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14 rezultatov
Inhibition of phospholipase Cgamma1 and cancer cell proliferation by lignans and flavans from Machilus thunbergii.
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Prijava / prijava
Thirteen compounds were isolated from the CH2Cl2 fraction of Machilus thunbergii as phospholipase Cgamma1 (PLCgamma1) inhibitors. These compounds were identified as nine lignans, two neolignans, and two flavans by spectroscopic analysis. Of these, 5,7-di-O-methyl-3',4'-methylenated (-)-epicatechin
Obtusilactone B from Machilus Thunbergii targets barrier-to-autointegration factor to treat cancer.
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Prijava / prijava
Targeting specific molecules is a promising cancer treatment because certain types of cancer cells are dependent on specific oncogenes. This strategy led to the development of therapeutics that use monoclonal antibodies or small-molecule inhibitors. However, the continued development of novel
meso-dihydroguaiaretic acid from Machilus thunbergii down-regulates TGF-beta1 gene expression in activated hepatic stellate cells via inhibition of AP-1 activity.
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Prijava / prijava
meso-dihydroguaiaretic acid (DGA), naturally occurring in plants such as Machilus thunbergii and Myristica fragrans, exhibits a neuroprotective effect and also exerts cytotoxicity to certain cancer cells. Activated hepatic stellate cells (HSCs) play an important role in liver fibrogenesis through
Composition, in vitro Cytotoxicity, and Anti-mildew Activities of the Leaf Essential Oil of Machilus thunbergii from Taiwan.
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Prijava / prijava
This study investigated the chemical composition, in-vitro cytotoxicity, and anti-mildew fungal activities of the essential oil isolated from the leaf of Machilus thunbergii from Taiwan. The essential oil was isolated using hydrodistillation in a Clevenger-type apparatus, and characterized by GC-FID
Cytotoxic neolignans and butanolides from Machilus obovatifolia.
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Prijava / prijava
From the chloroform-soluble portion of the stem wood of Machilus obovatifolia, one new neolignan, perseal F (1), four known neolignans, perseal G (2), licarin A, licarin B, acuminatin, two butanolides, linderanolide E and isolinderanolide E, two steroids, beta-sitosterol,
Steryl epoxide, secobutanolide and butanolides from the stem wood of Machilus zuihoensis.
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Prijava / prijava
A steryl epoxide, machillene (1), a secobutanolide, secomahubanolide (2), and two butanolides, zuihoenalide (3), and 3-(1-methoxyoctadecyl)-5-methylene-5H-furan-2-one (4), together with 12 known compounds, were isolated from stem wood of Machilus zuihoensis. Their structures were determined by means
[Chemical constituents from Machilus wangchiana].
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Prijava / prijava
Twenty-one compounds were isolated from an ethanol extract of Machilus wangchiana by a combination of various chromatographic techniques including column chromatography over silica gel and Sephadex LH-20 and reversed-phase HPLC. Their structures were identified by spectroscopic data analysis
Additional cytotoxic neolignans from Persea obovatifolia.
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Prijava / prijava
Four additional neolignans, comprising obovatifol [(2S,3S)-2,3-dihydro-2- (3,4-dihydroxy-5-methoxyphenyl)-7-methoxy-3-methyl-5-trans-propenyl benzofuran], obovaten [2-(3,4-dihydroxy-5-methoxyphenyl)-7-methoxy-3- methyl-5-trans-propenyl benzofuran], perseal C
Chemical constituents of the bark of Machilus wangchiana and their biological activities.
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Prijava / prijava
Eleven new metabolites, butanolides 1-6, lignan derivatives 7-9, sesquiterpene 10, and 3',4'-seco-flavane derivative 11, have been isolated from an ethanol extract of Machilus wangchiana. Twenty known compounds, including ginkgolides A and B (16 and 17), were also isolated. Their structures and
Cucurbitane glucosides from the root of Machilus yaoshansis.
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Prijava / prijava
Seven new cucurbitane triterpene glucosides (1-5, 8, and 9) and five known analogues (6, 7, 10, cucurbitacin I 2-O-β-d-glucopyranoside, and khekadaengoside K) have been isolated from an ethanol extract of roots of Machilus yaoshansis. Compounds 1 and 2 have an unusual 16,23:22,25-diepoxy unit, 4 is
Machilusides A and B: structurally unprecedented homocucurbitane glycosides from the stem bark of Machilus yaoshansis.
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Prijava / prijava
Two structurally novel homocucurbitane triterpenoid glycosides, machilusides A (1) and B (2), possessing an unprecedented C(36) skeleton with a D-fructose moiety incorporated into a cucurbitane nucleus forming unique cage-like tricyclic ring moieties, were isolated from the stem bark of Machilus
Composition, in-vitro anticancer, and antimicrobial activities of the leaf essential oil of Machilus mushaensis from Taiwan.
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Prijava / prijava
This study investigated the chemical composition, in-vitro anticancer, and antimicrobial activities of the essential oil isolated from the leaf of Machilus mushaensis from Taiwan. The essential oil was isolated using hydrodistillation in a Clevenger-type apparatus, and characterized by GC-FID and
Yaoshanenolides A and B: new spirolactones from the bark of Machilus yaoshansis.
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Prijava / prijava
Two novel tricyclic spirolactones bearing long linear alkyl chains, yaoshanenolides A (1) and B (2), formed by Diels-Alder[4 + 2] cycloaddition of a molecule of each butenolide with β-phellandrene, were isolated from the bark of Machilus yaoshansis. Their structures and absolute configurations were
Two novel glycosidic triterpene alkaloids from the stem barks of Machilus yaoshansis.
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Prijava / prijava
[structure: see text] Two unusual glycosidic triterpene alkaloids, machilaminosides A (1) and B (2), have been isolated from the stem barks of Machilus yaoshansis. Their structures were elucidated by detailed spectroscopic analysis. A possible biogenetic origin of 1 and 2 mediated by the coupling of
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