (1), a neolignan dioate, was isolated from a mangrove plant Bruguiera gymnorrhiza. Based on spectroscopic interpretation of MS, IR, and NMR data, 1 was elucidated as (7R*,8S*,E)-3-hydroxy-5,5′-dimethoxy-7-O-4′,8-3′-neolignan-7′-ene-9,9′-dioic acid dioctadecyl ester. MTT assay showed that 1 had weak inhibitory activity against growth of CNE-1 nasopharyngeal carcinoma cell line.
Published in Khimiya Prirodnykh Soedinenii, No. 2, pp. 147–149, March–April, 2008. 相似文献
19.
M. A. Tantray A. S. Shawl B. S. Arora B. Purinima K. Ahmad M. A. Khuroo 《Chemistry of Natural Compounds》2009,45(3):377-380
Three new glutinane-type triterpenes, 19α-glutin-5-en-19-ol (1), 2β,15α,21β-glutin-11-ene-2,15,21-triol (2), and 2β,19α-glutin-7,21-diene-2,19-diol (3), were isolated from the stem bark of Euonymus hamiltonianus. Their structures were determined by 1D and 2D NMR along with MS and IR.
Published in Khimiya Prirodnykh Soedinenii, No. 3, pp. 321–323, May–June, 2009. 相似文献
20.
One new flavonol glycoside named terniflonoside A (1) and four known flavonol glycosides were isolated from the whole plants of Clematis terniflora. The structure was determined by 1D and 2D NMR, ESI-MS techniques, and chemical methods.
Published in Khimiya Prirodnykh Soedinenii, No. 2, pp. 108–110, March–April, 2007. 相似文献