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Lambertellol C, a labile and novel biosynthetic congener of lambertellols A and B.

Lambertellol C (1), a labile biosynthetic congener of lambertellols A and B, was isolated from a fermentation broth of Lambertella sp. 1346 based on the diagnostic isotope patterns in the mass spectrum of a highly labeled sample. The CD spectrum of 1 indicated that this lambertellol analogue exists as a racemate. The mechanism for this racemization is discussed.