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OBJECTIVE@#To isolate the phenolic amides from the dried bulbs of Allium chinense and investigate their myocardium protective activities.@*METHODS@#The chemical constituents were isolated and purified by combining with silica gel column, Sephadex LH-20 column, HPLC and other chromatography techniques. Their structures were elucidated by NMR techniques and mass spectrometry. The isolated compounds were evaluated to determine their protective effect for myocardium cells in vitro.@*RESULTS@#Two new phenolic amides, namely, alichinemide I ( 1) and alichinemide II ( 2), and six konwn amides were isolated from the dried bulbs of A. chinense. The structures of compounds 3- 8 were identified as 3-indolcarbaldehyde ( 3), 1-(2-aminophenyl)urea ( 4), 2,3,4,9-tetrahydro-1H-pyrido[3,4-b]indole-3-carboxylic acid ( 5), N-trans-feruloyltyramine ( 6), N-trans-p-coumaroyltyramine ( 7), and N-(3,4-dimethoxyphenethyl) acetamide ( 8). Compound 3 (50 μmol/L) showed significant inhibitory effect on the damage of H9c2 myocardial cells induced by H2O2in vitro.@*CONCLUSION@#Compounds 1 and 2 were new phenolic amides. Compound 3 could be one of the potential myocardium protective constituents of A. chinense.
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Objective The chemical composition and blood components of Tianmaxingnao capsules were discovered and examined using UPLC-Q/TOF-MS,and the possible pharmacological substance basis was preliminarily elucidated.Methods An UPLC-Q/TOF-MS method was developed in this study to determine the chemical composition of Tianma Xingnao capsules.After administration of Tianmaxingnao capsules,gather and examine rat plasma samples to investigate the exposed components of Tianmaxingnao capsules in rats.Results A total of 195 chemical components were identified in Tianmaxingnao capsules,including phenols,triterpenoid saponins,phenylethanol glycosides,cyclic ether terpenes,lipids,and phenylpropanoids.These components include those that are typical of Gastrodia elata Bl,Pheretima,Cistanche deserticola Ma,Rehmannia glutinosa,Polygala hybrida DC,and Acorus tatarinowii.Rat plasma samples were used to identify 37 prototype components and 3 metabolites of Tianmaxingnao capsules after they were administered.Conclusion This approach is easy to use,effective,sensitive,and precise.It may be used to investigate Tianmaxingnao capsules and the components that reach the bloodstream in detail,as well as to provide a first understanding of the pharmacological basis of the capsules.This study serves as a foundation for clarifying the pharmacological basis of Tianmaxingnao capsules and holds some reference value in exposing the pharmacological mechanism of the product.
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Objective To study the chemical constituents from ethyl acetate extracts of the strips of Semiliquidambar cathayensis.Methods The strips of S.cathayensis were extracted by 80%ethanol and the extracts were evaporated.Fourteen compounds in ethyl acetate extracts were isolated and purified by various chromatographic techniques,such as silica gel,Sephadex LH-20 column and pre-HPLC,etc.Their structures were identified on the basis of physicochemical properties and spectroscopic analysis.Antioxidant activity test was used to evaluate total extraction,each extraction part and the isolates.Results Fourteen compounds were isolated from the strips of S.cathayensis and identified by NMR as tetradecanoic acid(1),stearic acid(2),sesamin(3),9-octadecenoic acid(4),linoleic acid(5),dibutylphthalate(6),stigmasterol(7),β-sitosterol(8),lupeol(9),oleanolic acid(10),lup-20(29)-ene-3-[3-keto-hexadecanoate](11),peujaponisin(12),C-veratroylglycol(13),and 2,3-dihydroxy-1-(4-hydroxy-3,5-dimethoxyphenyl)-1-propanone(14).Conclusion Compounds 1,3,4,5,6,7,9,11,12,13 and 14 were isolated from this plant for the first time.The EA part,compounds 13(C-veratroylglycol)and 14(2,3-dihydroxy-1-(4-hydroxy-3,5-dimethoxyphenyl)-1-propanone)showed significant antioxidative effects.
