科研之友
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摘要
previous phytochemical studies on residues of pau-rainha＊s heartwood (brosimum rubescens) showed a high content of xanthyletin, a coumarin with biological potential. continuing our studies with sawdust of this species, this work relates the basic density, isolation and identification of the triterpene 3汕-acetoxy-olean-12-ene-28-al and 汕-sitosterol in n-hexane and meoh extracts of the plant∩s sapwood. the structure of the triterpene was determined on the basis of nmr spectra in 1d (1h and 13c) and 2d (hsqc and hmbc) and comparison with literature data. the basic density found for sapwood was 0.58 g cm-3, that even so is inferior the one of heartwood, could be used in the confection of some products, also in marquetry techniques.
