Crude extracts were extracted from Sophra japonica L.with 75 % alcohol.Rutin was obtained from the crude extracts by alkine extraction and acid precipitation.

用75%乙醇取了槐花米中具有活性的粗,然后通过碱法从该粗中取了芦丁,并制备了芦丁的水解产槲皮素。