RESUMO
From the stem bark of Clausena heptaphylla, the limonoid clausenolide-1-methyl ether (1) was isolated. The structure of the compound was elucidated by extensive spectroscopic studies, including 2D NMR and MS measurements and by comparison with spectroscopic and physical data from the literature. This is the first report of occurrence of clausenolide-1-methyl ether (1) in Clausena heptaphylla.
El limonoíde clausenolido-1-metil eter (1) fue aislado de corteza de Clausena heptaphylla. La estructura del compuesto fue determinada por metodos espectroscópicos, incluyendo 2D RMN, espectrometría de masas (EM) y comparación de los datos espectroscópicos y constantes físicas con los publicados en la literatura. Este es el primer informe del aislamiento de clausenolido-1-metil eter (1) de Clausena heptaphylla.
Assuntos
Clausena/química , Casca de Planta/química , Análise EspectralRESUMO
Reversed-phase preparative HPLC analyses of the methanol extract of the aerial parts of Stachys lavandulifolia afforded a new phenylethanoid glycoside, 4,3',4'-trimethoxy-lavandulifolioside A, named lavandulifolioside B, together with three other known phenylethanoid glycosides, lavandulifolioside A, verbascoside and leucosceptoside A, and an iridoid glycoside 5-O-ß-allopyranosyloxy-aucubin (5-O-ß-allopyranosyl-monomelittoside). While the structures of the known compounds, except the iridoid glycoside, were established by direct comparison of their spectroscopic data with respective literature data, lavandulifolioside B and 5-O-ß-allopyranosyloxy-aucubin were identified comprehensively by extensive 1D and 2D NMR analyses. The distribution of the isolated compounds within the genus Stachys has been discussed.
Assuntos
Glicosídeos , Glicosídeos Iridoides , Componentes Aéreos da Planta/química , Stachys/química , Glicosídeos/química , Glicosídeos/isolamento & purificação , Glicosídeos Iridoides/química , Glicosídeos Iridoides/isolamento & purificação , Espectroscopia de Ressonância Magnética , Estrutura Molecular , Extratos Vegetais/químicaRESUMO
Annotemoyin-1, Annotemoyin-2, squamocin and cholesteryl glucopyranoside were isolated from the seeds of Annona squamosa. These compounds and plant extracts showed remarkable antimicrobial and cytotoxic activities.
Assuntos
Annona , Anti-Infecciosos/farmacologia , Bactérias Gram-Negativas/efeitos dos fármacos , Bactérias Gram-Positivas/efeitos dos fármacos , Fitoterapia , Extratos Vegetais/farmacologia , Animais , Anti-Infecciosos/administração & dosagem , Anti-Infecciosos/uso terapêutico , Artemia/efeitos dos fármacos , Humanos , Dose Letal Mediana , Fungos Mitospóricos/efeitos dos fármacos , Extratos Vegetais/administração & dosagem , Extratos Vegetais/uso terapêutico , SementesRESUMO
A new C-benzylated chalcone was isolated from the leaves of Desmos chinensis. Its structure was established as 2',4'-dihydroxy-3'-(2,6-dihydroxybenzyl)-6'-methoxychalcone on the basis of spectroscopic data.
Assuntos
Annonaceae , Fitoterapia , Extratos Vegetais/química , Chalcona/química , Humanos , Folhas de PlantaRESUMO
1-Methyl-1H-pyrimidine-2,4-dione and 3-O-beta-D-glucopyranosyl-(24beta)-ethylcholesta-5,22,25-triene, isolated from the flowers of Alangium salviifolium, showed remarkable antibacterial activities against a number of Gram-positive and Gram-negative bacterial species.
