Content : minimum 2.5 per cent of flavonoids, expressed as hyperoside (C 21 H 20 O 12 ;M r 464.4) (dried drug).

• 本品（以干燥品计）所含黄酮以金丝桃苷（C 21 H 20 O 12 ）计，不得少于2.；5%25。