Two New Dihydroflavanoids from Patrinia villosa Juss

Two new dihydroflavonoids were obtained from the traditional Chinese medicinal herb Patrinia villosa Juss. Their structures were elucidated as (2S)-5, 7, 2', 6'-tetrahydroxy-6, 8-di (γ, γ-dimethylallyl) flavanone (1) and (2S)-5, 7, 2', 6'-tetrahydroxy-6-lavandulylated flavanone (2) by spectroscopic methods including UV, IR, HR-TOF-MS, 1D NMR and 2D NMR techniques.