Recebido em 24/8/08; aceito em 19/11/08; publicado na web em 2/4/09 SALICYLATES ISOLATED FROM LEAVES AND STEMS OF Salix martiana Leyb. (SALICACEAE). Salix martiana Leyb. is an endemic species from the Amazon river floodplain areas (varzeas), of the State of Amazonas. Stems and leaves were extracted with dichloromethane, methanol and hydro-alcohol and these extracts were fractionated by using conventional chromatographic techniques. The major substances isolated, salicin and trichocarposide (6-0-p-coumaroyl salicin), were determined through analyses of NMR 1D (1 H and 13 C) and NMR 2D (gHSQC and gHMBC). These compounds were isolated for the first time in Salix martiana Leyb. (Salicaceae). The percentage of these compounds in S. martiana is very high. The extracts were analyzed for their DPPH antioxidant capacity and the methanolic from the leaves and the hydro-alcoholic from the stems were the more active.
RESUMO -Dos extratos etéreo e etanólico da casca da madeira de Protium paniculatum Engl. foram isolados á e β-AMIRINA (0,012%), β-sitosiero! e estigmasterol (0,003%) e o ácido 3,3'-di-0-metilelágico (0,093%0). A presença do ácido 3,3',4-tri-0-metileIágico foi postulada com base na análise do espectro de massas.Palavras-chave: Burseraceac, Protium, terpenoídes, ácido 3,3'-di-o-metilelágico e ácido 3,3',4-tri-o-metilelágico.
Chemical Constituents of Protium paniculatum (Burseraceae).SUMMARY -á-e β-myrin (0,012%), β-sitosterol and stigmasterol (0.003%),3,3'-di-0-methylellagic (0.093%) acid were isolated from the bark wood of Protium paniculatum.The presence of 3.3',4-tri-0-methylellagic acid was postulate on the of mass spectral analyses.
Do cerne de Guarea carinata foi isolado como principal constituinte um triterpeno di-acetilado (I). do grupo dos protolimonóides, derivado do apo-tirucalol e que mostrou atividade no controle biológico das larvas de Urbanus acawoioa(WILLIAMS, R. C, 1926) (Lepidoptera Hesperiidac).
RESUMO -Dos extratos etéreo e etanólico da casca da madeira de Protium paniculatum Engl. foram isolados a-e β-amirina (0,012%), β-sitosterol e estigmasterol (0,003%) e o ácido 3,3'-di-O-metilelágico (0,093%0). A presença do ácido 3,3',4-tri-O-metilelágico foi postulada com base na análise do espectro de massas.Palavras-chave: Burseraceae, Protium, terpenóides, ácido 3,3'-di-0-metilelágico e ácido 3,3',4-tri-O-metilelágico.
Chemical Constituents of Protium paniculatum (Burseraceae).SUMMARY -α-and β-amyrin (0,012%), β-sitosterol and stigmasterol (0.003%),3,3'-di-Omethylellagic acid (0.093%) were isolated from the bark wood of Protium paniculatum. The pres ence of 3,3',4-tri-O-methylellagic acid was postulate on the basis of mass spectral analyses.
RESUMO -Da casca da madeira de Guarea trichilioides foram isoladas e identificadas através de métodos espectrométricos as antraquinonas crisofanol e fisciona e das sementes o limonóide 7-desacetoxi-7-hidroxiazadirona. Da fração lipofílica das sementes foram ainda identificados por co-injeçao de padrões, através de cromatografia gasosa os ácidos esteárico, palmítico e linolênico.Palavras-Chave: Meliaceae, Guarea trichilioides, Limonóides, Antraquinonas. Wiley/NBS.
Chemical Study of Fruits and Steam Bark of Guarea trichilioides (Meliaceae).ABSTRACT -In this paper we related the identification and isolation of stearic, linolenic and palmitic acids and the isolation and structural determination of the 7-desacetoxy-7-hidroxyazadirone present in the hexan extract of the fruits of Guarea trichilioides. From the chloroform extrat of steam bark were isolated and identificated the antraquinones: chrysophanol and physcion.
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