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nicandra physalodes/withanolide
L'enllaç es desa al porta-retalls
7 resultats
Withanolides from aerial parts of Nicandra physalodes.
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Twenty withanolides, including previously unknown nicanlodes A-M, were isolated from aerial parts of Nicandra physalodes. Their structural elucidations were unambiguously achieved through interpretation of extensive spectroscopic data (NMR and HRMS) and by comparison with literature data. Nicanlodes
Withanolides with antibacterial activity from Nicandra john-tyleriana.
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Eleven new withanolides (1-11) were isolated and characterized from the aerial parts of Nicandra john-tyleriana. Five of these withanolides have an unmodified skeleton (1-5), two are acnistins (6, 7), and four are withajardins (8-11). These new isolates were fully characterized using a combination
Three new withanolides from the calyces of Nicandra physaloides.
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Chemical investigation on ethyl acetate extract of the calyces of Nicandra physaloides resulted in the isolation of three new withanolides named as nicphysatone A (1), nicphysatone B (2), nicphysatone C (3), together with five known withanolides, nic 17 (4), nic 7 (5), nic 2 (6), withahisolide G (7)
Withanolides and aromatic glycosides isolated from Nicandra physaloides and their anti-inflammatory activity.
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Two new withanolides (1-2) together with five known ones (3-7), and three known aromatic glycosides (8-10) were isolated from the dried stems and leaves of Nicandra physaloides, an edible and medicinal plant. Their structures were identified by extensive spectroscopic analyses or comparison with
Investigations of nicandrenone--a withanolide-like aromatic plant steroid from Nicandra physaloides.
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On the basis of IR, UV, ORD, NMR and high resoluted mass spectral data as well as chemical transformations, evidence for structure 1 of the D-homo-aromatic plant steroid nicandrenone from Nicandra physaloides (Solanaceae) was given. The sterochemistry of both epoxy lactol functions in this compound
Molecular modeling, NOESY NMR, and the structure of nicandrenone isolated from Nicandra physalodes (Solanaceae).
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The configuration and conformation of nicandrenone, isolated from Nicandra physalodes, are described using molecular modeling and NMR NOESY techniques. Amsterdam Density Functional (ADF) software was used, and the structures were those reduced to minimum energy molecular models, utilizing B3LYP
Three new C23 steroids from the leaves and stems of Nicandra physaloides.
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Nicandra physaloides is a medicinal and edible plant and has been used as traditionally herbal medicine to treat various diseases in folk. Its characteristic withanolides, a kind of ergostane-type steroids, are reported to display plentiful biological activities that many explain the effect of N.
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