Secondary metabolites of Ulocladium chartarum. Ulocladols A and B — New phytotoxins of terpenoid nature

Ulocladols A and B — new exometabolites having a mixed sesquiterpenoid-polyketide nature that are structurally close to the host-specific toxins ofAlternaria citri — have been isolated from the deuteromyceteUlocladium chartarum. Both substances inhibit the growth of cotton seeds.