There is great effect on the yield of hypericin by the solvent, proportion of solvent and time, and the content in root, stem, leaf and fruit is different.

• 不同的溶剂及配比、不同的提取时间对金丝桃蒽酮素的产率有着显著的影响,其在元宝草的根,茎,叶,果实中的含量也各不相同。