Издательство Taylor&Francis по журналам "Natural Product Letters"
Отображаемые элементы 1-20 из 459
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(Taylor & Francis Group, 1994-08-01)A new meliacin, 11α-hydroxy-12-norazadirachtin has been isolated from the seeds of Azadirachta indica. Structure has been assigned based on spectral data and comparison with its 11-β-epimer.
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(Taylor & Francis Group, 1993-04-01)D:B-friedoolean-5-en-3β-ol obtained from Securinega tinctoria was completely characterized through its physical and spectroscopial data. The 13C assignments should replace an earlier literature report.
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(Taylor & Francis Group, 1993-11-01)The rhizomes of Hedychium coronarium (Zingiberaceae) have yielded two new diterpenes which have been identified by spectroscopic methods, notably long-range heteronuclear coupling (HMBC). Coronarin-D methyl ether is a ...
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(Taylor & Francis Group, 1995-02-01)Incubation of a monocyclic iridal (a triterpenoid from Iris species) with rat liver microsomes in the presence of NADPH led to the degradation of this substrate and to the generation of 16-hydroxy-iridal (isoiridogermanal). ...
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(Taylor & Francis Group, 1995-02-01)The configuration at C-18 of variabilin (1), isolated from a Caribbean sponge, Ircinia felix, was established to be R. Variabilin acetate (2) was oxidatively degraded and converted into di-(R)-MTPA ester of 2-methylhepta ...
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(Taylor & Francis Group, 1992-09-01)The structure of lycorenine, an Amaryllidaceae alkaloid isolated from Narcissus eugeniae, has been completely assigned by 2D NMR methods.
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(Taylor & Francis Group, 1995-01-01)(2Z)-4-Hydroxy-2-methyl-2-buten-1-yl-ß-D-glucopyranoside 1a and (2Z)-1-Hydroxy-2-methyl-2-buten-4-yl-ß-D-glucopyranoside 2a were identified in a glycosidic extract obtained from Riesling grapevine leaves by XAD-2 adsorption ...
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(Taylor & Francis Group, 1995-08-01)3,4-Dimethoxyphenyl β-D-glucopyranoside 1a was identified for the first time in a glycosidic extract obtained from piñuela (Bromelia plumieri Kartens) fruit by adsorption on Amberlite XAD-2 resin and elution with EtOAc and ...
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(Taylor & Francis Group, 1996-10-01)The seeds of Aframomum hanburyi have yielded a new cytotoxic acetylated dihydroflavonol,3-acetoxy-5,7-dihydroxy-4-methoxyflava-none (1) in addition to the known highly sweet 2R,3R-(+)-3-acetoxy-5,7,4′-trihydroxyflavanone ...
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(Taylor & Francis Group, 1994-02-01)(3S,5R,6S,7E,9ξ)-3-Hydroxy-5,6-epoxy-β-ionyl-β-D-glucopyranoside 1a was identified in a glycosidic extract obtained from apple tree leaves by XAD-2 adsorption and MeOH elution. After a two-step purification of the crude ...
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(Taylor & Francis Group, 1995-05-01)From a methanolic extract of stinging nettle (Urtica dioica L.) leaves two new β-D-glucopyranosides of diastereomeric 3-hydroxy-α-ionol[4-(4′-hydroxy-2′,6′,6′-trimethylcyclohex-2′-en-1-yl)-but-3-en-2-ol] 1a and 2a were ...
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(Taylor & Francis Group, 1996-08-01)Two novel bioactive acetogenins, 4-acetyl annonacin (1) and 4-acetyl xylomaticin (2), were isolated from the leaves and twigs of Asimina longifolia K. (Annonaceae) by directing the fractionation with the brine shrimp ...
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(Taylor & Francis Group, 1995-08-01)In addition to N-acetyl-indoline (2) and N-formylindoline (3), a new N-alkylated derivative of indoline was isolated after incubation with a number of fungal strains. Its structure was elucidated by spectral analysis and ...
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(Taylor & Francis Group, 1996-04-01)Streptomyces spec. HKI-0052 produces cytomycin (IIa) and the new 5′-hydroxymethylcytomycin (IIb) in addition to blasticidin S (Ia) and 5′-hydroxymethyl blasticidin S (Ib). The structure of the hithero unknown cytosine ...
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(Taylor & Francis Group, 1995-01-01)A new styrylpyrone derivative (+)-5β-hydroxygoniothalamin (1) was isolated from the stem bark of Goniothalamus dolichocarpus. The structure and stereochemistry of (1) and its diastereoisomer (+)-5α-hydroxygoniothalamin (2) ...
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(Taylor & Francis Group, 1994-10-01)A new C19 diterpene alkaloid, 6-deacetyl-10-hydroxyperegrine was isolated from Delphinium peregrinum together with previously obtained compounds.
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(Taylor & Francis Group, 1995-04-01)Four 9,10-dihydrophenanthrene glucosides have been isolated from Juncus effusus and their structures confirmed on spectroscopic grounds and by semisynthesis. The results of a cytotoxic assay are also reported.
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(Taylor & Francis Group, 1995-11-01)Rosmarinic acid (α-O-caffeoyl-3,4-dihydroxy phenyllactic acid) is the main phenolic constituent (1.0–7.0 μmol/kg) present in methanolic extracts of the medium from Lavandula × intermedia cell cultures which have been grown ...
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(Taylor & Francis Group, 1995-11-01)The absolute configuration assignment of (-)-magnofargesin (1) was achieved by the isomerization of 1 to (+)-magnolin.
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(Taylor & Francis Group, 1995-12-01)The structure (3S, 5R, 6S, 7E, 9R)-3-hydroxy-5,6-epoxy-β-ionyl-3-O-β-D-glucopyranoside has been attributed to stratioside I, the major component of the methanolic extract of Pistia stratiotes on the basis of its spectroscopic ...
Отображаемые элементы 1-20 из 459