On the study of polyphenols from Fragaria ananassa fruit, we reported that some polyphenols showed inhibition of metabolic enzyme, cytochrome P450. Continuous study of health effects of F. ananassa fruit, we isolated a new quercetin glycoside, flagarin, quercetin-3-O- β-glucuronyl- (2→1)- β-D-xyloside along with ten known compounds. Those compounds showed inhibitory activity of fat accumulation in rat white adipocyte. Among the isolated compounds, strictinin and the new compound, flagarin showed high inhibitory activity of fat accumulation in rat white adipocyte.
