Metabolites of the higher fungi. Part 31.1 Longianone, a C7H6O4 spiro bicyclic lactone from the fungus Xylaria longiana (Rehm.)
Abstract
Longianone 1 from Xylaria longiana is identified as 1,7-dioxaspiro[4,4]non-2-ene-4,8-dione by chemical and physical methods. The possible biosynthetic origin is discussed.