Metabolites of the higher fungi.Part 33.~1 Grammicin,a novel bicylclic C_7H_6O_4 furanopyranol from the fungus Xylaria grammica (Mont.)Fr.

摘要

Grammicin 1 from X-rylaria grammica is identified as 4-hydroxy-4H-furo[2,3-b]pyran-2(7aH)-one by chemical and physical methods.4-Oxo-4H-pyran-3-acetic acid (#gamma#-pyrone-3-acetic acid) 2 is a co-metabolite and the conversion of 1 into 2 discussed.