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esenbeckia/alkaloid
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11 resultados
Alkaloids from Esenbeckia pilocarpoides.
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A preliminary screening showed the occurrence of alkaloids only in root bark and roots of ESENBECKIA PILOCARPOIDES H. B. K., (Rutaceae). Six alkaloids have been isolated and identified from root bark: one acridone, 1-hydroxy-3-methoxy- N-methyl-acridone; four furoquinolines, maculine,
Activation of human neutrophils by Esenbeckia leiocarpa: comparison between the crude hydroalcoholic extract (CHE) and an alkaloid (Alk) fraction.
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Esenbeckia leiocarpa, a wide spread native Brazilian tree, was reported recently to possess anti-inflammatory effects in vivo, but the mechanisms involved are still not fully understood and its role in neutrophils is poorly documented. The aim of this study was to compare the effects of a crude
Bio-Guided Fractionation of Ethanol Extract of Leaves of Esenbeckia alata Kunt (Rutaceae) Led to the Isolation of Two Cytotoxic Quinoline Alkaloids: Evidence of Selectivity Against Leukemia Cells.
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Bio-guided fractionation performed on the leaves-derived ethanol extract of Esenbeckia alata (Rutaceae), a plant used in traditional medicine, led to the isolation of two alkaloids, kokusaginine 1 and flindersiamine 2, as main cytotoxic agents. Primary ethanolic extract and raw
Isolation, structure, and synthesis of novel 4-quinolinone alkaloids from Esenbeckia leiocarpa.
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Two new biocidal quinolinone alkaloids, 3-methoxy-1-methyl-2-propyl-4-quinolone [1] and 2(1'-ethylpropyl)-1-methyl-4-quinolone [2], were efficiently isolated using reversed-phase recycling hplc from the leaves of Esenbeckia leiocarpa. The structures were determined through spectroscopic data and
Alkaloids from stems of Esenbeckia leiocarpa Engl. (Rutaceae) as potential treatment for Alzheimer disease.
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Esenbeckia leiocarpa Engl. (Rutaceae), popularly known as guarantã, goiabeira, is a native tree from Brazil. Bioactivity-guided fractionation of the ethanol stems extract afforded the isolation of six alkaloids: leiokinine A, leptomerine, kokusaginine, skimmianine, maculine and flindersiamine. All
Relationship of chemical structure and anti-inflammatory activity of dihydrocorynantheol and its analogues.
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BACKGROUND
Dihydrocorynantheol (DHC) is an alkaloid compound isolated from Esenbeckia leiocarpa Engl. that has demonstrated anti-inflammatory properties in experimental models. The aim of this study was to investigate whether the modification of the chemical structure of DHC could alter its
Esenbeckia leiocarpa Engl. inhibits inflammation in a carrageenan-induced murine model of pleurisy.
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OBJECTIVE
The aim of this study was to investigate the anti-inflammatory effects of the crude hydroalcoholic extract (CHE) isolated from Esenbeckia leiocarpa Engl., and fractions and subfractions derived from it.
METHODS
Dried E. leiocarpa Engl. bark was macerated and extracted with ethanol to
In vitro antiplasmodial activity of extract and constituents from Esenbeckia febrifuga, a plant traditionally used to treat malaria in the Brazilian Amazon.
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Esenbeckia febrifuga (Rutaceae) is a plant traditionally used to treat malaria in the Brazilian Amazon region. Ethanol extract of stems displayed a good antiplasmodial activity against Plasmodium falciparum strains W-2 (IC(50) 15.5+/-0.71 microg/ml) and 3 D7 (IC(50) 21.0+/-1.4 microg/ml). Two
Aurapten, a coumarin with growth inhibition against Leishmania major promastigotes.
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Several natural compounds have been identified for the treatment of leishmaniasis. Among them are some alkaloids, chalcones, lactones, tetralones, and saponins. The new compound reported here, 7-geranyloxycoumarin, called aurapten, belongs to the chemical class of the coumarins and has a molecular
1H and 13C NMR spectra of 3,8-dimethoxyfuro[3,2-g]coumarin and maculine from Esenbeckia grandiflora Martius (Rutaceae).
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One- and two-dimensional NMR experiments were used for the unambiguous assignment of the (1)H and (13)C NMR chemical shifts of the furoquinoline alkaloid maculine (1) and the new furanocoumarin 3,8-dimethoxyfuro[3,2-g]coumarin (2).
Acute effect of β-sitosterol on calcium uptake mediates anti-inflammatory effect in murine activated neutrophils.
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OBJECTIVE
To evaluate the effect of β-sitosterol on ⁴⁵Ca²⁺ uptake in activated murine neutrophils, and upon myeloperoxidase and adenosine deaminase activity, and interleukin-1β (IL-1β) and tumour necrosis factor-α (TNF-α) levels, in carrageenan-induced inflammation in the mouse air pouch
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