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Objective: To isolate and identify the undescribed compounds from the fruits of Cinnamomum migao and evaluate its nitric oxide inhibition potential. Methods: The chromatographic techniques of silica gel, Sephadex, and HPLC were used for isolation and purification of the compounds, while HR-ESI-MS, 1D NMR, 2D NMR, ECD, and X-ray diffraction techniques were used to characterize and confirm the isolated compounds. Moreover, the anti-inflammatory activity of the isolated compounds was carried out to check inhibitory potential against the production of nitric oxide with RAW264.7 cells stimulated by LPS. Results: Camganoid A (1), a novel sesquiterpene possessing an unprecedented skeleton, and camganoid B (2), containing a unique eight-membered sesquiterpene moiety with a new carbon skeleton, were isolated and identified from the fruits of C. migao. The absolute configurations of 1 and 2 were confirmed by single crystal X-ray diffraction and electronic circular dichroism (ECD) calculations. Among these compounds, compound 1 exhibited potent inhibitory activity against the production of nitric oxide with IC
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Objective To establish the HPLC fingerprint of Ginseng Radix et Rhizoma Rubra for its quality control . Methods Sharpsil-T C18 column(4 .6 mm × 250 mm ,5 μm)was used with acetonitrile-water in gradient elution mode .The flow rate was 1 .0 ml/min ,the column temperature was maintained at 30 ℃ ,and the detective wavelength was 203 nm .Results 24 co-possessing peaks were selected as fingerprint peaks and the similarities between each of the ten areas and the standard chro-matographic fingerprints of Panax ginseng Rubra were calculated while Rb1 peak selected as the reference peak .The similarity was more than 0 .940 .Eleven chemical compounds were identified by comparing the reference substance .Conclusion The method could be used for the quality control of Panax ginseng Rubra with good precision ,stability ,and reproducibility .
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This review made a brief summary of several pharmacokinetic methods of traditional Chinese medicine (TCM ) prescription including the methods of biological effects ,plasma concentration ,integrated Pharmacokinetics of multiple effective components of TCM prescription and integrated pharmacokinetic‐pharmacodynamic of TCM prescription .The corresponding characteristics ,advantages and disadvantages of each of these methods were analyzed .And the progresses of the pharmacokinetic methods of TCM prescription were concluded and prospected .
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Objective To establish the quality standard for Shanzhajing Jiangzhi tablet by HPLC .Methods Samples were analyzed on a Agilent Zorbax SB C18 column(250 mm × 4 .6 mm ,5μm) with methanol and 0 .06 mol/L ammonium acetate (85∶15)as mobile phase at the flow rate of 0 .8 ml/min .The wavelength and column temperature were set at 210 nm and 25 ℃ ,respectively .Results The calibration curve showed a good linear relationship within the range of 0 .124-2 .48 μg for oleanolic acid (r=0 .999 7) and 0 .498-9 .96 μg for ursolic acid (r=0 .999 8) .The average recovery ratio of the oleanolic acid and ursolic acid were 96 .9% (RSD=1 .26% ) and 100.4% (RSD=2 .6% ) ,respectively .Conclusion The method was proved to be good at evaluation effectiveness and practicality .
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This study aimed to identify Inulae Herba, Inulae Flos and their closely related species using the ITS2 bar-code, and secure the quality and clinical curative effect of these medicinal materials. DNA was extracted from Inula linariifolia, I. japonica, I. britanica, which are the original species of Inulae Herba and Inulae Flos, together with their closely related species. The ITS2 sequence was amplified by PCR and sequenced bidirectionally. Sequence assembly and generation of consensus sequence were conducted by the CodonCode Aligner. The genetic distances were comput-ed using MEGA 5.0 in accordance with the Kimura-2-parameter (K2P) model, and the phylogenetic tree constructed by the neighbor-joining (NJ) method. The results showed that the ITS2 sequences of the various species have stable variable sites. The intraspecific genetic distances among Inulae Herba and Inulae Flos were obviously lower than the interspecific genetic distance among the above two medicinal materials and its adulterants. The NJ tree based on ITS2 sequences can clearly differ from Inulae Herba, Inulae Flos and their closely related species. It is concluded that ITS2 sequence can be used as DNA barcode to identify Inulae Herba, Inulae Flos and their closely related species.
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<p><b>OBJECTIVE</b>To investigate the sesquiterpene lactones of the aerial parts of Inula helianthus-aquatica.</p><p><b>METHOD</b>Compounds were isolated and purified by silica gel, Sephadex LH-20 and preparative HPLC. On the basis of physicochemical properties and spectroscopic data, their structures were identified.</p><p><b>RESULT</b>Seven sesquiterpene lactones and four other compounds were obtained and identified as 2-desoxy-4-epi-pulchellin (1), 6-acetoxy-4-hydroxy-1, 10H-pseudoguaia-11 (13)-en-12,8-olide (2), 4-acetoxy-6-hydroxy-1, 10H-pseudoguaia-11(13)-en-12,8-olide (3), 8-epi-inuviscolide (4), 2,3,11,13-tetrahydroaromaticin (5), 11,13-dihydro-ergolide (6), 4-epipulchellin-2-O-acetate (7), 7-epiloliolide (8), loliolide (9), beta-sitosterol (10) and daucosterol (11).</p><p><b>CONCLUSION</b>All the compounds were isolated from this plant for the first time.</p>