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Xylaral, a Hydroxyphthalide Derivative from Fruiting Bodies of Xylaria polymorpha (Ascomycetes) Fruiting bodies of Dead Man's Fingers, Xylaria polymorpha, contain a hydroxyphthalide derivative, xylaral (1), which exhibits a violet colour reaction with aqueous ammonia. 1 is a homologue of cyclopaldic acid (5) with a C14‐side chain containing an enone moiety.
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Gunawan et al. (1990) studied this question.
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