61 STRUCTURAL RELATIONSHIPS OF SESQUITERPENS OBTAINED FROM ALPINIA JAPONICA (THUNB.) MIQ.
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Alpinia
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Atractylodes
Alpinia
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From the seeds of Alpinia katsumadai HAYATA, alpinetin (A) (7-hydroxy-5-methoxyflavanone) and a compound (B), whose structure has been established as 2', 4'-dihydroxy-6'-methoxychalcone by both spectroscopic methods and derivation from the known compound (A), were isolated by chromatography. The compound (B) was named cardamomin.
Alpinia
Zingiberaceae
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As the traditional Chinese medicines, Caodoukou (Semen Alpiniae Katsumadai) is from \%Alpinia hainanensis \%K. Schum., and Yizhi (Fructus Alpiniae Oxyphyllae) from \%A. oxyphylla \%Miq. Their nuclear ribosomal DNA internal transcribed spacer (ITS) regions were first sequenced. Sequence analysis showed that the ITS region (ITS 1+ITS 2) of \%A. hainanensis \%is 403 bp in length and that of \%A. oxyphylla \%is 404 bp. There are 27 variable sites (including 5.8 S coding region) in pairwise comparison of the sequences. This study could provide significant data for identifying the medicines at DNA level.
Alpinia
Zingiberaceae
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Objective To isolate and identify the compounds from the rhizome of Ampelopsis japonica(Thunb.)Makino.Methods The compounds were isolated and purified by column chromatography and their structures were identified by spectroscopic methods.Results Seven compounds were obtained from the chloroform and ethyl acetate extracts of the Ampelopsis japonica(Thunb.)Makino.The structures were determined as schizandriside(1),chrysophanol(2),physcion(3),emodin-8-O-β-D-glucopyranoside(4),poriferast-5-en-3β,7α-diol(5),palmitic acid(6),oleanolic acid(7).Conclusions Compounds 4 and 5 are isolated from the Ampelopsis japonica(Thunb.)Makino for the first time.
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Three novel eudesmane-type sesquiterpenes, 10-epi-5β-hydroperoxy-β-eudesmol (I), 10-epi-5α-hydroperoxy-β-eudesmol (II) and 4, 10-epi-5β-hydroxydihydroeudesmol (III), have been isolated from the rhizomes of Alpinia japonica. Their structures were determined by spectroscopic methods and chemical conversions.
Zingiberaceae
Alpinia
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A new C- nor D-homo steroidal alkaloid named zhebeinone was isolated from the bulbs of Fritillaria thunbergii Miq. Its structure was determined by spectral analyses and chemical conversion as 5 alpha, 14 alpha-cevanine-3 beta, 20 beta-dihydroxy-6-one or C-27 epimer of peiminine.
Epimer
Spectral Analysis
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Three compounds(1~ 3) are extracted and isolated from the flowers of lonicera japonica thunb by repeated chromatography.Three structures were identified by spectroscopic analysis(1HNMR,13CNMR and MS) to be quercetin-3-O-β-D-glucoside(1),chlorogcnic acid(2) and β-sitosterol(3) respectively.
Glucoside
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Ten compounds were isolated from the stems of Viburnum plicatum Thunb.var.tomentosum Miq.and were identified as 3,4,5-trimethoxyphenyl-1-O-β-D-glucopyranoside(1),isotachioside(2),tachioside(3),koaburaside(4),glucosyringic acid(5),lupeol(6),ursolic acid(7),chlorogenic acid(8),5-O-caffeoyl quinic acid butyl ester(9),and tricin-7-O-β-D-glucoside(10),respectively.Compounds 1-10 were isolated from this plant for the first time.
Ursolic acid
Quinic acid
Caprifoliaceae
Tricin
Chlorogenic Acid
Lupeol
Arbutin
Viburnum
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In order to explore pharmacological components and make full development and use of the stems and leaves of Lonicera japonica Thunb.,in this study,four compounds were isolated from the ethanol extracts of the stems and leaves of Lonicera japonica Thunb by column chromatography,TLC,etc.Using physical and chemical properties and spectroscopy(IR,EIMS,NMR),we identificated the structure of the four compounds as follows: β-sitosterol(I) β-daucosterol(II),ethyl caffeate(III),Ⅳ chlorogenic acid(Ⅳ).Ethyl caffeate(III) was the first isolated from Lonicera.
Chlorogenic Acid
Daucosterol
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