Now showing items 1-8 of 8
Constituents of Cassia rugosa
(Fitoterapia, 1993-01-01) [Artigo]
In vitro allelopathic potential of Leonurus sibiricus L. leaves
(Journal of Plant Interactions, 2008-01-01) [Artigo]
The chemical interaction between plants is known as allelopathy and it is related to the release of substances into the environment. The present study aimed at the evaluation of the allelopathic activity of the leaves of ...
Mutagenicity of Flavonoids Assayed by Bacterial Reverse Mutation (Ames) Test
(Molecules, 2012-05-01) [Artigo]
The mutagenicity of ten flavonoids was assayed by the Ames test, in Salmonella typhimurium strains TA98, TA100 and TA102, with the aim of establishing hydroxylation pattern-mutagenicity relationship profiles. The compounds ...
An unusual C-6-C-6 '' linked flavonoid from Miconia cabucu (Melastomataceae)
(Phytochemistry, 2007-07-01) [Artigo]
Chromatographic fractionation of the methanolic extract from the leaves of Miconia cabucu Hoehne (Melastomataceae) afforded the first example of a C-6-C-6 linked flavone dimer, 5-hydroxy-4',7-dimethoxyflavone-(6-C-6)-5-hydroxy-3 ...
Use of on-line liquid chromatography-nuclear magnetic resonance spectroscopy for the rapid investigation of flavonoids from Sorocea bomplandii
(Journal of Chromatography A, 2002-04-12) [Artigo]
This paper reports the identification of di- and triglycosylated flavonoids from Sorocea bomplandii (Moraceae) by liquid chromatography coupled on-line to nuclear magnetic resonance (LC-NMR). These glycosylated flavonoids ...
Xanthones and flavonoids from Leiothrix curvifolia and Leiothrix flavescens
(Phytochemistry, 2001-04-01) [Artigo]
8-Carboxymethyl-1,6-dihydroxy-3,5-dimethoxyxanthone 8-carboxymethyl-1,5,6-trihydroxy-3-methoxyxanthone and 8-carboxy-methyl-1,3,5,6-tetrahydroxyxanthone were isolated from the capitula of Leiothrix curvifolia and Leiothrix ...
Chemical profile of Eriocaulon ligulatum (Vell.) LB Smith (Eriocaulaceae)
(Biochemical Systematics and Ecology, 2005-11-01) [Artigo]
Two new and six known flavonoids and two known naphthopyranones have been isolated by chromatographic methods and spectrometrically identified in capitulae and scapes of Eriocaulon ligulatum (Vell.) L.B. Smith (Eriocaulaceac). ...
Chemical constituents and allelopathic activity of Machaerium eriocarpum Benth.
(Natural Product Research, 2018-01-01) [Artigo]
The analysis by HPLC-PDA of the hydroalcoholic extract of the leaves of M. eriocarpum together with the injection of the fractions containing the already identified metabolites allowed the detection of at least 5 flavonoids, ...