Pyrones. VIII. Biosynthetic investigations of the fungal metabolite phacidin

Abstract
Biosynthetic feeding experiments [using Poteboniamyces balsamicola] with singly and doubly 13C-labeled acetate show that phacidin (4-methoxy-6-nonanoyl-2H-pyran-2-one-3-carboxaldehyde) is formed from a heptaketide precursor. A similar feeding with sodium 13C-formate showed that the methoxyl and aldehyde carbons are derived from the 1-carbon pool.