| isolation and characterization of an antiviral flavonoid from waldsteinia fragarioides. | the antiviral agent in a fraction from waldsteinia fragarioides (rosaceae) was purified using bioassay-guided fractionation of activity against herpes simplex type 1 virus. structural eluciation by instrumental methods identified the active component to be the known flavonoid glycoside, isoquercitrin (3,3',4',5,7-pentahydroxyflavone-3 beta-o-glucoside), which had not previously been shown to possess antiviral activity. | 1992 | 1333516 |