New Oxidized 4-Oxo Fatty Acids from Hygrophorus Discoxanthus:

The results are reported from the first investigation of the secondary metabolites of the basidiomycete Hygrophorus discoxanthus (Fr.) Rea. Five new oxidized 4-oxo fatty acids (C16, C18) were isolated from the fruiting bodies and their structures established on the basis of their spectroscopic data and an ozonolysis experiment. Preliminary data indicate a moderate fungicidal activity, suggesting a possible function of these acids as chemical deterrents against mushroom parasites and predators