Biflavanones, Chalconoids, and Flavonoid Analogues from the Stem Bark of Ochna holstii

Two new biflavanones (1 and 2), three new bichalconoids (3–5), and 11 known flavonoid analogues (6–16) were isolated from the stem bark extract (CH3OH–CH2Cl2, 7:3, v/v) of Ochna holstii. The structures of the isolated metabolites were elucidated by NMR spectroscopic and mass spectrometric analyses. The crude extract and the isolated metabolites were evaluated for antibacterial activity against Bacillus subtilis (Gram-positive) and Escherichia...