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Pàgina 1 des de 20 resultats
Prenylated flavonoids of the leaves of Macaranga conifera with inhibitory activity against cyclooxygenase-2.
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Two prenylated flavonoid derivatives, 5-hydroxy-4'-methoxy-2",2"-dimethylpyrano-(7,8:6",5")flavanone (1) and 5,4'-dihydroxy-[2"-(1-hydroxy-1-methylethyl)dihydrofurano]-(7,8:5",4")flavanone (2), were isolated from an ethyl acetate-soluble extract of the leaves of Macaranga conifera using an in vitro
Cytotoxic prenylated bibenzyls and flavonoids from Macaranga kurzii.
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One unique prenylated bibenzyl, kurzphenol A (1), two new prenylated flavonoids, kurzphenols B and C (2 and 3), as well as fourteen known compounds (4-17) were isolated from the twigs of Macaranga kurzii. Compound 1 was the first example of prenylated bibenzyl which possesses a benzofuran ring. All
Cytotoxic prenylated flavonoids from Macaranga indica.
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Three new prenylated flavonoids, macarindicins A-C (1-3), as well as seven known compounds (4-10) were isolated from the twigs of Macaranga indica. Their structures were elucidated on the basis of extensive spectroscopic interpretation. Compounds 2 and 3 enriched the diversity of prenyl moiety in
Prenylated flavonoids and other constituents from Macaranga indica.
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Four new prenylated flavonoids, macarindicins I-IV (1-4) together with ten known compounds, broussoflavonol F (5), vedelianin (6), schweinfurthin E (7), vitexin (8), 2″-rhamnosyl vitexin (9), isovitexin (10),
New flavonoid and stilbene derivatives from the fruits of Macaranga balansae.
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Two new prenylated flavonoids, 4´-methyl-8-prenyltaxifolin (1) and 6,8-diprenyl-4´-methyl-naringenin (2) and a new geranylated stilbene, 4'-deprenyl-4-methoxymappain (3) together with eight known flavonoids (4-11) were isolated from the fruits of Macaranga balansae Gagnep. Their chemical structures
Minor Prenylated Flavonoids from the Twigs of Macarangaadenantha and Their Cytotoxic Activity.
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Three new minor prenylated flavonoids, named macadenanthins A-C (1-3), together with three known ones (4-6), were isolated from the twigs of Macaranga adenantha. Their structures were elucidated on the basis of extensive spectroscopic analysis including NMR, UV and MS. The prenyl moieties in
Three new prenylated flavonoids from Macaranga denticulata and their anticancer effects.
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One rare flavonoid-diterpene heterodimer, denticulatain C (1), one modified geranyl-type side chain substituted flavonoid, denticulatain D (2) and one geranylated flavonoid, denticulatain E (3), as well as 11 known compounds (4-14) were isolated from the fronds of Macaranga denticulata. Their
Antiproliferative prenylated stilbenes and flavonoids from Macaranga alnifolia from the Madagascar rainforest.
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Bioassay-guided fractionation of an extract of the fruit of Macaranga alnifolia from Madagascar led to the isolation of four new prenylated stilbenes, schweinfurthins E-H (1-4), and one new geranylated dihydroflavonol, alnifoliol (5). The known prenylated stilbene vedelianin (6) and the known
Isoprenylated Flavonoids with PTP1B Inhibition from Macaranga denticulata.
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Three new C-methylated and isoprenylated chalcone derivatives, dentichalcones A-C (1-3), together with six known compounds (4-9), were isolated from the twigs and leaves of Macaranga denticulata. Their structures were elucidated by spectroscopic analysis, including 1D, 2D NMR, and MS data. The known
Flavonoid and stilbene derivatives from Macaranga trichocarpa.
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A new farnesylated flavonol (4'-O-methylmacagigantin) and a new geranylated stilbene (macatrichocarpin H), together with eight known phenolic compounds, have been isolated from the leaves of Macaranga trichocarpa. Structures of these compounds were determined based on NMR and mass spectrroscopic
Flavonoids with antiplasmodial and cytotoxic activities of Macaranga triloba.
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A new flavanone derivative, malaysianone A (1), four prenylated flavanones, 6-prenyl-3'-methoxyeriodictyol (2), nymphaeol B (3), nymphaeol C (4) and 6-farnesyl-3',4',5,7-tetrahydroxyflavanone (5), and two coumarins, 5,7-dihydroxycoumarin (6) and scopoletin (7), were isolated from the dichloromethane
Acetylcholinesterase inhibitors from the leaves of Macaranga kurzii.
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Bioassay-guided fractionation of an extract of leaves of Macaranga kurzii yielded four new compounds, a stilbene (furanokurzin, 1) and three flavonoids (macakurzin A-C, 2-4). Nine known compounds were also isolated (5-13). Their structures were determined by spectroscopic analyses including MS and
Phenolic derivatives with an irregular sesquiterpenyl side chain from Macaranga pruinosa.
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A stilbene and two flavonoid derivatives, macapruinosins A-C (1-3), together with two known flavonoids, papyriflavonol A and nymphaeol C, have been isolated from the acetone extract of the leaves of Macaranga pruinosa. The structures of these compounds were identified based on spectral data
Cytotoxic Phenolic Compounds from Fruit Glandular Trichomes of Macaranga tanarius.
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A new flavonoid, macatanarin D (1), together with five known stilbenes (2-6), was isolated from fruit glandular trichomes of Macaranga tanarius. Their structures were elucidated on the basis of spectroscopic methods and through comparison with data reported in the literature.
Cytotoxic phenolic compounds isolated from the fruits of Macaranga denticulata.
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A new modified geranylated flavonoid, 3'-dehydroxy-solophenol C (1), along with 17 known compounds (2-18) were isolated from the fruits of Macaranga denticulata. Their structures were established by spectral analysis, such as mass spectrometry, 1D-NMR and 2D-NMR. The new
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