Dryopteris crassirhizoma

Dryopteris crassirhizoma is a fern species in the genus Dryopteris. It is an element (Traditional: 貫眾, Simplified: 贯众) of the Yupingfeng Asian soup formulation derivative. The acylphloroglucinols (flavaspidic acids) isolated from D. crassirhizoma show in vitro antibacterial and fatty acid synthase inhibitory activity. Also, the constituents sutchuenoside A and kaempferitrin have in vivo antiparasitic activity.