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 3β-acetoxy-olean-12-ene-28-al and β-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.
Moraceae; wood residues; density; oleanane triterpene
