Filicin is a chemical compound that has been isolated from ferns of the genus Dryopteris.

It has been isolated from the male fern (Dryopteris filix-mas).

[1] Filicin has been studied for its anthelmintic activity.

[2] A variety of chemically related compounds, sometimes referred to collectively as filicins, have also been isolated from ferns.

Chemical analysis of filicins in fern extracts can assist in determining taxonomy.