Clitocybe subilludens

Atromentin (13) is a key intermediate for further conversions, e.g. to more highly hydroxylated terphenylquinones and to pulvinic acids (see Section 2.1.3). Whereas polyporic acid (11) and ascocorynin (12) have not been observed as co-metabolites of more highly hydroxylated terphenylquinones, atromentin or its derivatives often co-occur with cycloleucomelone (14) (e.g. in Paxillus and Anthracophyllum) and with thelephoric acid (16) (e.g. in Hydnellum). In cultures of Omphalotus subilludens ( = Clitocybe subilludens) the relative proportion of atromentin to thelephoric acid decreases with ageing, which provides a strong indication that thelephoric acid is derived from atromentin (637). 

Sullivan, G., and W.L. Guess Atromentin A Smooth Muscle Stimulant in Clitocybe subilludens. Lloydia 32, 72 (1969). 

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