A new arylnaphthalene lignan, 9-(1,3-benzodioxol-5-yl)-4,5,6, 7-tetramethoxynaphtho[2,3-C]furan-1(3H)-one (5-methoxyjusticidin A, 1), was isolated from a Et2O extract of the wood of Protium unifoliolatum. The structure of 1 was determined by both spectroscopic and X-ray crystallographic methods.
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.
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