A study on the biosynthesis of hygrophorone B12 in the mushroom Hygrophorus abieticola reveals an unexpected labelling pattern in the cyclopentenone moiety

The biosynthesis of the cyclopentenone derivative hygrophorone B12 in the mushroom Hygrophorus abieticola Krieglst. ex Gröger & Bresinsky was investigated by feeding experiments in the field using 13C labelled precursors.