Abstract
An orange pigment named echinotinctone was isolated from the wood-rotting polypores Echinodontium tinctorium and Pyrofomes albomarginatus. Its structure was elucidated as2, 6-dihydroxy-1, 8-dimethyl-3H-xanthen-3-one ( 1) on the basis of spectroscopic and chemical studies. 1 represents the first naturally occurring pigment with a simple fluorone chromophore. Echinotinctone ( 1) constitutes the first simple fluorone pigment from fungi. [Display omitted]
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