Now showing items 1-10 of 42
In vitro cytotoxicity of some natural and semi-synthetic isocoumarins from Paepalanthus bromelioides
(Zeitschrift fur Naturforschung - Section C Journal of Biosciences, 2002-01-01) [Artigo]
Numerous natural compounds have a potential for therapeutic applications, but may have to be chemically modified to alter toxic side effects. We investigated structural parameters that could affect the cytotoxicity of ...
Lichen metabolites modulate hydrogen peroxide and nitric oxide in mouse macrophages
(Zeitschrift fur Naturforschung - Section C Journal of Biosciences, 2009-11-20) [Artigo]
The activities of perlatolic acid (1), atranorin (2), and lecanoric acid (3) and their derivatives, such as orsellinates and β-methyl orsellinates obtained by alcoholysis, were assessed for stimulation of the release of ...
Isolated flavonoids against mammary tumour cells LM2
(Zeitschrift fur Naturforschung - Section C Journal of Biosciences, 2009-03-24) [Artigo]
The purpose of the present study was to investigate antitumour and anti-inflammatory activities of flavonoids isolated from Byrsonima crassa, Davilla elliptica and Mouriri pusa. The antitumour activity was measured by the ...
Xeractinol - A new flavanonol C-glucoside from Paepalanthus argenteus var. argenteus (Bongard) Hensold (Eriocaulaceae)
(Journal of the Brazilian Chemical Society, 2007-01-01) [Artigo]
New compound isolated from methanolic extract from the leaves of Paepalanthus argenteus var. argenteus (Bongard) Hensold was characterized as xeractinol, a new dihydroflavonol C-glucoside. The structure was elucidated on ...
Effects of limonene and essential oil from Citrus aurantium on gastric mucosa: Role of prostaglandins and gastric mucus secretion
(Chemico-biological Interactions, 2009-08-14) [Artigo]
Essential oil from Citrus aurantium and the monoterpene limonene are widely used flavoring agents that are found in some common food items. This specie is also used medicinally throughout the world to treat gastritis and ...
Arbutin-2 '-sulphonyl from the infusion of Ilex theezans leaves
(Fitoterapia, 2004-12-01) [Artigo]
A sulphate arbutin derivative was isolated from the leaves of flex theezans, an adulterant of mate (flex paraguariensis). The structure was determined by spectral analysis. (C) 2004 Published by Elsevier B.V.
A new cytotoxic naphthopyrone dimer from Paepalanthus bromelioides
(Fitoterapia, 2000-09-01) [Artigo]
A new naphthopyrone dimer was isolated from the capitula of Paepalanthus bromelioides by chromatographic procedures. Its structure was deduced from spectrometric data. On colorimetric assay for cytotoxicity the new dimer ...
2,3,4,6-Tetra-O-(3-nitropropanoyl)-O-β-D-glucopyranoside, a new antimicrobial from the roots of Heteropteris aphrodisiaca
(Acta Farmaceutica Bonaerense, 2005-10-01) [Artigo]
A new 2,3,4,6-tetra-O-(3-nitropropanoyl)-O-β-D-glucopyranoside anomer was isolated from the roots of Heteropteris aphrodisiaca and characterized by spectroscopic methods. Activity against Staphylococcus aureus, Bacillus ...
In vitro cytotoxic activity of planifolin isolated from Paepalanthus planifolius (Eriocaulaceae) on murine mammary and lung adenocarcinoma cell lines
(Annual Review of Biomedical Sciences, 2005) [Artigo]
Chemical profile of the polar extract of Paepalanthus microphyllus (Guill.) Kunth (Eriocaulaceae)
(Revista Brasileira de Ciências Farmacêuticas, 2004-09-01) [Artigo]
Do extrato etanólico dos capítulos de Paepalanthus microphyllus, isolou-se um derivado do ácido cafeico (1). Sua estrutura foi caracterizada por métodos espectroscópicos (RMN mono e bi-dimensionais) e por espetrometria de ...