[Problem] Provided is a compound which is useful as an agent for treating trichophytosis, protozoan infection and/or Pneumocystis pneumonia. [Means for Solution] Capnodiaceae strain No. 339855 was collected and a polyketide compound was isolated from the cultural solution thereof. It was confirmed that the polyketide compound or a salt thereof has a potent anti- Trichophyton activity and is useful as a pharmaceutical, particularly as an agent for treating trichophytosis, thereby completing the present invention. A cyclic compound of the present invention or a salt thereof may be used as agent for preventing or treating trichophytosis, protozoan infection and/or Pneumocystis pneumonia (formerly: carinii pneumonia).
