The active fraction of an extract of the fungus Ceratocvstis fimbriata coffea, which is responsible for the canker disease of the coffee tree, provided 13 metabolites which come mainly from the polyketide pathway. In addition to the five isocoumarins previously described, eight further metabolites are reported. Some of the isolated compounds showed necrotic symptoms on the coffee tree at concentrations of ca 1-4 x 10 3 M. Previously unpublished spectroscopic data of some of the isolated compounds are reported.