Résumé
6-
O-Demethyl nectriachrysone, a new heptaketide-derived polyene, has been isolated from a mutant of the fungus
Nectria haematococca. This product was identified by comparing its physicochemical data with those of the previously reported nectriachrysone, and by dehydration into a γ-pyrone. 6-
O-Demethyl nectriachrysone is the earliest known metabolite in the biosynthetic pathway leading from acetate to the naphthopyranones of the fusarubin type.