Metabolites from the wood-rotting basidiomycete Hapalopilus mutans (Aphyllophorales)

Fruit bodies of the wood-rotting North American fungus Hapalopilus mutans p roduce a mixture of dihydroxybenzoic acids 1, dihydroxybenzoquinones 2 and a novel type of spirodiones, e.g. mutadione A (4a). All compounds carry lon g alkyl chains, which may be partially unsaturated. The structures of the m etabolites were established by spectroscopic methods.