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Two new flavonoids, (2 S)-3′,4′,5′-trimethoxyflavanone (1) and 2′-hydroxy-2,4-dimethoxy-4′- O-[( E)-3,7-dimethyl-2,6-octadienyl]chalcone (2), together with a known pterocarpene, flemichapparin B (3), and a known rotenoid, dehydrodeguelin (4), were isolated from the seeds of Derris scandens. Their structures were determined by means of extensive 1D and 2D NMR spectral studies.

Two New Flavonoids from the Seeds of Derris scandens