From the leaves of V. guianensis (Guttiferae), collected in Brasil, several secondary metabolites were isolated: lupeol, ß-amyrin, ß-sitosterol, (-) epicatechin, procyanidin B2 and vismione A (prenylated anthranoid). This last compound underwear rearrangement to the corresponding anthraquinone and bianthrones during chromatographic purification.