Common Pulvinic Acid Derivatives

Besides atromentic acid, xerocomic acid, and variegatic acid a number of less common pulvinic acid derivatives have been isolated from Basidiomycetes (Table 11). 

The fruiting bodies of Pulveroboletus auriflammeus collected in Japan contain a series of extensively methylated atromentic acid and xerocomic acid derivatives, several of them in chlorinated form 474). The presence of traces of a chlorinated xerocomic acid had been noted before in sporophores of Xerocomus chrysenteron 607). 

Isoxerocomic acid (84) and some of its derivatives are produced by cultures of Serpula lacrimans 89, 90). Variegatic acid (73) is also produced by this most destructive and insidious wood-rotting fungus and may be used for on-site detection by thin layer chromatography 125). 

A series of variegatic acid derivatives (93) to (95) specifically methylated at the 3-hydroxy group is formed in cultures of Hygrophoropsis 

Boletus subglobosus 281), Pulvero-boletus ravenelii [ca. 8%, dry weight] ThC P.frians 474) 

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Table 8. Occurrence of Common Pulvinic Acid Derivatives ...

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