pterocarpan/leukeemia

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Induction of apoptosis by pterocarpans from Platymiscium floribundum in HL-60 human leukemia cells.

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(+)-2,3,9-Trimethoxy-pterocarpan (1) (+)-3,9-dimethoxy-pterocarpan [(+)-homopterocarpin] (2), (+)-3-hydroxy-9-methoxy-pterocarpan [(+)-medicarpin] (3) and (+)-3,4-dihydroxy-9-methoxy-pterocarpan [(+)-vesticarpan] (4) are cytotoxic pterocarpans isolated from the native Brazilian plant Platymiscium

11a-N-Tosyl-5-deoxi-pterocarpan (LQB-223), a promising prototype for targeting MDR leukemia cell lines.

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Aza-deoxi-pterocarpans (1) were synthesized through palladium-catalyzed aza-arylation of dihydronaphtalen, and showed antineoplastic effect on MDR leukemic cell lines (K562, Lucena-1 and FEPS). Compounds 1c-d were prepared to identify the pharmacophoric group responsible for the activity as well as

(+/-)-3,4-Dihydroxy-8,9-methylenedioxypterocarpan and derivatives: cytotoxic effect on human leukemia cell lines.

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Naturally occurring pterocarpans 1a,b, pterocarpan 1c, isoflavane 2 and ortho-quinone 3 were synthesized in the racemic form and their cytotoxic effect was evaluated on the human leukemia cell lines K562 (resistant to oxidative stress), Lucena-1 (MDR phenotype) and HL-60. Ortho-quinone 3 (IC(50)=1.5

Pterocarpan scaffold: A natural lead molecule with diverse pharmacological properties.

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Phytoalexins are substances produced by plants that act as potent inhibitors of pathogens. Pterocarpans are biologically active isoflavonoids most commonly found in the family Fabaceae that have the ability to act as phytoalexins. It is made up of a tetracyclic ring system possessing

Antiproliferative Pterocarpans and Coumestans from Lespedeza bicolor.

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Chromatographic purification of a methanol extract of the roots of Lespedeza bicolor led to the isolation of four new pterocarpans (1-4), two new coumestans (6 and 7), two new arylbenzofurans (8 and 9), and the known pterocarpan 1-methoxyerythrabyssin

Cytotoxic flavonoids from two Lonchocarpus species.

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A new isoflavone, 4'-prenyloxyvigvexin A (1) and a new pterocarpan, (6aR,11aR)-3,8-dimethoxybitucarpin B (2) were isolated from the leaves of Lonchocarpus bussei and the stem bark of Lonchocarpus eriocalyx, respectively. The extract of L. bussei also gave four known isoflavones, maximaisoflavone H,

Phenolic compounds from Glycyrrhiza pallidiflora Maxim. and their cytotoxic activity.

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Twenty-one phenolic compounds (1-21) including dihydrocinnamic acid, isoflavonoids, flavonoids, coumestans, pterocarpans, chalcones, isoflavan and isoflaven, were isolated from the roots of Glycyrrhiza pallidiflora Maxim. Phloretinic acid (1), chrysin (6), 9-methoxycoumestan (8), isoglycyrol (9),

New cytotoxic prenylated isoflavonoids from Bituminaria morisiana.

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Using cytotoxicity against KB cancer cells as a lead, bioguided-fractionation of the petroleum ether and ethyl acetate extracts of Bituminaria morisiana leaves led to the isolation of two new pterocarpans, namely 3,9-dihydroxy-4-(3,3-dimethylallyl) [6a R, 11a R]-pterocarpan,

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