Metabolites of the Higher Fungi. Part 33. Grammicin, a novel bicyclic C7H6O4 furanoppyranol from the fungus Xylaria grammica (Mont) Fr.
NoGrammicin 1 from Xylaria grammica is identified as 4-hydroxy-4H-furo[2,3-b]pyran-2(7aH)-one by chemical and\ud
physical methods. 4-Oxo-4H-pyran-3-acetic acid (¿-pyrone-3-acetic acid) 2 is a co-metabolite and the conversion of 1\ud
into 2 is discussed
Fungi, Metabolites, Grammicin, Higher Fungi
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