A canthin-2,6-dione (1) was isolated from the ethanol extract wood of Simaba polyphylla (Cavalc.) Thomas colleted near Manaus. Compound 1 was previously isolated from S. multiflora, S. guianensis and S. cedron, this is the first occurrence in S. polyphylla.
Simaba polyphylla; Simaroubaceae; canthin-2; 6-dione