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germacranolide/artemisia
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12 resultados
A new germacranolide from Artemisia pallens.
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A new germacranolide has been isolated from the aerial parts of Artemisia pallens and the structure was established as 4,5 beta-epoxy-10 beta-hydroxy-1-en-3-one-trans-germacran-6 alpha,12-olide (1) by comparison with its 10 alpha-epimer isolated from the same plant.
Guaiane dimers and germacranolide from Artemisia caruifolia.
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One new germacranolide (named caruifolin A) and three new guaiane dimers (caruifolins B-D), together with six known compounds, were isolated from the aerial parts of Artemisia caruifolia. The structures were determined by chemical and spectroscopic methods.
Germacranolides from Artemisia myriantha and their conformation.
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The CH(2)Cl(2) extract of the aerial parts of Artemisia myriantha afforded three germacranolides derived from 13-acetoxy-3beta-hydroxy-germacra-1(10)E,4E,7(11)-trien-12,6alpha-olide, whose structures were elucidated by 2D-NMR spectroscopic analyses. Some conclusions are drawn about the possible
A bioassay for inhibition of serotonin release from bovine platelets.
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A bioassay was developed to study agents capable of inhibiting the release of serotonin from bovine blood platelets. It is a simple, inexpensive, and reproducible high-throughput bioassay suitable for quality control of feverfew, Tanacetum parthenium, a crude drug with proven migraine prophylactic
Non volatile constituents of the vermouth ingredient Artemisia vallesiaca.
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The Alpine wormwood Artemisia vallesiaca All. was considered the most valuable ingredient of vermouth, a celebrated aromatized wine. A. vallesiaca has a very limited geographical distribution, and the booming market of vermouth decimated its natural population, resulting in the eventual replacement
Sesquiterpene lactones from the endemic Cape Verdean Artemisia gorgonum.
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Leaves and flowers of Artemisia gorgonum (Asteraceae) collected in Fogo, Cape Verde islands, were phytochemically investigated and resulted in isolation and characterization of three guaianolides 1, 2, 5, and a secoguainolide 4, in addition to eight known guaianolides 6-11 and two known
Mono- and sesquiterpenes and antifungal constituents from Artemisia species.
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In addition to beta-sitosterol and alpha-amyrin detected in all the investigated species, the extract of the aerial parts of Artemisia giraldii var. giraldii gave stigmasterol, daucosterol, sesamine, luteolin, eupafolin, hispidulin, eupatilin, belamcanidin, pinitol, artemin, ridentin, and a new
Chemical and biomolecular characterization of Artemisia umbelliformis Lam., an important ingredient of the alpine liqueur "Genepi".
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Artemisia umbelliformis Lam., an important alpine plant used for the preparation of flavored beverages, showed a remarkable intraspecific variability, at both genomic and gene product (secondary metabolites) levels. The variability of A. umbelliformis Lam. currently cultivated in Piedmont (Italy,
Artemyrianolides A-S, Cytotoxic Sesquiterpenoids from Artemisia myriantha
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Random screening suggested that the EtOH extract of Artemisia myriantha (Asteraceae) and its EtOAc fraction had cytotoxicity against HepG2 cells with inhibitory ratios of 30.6% and 53.5% at 50.0 μg/mL. Bioassay-guided isolation of the most active fractions (Fr. C and Fr. D) afforded 19 new
Sesquiterpene lactone containing Mexican Indian medicinal plants and pure sesquiterpene lactones as potent inhibitors of transcription factor NF-kappaB.
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The potential inhibitory effect of 54 Mexican Indian medicinal plants on the activation of transcription factor NF-kappaB was studied. Band-shift experiments identified the ethanolic leaf extracts of Artemisia ludoviciana ssp. mexicana, Calea zacatechichi, and Polymnia maculata (all rich in
Antiproliferative activity of Artemisia asiatica extract and its constituents on human tumor cell lines.
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The extract of Artemisia asiatica herb with antiproliferative activity against four human tumor cell lines (A2780, A431, HeLa, and MCF7) was analyzed by the MTT assay, and bioassay-directed fractionation was carried out in order to identify the compounds responsible for the cytotoxic activity.
Sesquiterpene Lactones from Artemisia Genus: Biological Activities and Methods of Analysis.
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Sesquiterpene lactones are a large group of natural compounds, found primarily in plants of Asteraceae family, with over 5000 structures reported to date. Within this family, genus Artemisia is very well represented, having approximately 500 species characterized by the presence of eudesmanolides
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