Fumarprotocetraric acid is a chemical compound with the chemical formula . It is a secondary metabolite produced by a variety of lichens.
Fumarprotocetraric acid is mainly known for its occurrence in Iceland moss (Cetraria islandica), where it is present in a mass fraction of 1âÂÂ2% (dried thallus).
In addition, fumarprotocetraric acid has been detected in many other lichens, including:
Fumarprotocetraric acid has antibacterial activity. It also induces an immunostimulating effect in vitro by triggering the formation of hydrogen peroxide. Furthermore, cytotoxicity against two cancer cell lines has been demonstrated.