RESUMO
A new isoflavone (Z)-5,7,4'-trihydroxy-3'-[3-hydroxy-3-methyl-1-butenyl] isoflavone (1) together with seven known isoflavones (2-8) were isolated from the fruits of the Ficus auriculata. Their structures were established on the basis of 1 D, 2 D-NMR spectroscopic data and HR-ESI-MS analysis. All compounds were evaluated for their antibacterial activities against five pathogenic bacteria in vitro. Compounds 3 and 4 exhibited significant antibacterial activities against five pathogenic bacteria with the MIC values ranging from 1.25 to 20 µg/mL.[Formula: see text].
Assuntos
Ficus , Isoflavonas , Antibacterianos/química , Ficus/química , Frutas/química , Isoflavonas/química , Estrutura Molecular , Extratos Vegetais/químicaRESUMO
One new furofuran lignan 2-methoxy-9ß-hydroxydiasesamin (1), and four analogues (2-5), together with eight alkaloids (6-13), were isolated from the ethanol extract of the aerial part of Clinacanthus nutans. Their structures were elucidated by the detailed analysis of comprehensive spectroscopic data. All the compounds were isolated from the genus of Clinacanthus for the first time. In addition, lignans isolated from C. nutans was reported for the first time. Compound 1 exhibited modest activity against three human tumor cell lines Hela, MCF-7, and A549, with IC50 values of 68.55, 60.00, and 59.17 µM, respectively.
Assuntos
Acanthaceae/química , Alcaloides/química , Alcaloides/farmacologia , Lignanas/química , Lignanas/farmacologia , Células A549 , Alcaloides/isolamento & purificação , Antineoplásicos Fitogênicos/química , Antineoplásicos Fitogênicos/farmacologia , Linhagem Celular Tumoral , Ensaios de Seleção de Medicamentos Antitumorais , Células HeLa , Humanos , Lignanas/isolamento & purificação , Células MCF-7 , Espectroscopia de Ressonância Magnética , Estrutura Molecular , Plantas Medicinais/químicaRESUMO
Two new compounds penibenzophenones A-B (1-2), and the synthetic α,ß-unsaturated amide alkaloid (E)-tert-butyl(3-cinnamamidopropyl)carbamate (4), newly identified as a natural product, alone with three known ones (3, 5-6) were isolated from the EtOAc extract of the endophytic fungus Penicillium citrinum HL-5126 isolated from the mangrove Bruguiera sexangula var. rhynchopetala collected in the South China Sea. Compound 1 was a chlorinated benzophenone. The structures of 1-6 were elucidated by extensive NMR spectral interpretation, MS data and X-ray analysis. The new compound 2 displayed cytotoxic activity against human A549 cell lines with an IC50 value of 15.7 µg/mL, and 1 showed antibacterial activity against Staphylococcus aureus with a MIC value of 20 µg/mL.