Antioxidant effects of diarylheptanoid derivatives from Alnus japonica on human LDL oxidation.

Two diarylheptanoids, oregonin (1) and hirsutanone (2), were isolated by bioassay-guided fractionation of the methanol extracts of the leaves of Alnus japonica Steud and their structures were elucidated from their spectroscopic data. Compounds 1 and 2 exhibited significant low-density lipoprotein (LDL)-antioxidant activities, e. g., thiobarbituric acid… CONTINUE READING