The phenolic material of chaga (Poria obliqua) sporophores is examined by degradations, methylation studies, and spectroscopic techniques, and is a polymer formed by oxidative polymerisation, in situ, of lignin breakdown products translocated from the host timber. The polymer sub-units are shown to be typical of the phenolics produced by white rot of hardwoods.
J. D. Bu'Lock and D. C. Walker, J. Chem. Soc. C, 1967, 336 DOI: 10.1039/J39670000336
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