In situ mass spectrometry monitoring of fungal cultures led to the identification of four peptaibols with a rare threonine residue

In situ mass spectrometry screening of fungal cultures for peptaibols led to the discovery of four threonine-containing compounds from Nectriopsis Maire (Bionectriaceae) strain MSX53554. The culture was fermented on a larger scale for isolation and characterization studies.238