Polyporus tumulosus

In Polyporus tumulosus, the pigment (245) co-occurs with hydroxy-lated phenylacetic acids 173, 535) from which it may be derived biosyn-thetically. In Serpula lacrimans and in Paxillus statuum the formation of (245) by degradation of a pulvinic acid may be suggested. 

Ralph, B.J., and A. Robertson The Chemistry of Fungi XIV. 2 4 5-Trihydroxy-phenylglyoxylic Acid from Polyporus tumulosus Cooke. J. Chem. Soc. (London) 1950, 3380. 

Metab. of Polyporus tumulosus and Pseudomonas ovalis. Cryst. (CgHg). Mp 127°. 

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