New Metabolites from Lentinus degener.

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Abstract
The present work describes the isolation and identification of 4-methoxy-6-hydroxy-2,5-toluquinone as a metabolic product of three out of four investigated strains of Lentinus degener; this pigment has not previously been recognized as a natural product. In two of the strains 4-methoxy-6-hydroxy-2,5-toluquinone was produced along with minor amounts of 4-methoxy-2,5-toluquinone. The quinonoid pigments were found to be formed by autoxidation of the corresponding hydroquinones, which could be isolated from young, pigment producing, L. degener cultures and were identified by thin-layer chromatography. The non-pigmented strain of the mould was shown to form small amounts of 6-methylsalicylic acid.