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1.
China Journal of Chinese Materia Medica ; (24): 222-225, 2012.
Article Dans Chinois | WPRIM | ID: wpr-288668

Résumé

Chemical investigatation of Drosera peltata var. multisepala led to the isolation of eleven compounds using various chromatographic techniques. The structures of these compounds were elucidated as isoshinanolone-4-O-beta-D-glucoside (1), isoshinanolone (2), epi-isoshinanolone (3), plumbagin (4), droserone (5), droserone-5-O-glucoside (6), quercetin (7), kaempferol (8) , gossypetin-8-O-glucoside (9), 3,3'-dimethoxy ellagic acid (10), and ellagic acid (11) by their physicochemical properties and spectral data analysis. Compound 1 was a new compound. Compounds 3, 8, 10, and 11 were isolated from this plant for the first time.


Sujets)
Chromatographie en phase liquide , Méthodes , Drosera , Chimie , Médicaments issus de plantes chinoises , Chimie , Acide ellagique , Glucosides , Kaempférols , Spectroscopie par résonance magnétique , Méthodes , Structure moléculaire , Naphtoquinones , Extraits de plantes , Quercétine , Spectrométrie de masse ESI , Méthodes , 1,2,3,4-Tétrahydro-naphtalènes
2.
Mem. Inst. Oswaldo Cruz ; 99(7): 753-755, Nov. 2004. ilus, tab
Article Dans Anglais | LILACS | ID: lil-391607

Résumé

The antimicrobial activity of three different extracts (hexanic, ethyl acetate, methanol) obtained from Brazilian Drosera species (D. communis, D. montana var. montana, D. brevifolia, D. villosa var. graomogolensis, D. villosa var. villosa, Drosera sp. 1, and Drosera sp. 2 ) were tested against Staphylococcus aureus (ATCC 25923), Enterococcus faecium (ATCC23212), Pseudomonas aeruginosa (ATCC27853), Escherichia coli (ATCC11229), Salmonella choleraesuis (ATCC10708), Klebsiella pneumoniae (ATCC13883), and Candida albicans (a human isolate). Better antimicrobial activity was observed with D. communis and D. montana var. montana ethyl acetate extracts. Phytochemical analyses from D. communis, D. montana var. montana and D. brevifolia yielded 5-hydroxy-2-methyl-1,4-naphthoquinone (plumbagin); long chain aliphatic hydrocarbons were isolated from D. communis and from D. villosa var. villosa, a mixture of long chain aliphatic alcohols and carboxylic acids, was isolated from D. communis and 3b-O-acetylaleuritolic acid from D. villosa var. villosa.


Sujets)
Antibactériens , Candida albicans , Drosera , Bactéries à Gram négatif , Bactéries à Gram positif , Tests de sensibilité microbienne , Extraits de plantes
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