Abstract A new flavone derivative named pachypodostyflavone (1), along with 8 known compounds (2–9) and a mixture of β-sitosterol stigmasterol were isolated from the stem bark Duguetia staudtii (Annonaceae), based on bioassay-guided fractionation. Their structures determined using high-resolution mass spectrometry NMR spectroscopic data, as well by comparison literature values their analogs. Se...