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Abstract
2-Acetamido-2-deoxy-O-β-D-galactopyranosides and 2-acetamido-2-deoxy-O-β-D-glucopyranosides of the representatives of the three classes of the ergot alkaloids, i.e., elymoclavine (1a) (clavines), chanoclavine (2a) (secoclavines) and ergometrine (3a)/ergometrinine (4a) (lysergic/iso-lysergic acid derivatives) were prepared via transglycosylation catalysed by β-N-acetylhexosaminidase from Aspergillus oryzae.