ChEBI: Sporidesmin A is an organic heteropentacyclic compound that has formula C18H20ClN3O6S2, produced by the saprophyte fungus Pithomyces chartarum. It is a mycotoxin responsible for the hepatogenous photosensitisation disease facial eczema in ruminants. It has a role as a mycotoxin and a Wnt signalling activator. It is an organic heteropentacyclic compound, an aromatic ether, an organochlorine compound, a secondary alcohol, a tertiary alcohol, a tertiary amino compound, an organic disulfide, a diketone and a cyclic ketone.