Two new flavanones, puguflavanone A [5,4′-dihydroxy-6-(1″,1″-dimethylprop-2-enyl)-2″’,2″'-dimethylpyrano-(5″’,6″’:7,8)flavanone] (1) and puguflavanone B [5,7,4′-trihydroxy-6-(1″,1″-dimethylprop-2-enyl)-8-(3-methylbut-2-enyl)flavanone] (2) were isolated from the ethyl acetate extract of the root bark of Baphia puguensis, together with four known compounds, erythrisenegalone (3), 3-methoxy-8,9-methylenedioxypterocarpene, alkyl trans-4-hydroxy-3-methoxycinnamate, and stigmasterol. Structures were established using NMR and MS techniques.
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