Raymond L. Edwards, Derek J. Maitland, Claire L. Oliver, Michael S. Pacey, Len Shields and Anthony J. S. Whalley
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.