From mycelial cultures of Oudemansiella mucida a crystalline optically active antibiotic, oudemansin (2), has been isolated; its structure is closely related to strobilurin A (1). The relative configuration of oudemansin have been determined by X-ray analysis. The antibiotic exhibits strong antifungal properties and inhibits respiration in fungi, cells of the ascitic form of EHRLICH carcinoma, and rat liver mitochondria.
