Preussiate, a new urease inhibitory chalcone from Pax.

The phytochemical investigation of the aqueous methanolic extract of the aerial parts of led to the isolation of a new chalcone preussiate () along with 10 other compounds including xanthomicrol (), cholestan-3-one (), arjunolic acid (), tormentic acid (), ursolic acid (), betulin (, lupeol (), p-hydroxybenzoic acid (), isovanillin () and vanillic acid (), being reported for the first time from this plant. Their structures were established by spectroscopic techniques including 2D NMR spectroscopy. All the isolates were subjected to the biological screening but only showed antioxidant and urease inhibitory properties.