The methanolic extract of the stem bark of Lafoensia pacari (Lythraceae) sh
owed free radical scavenging activity in the diphenyl picryl hydrazyl radic
al (DPPH) decoloration assay and inhibited the enzyme xanthine oxidase 'in
vitro'. Bioassay-guided isolation led to ellagic acid (EA) as the main acti
ve compound of Brazilian and Paraguayan collections of the plant. (C) 2000
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