Biosynthetic Study of Chloromonilicin, a Growth Self-inhibitor Having a Novel Lactone Ring, from Monilinia fructicola

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The biosynthetic route for chloromonilicin, an antifungal substance from cherry rot fungus, was investigated using deuterium-labeled precursors. The incorporation of synthetic deuterium-labeled moniliphenone into chloromonilicin and into its xanthone precursor, 4-chIoropinselin, was confirmed by ¹H-NMR spectrometry.