RESUMO
The leaves of Tillandsia fasciculata afforded four tetracyclic triterpenoids of the cycloartane type, two new compounds identified as cyclolaudenyl formate (2) and the (24S)-24-isopropenyl cycloartanone, which we named tillandsinone (1), and the known cyclolaudenone (3) and cyclolaudenol (4).
Assuntos
Fitosteróis/isolamento & purificação , Plantas Medicinais/química , Triterpenos/isolamento & purificação , Cromatografia Gasosa-Espectrometria de Massas , Espectroscopia de Ressonância Magnética , México , Fitosteróis/química , Folhas de Planta/química , Triterpenos/químicaRESUMO
The leaves of Senna racemosa yielded the piperidine alkaloid cassine and an inositol methyl ether. Antimicrobial screening of the compounds revealed antibacterial activity of cassine with minimum inhibitory concentrations of 2.5 mg/ml for Staphylococcus aureus and Bacillus subtilis and 5.0 mg/ml for Candida albicans.
Assuntos
Anti-Infecciosos/farmacologia , Cetonas/farmacologia , Piperidinas/farmacologia , Extratos Vegetais/farmacologia , Plantas Medicinais/química , Antibacterianos , Anti-Infecciosos/química , Aspergillus niger/efeitos dos fármacos , Bacillus subtilis/efeitos dos fármacos , Candida albicans/efeitos dos fármacos , Escherichia coli/efeitos dos fármacos , Humanos , Testes de Sensibilidade Microbiana , Extratos Vegetais/química , Folhas de Planta/química , Pseudomonas aeruginosa/efeitos dos fármacos , Staphylococcus aureus/efeitos dos fármacosRESUMO
The methanol and water extracts of six Fabaceae species, traditionally used in Mayan medicine for the treatment of diarrhoea and eye infections, were phytochemically screened and tested for in vitro antimicrobial activity. Four species showed activity against Gram positive bacteria, five exhibited some activity against Candida albicans, two exhibited activity against Aspergillus niger and only one, Mimosa pigra, inhibited growth of Pseudomonas aeruginosa. None of the extracts was active against Escherichia coli.