Abstract
High resolution, linked-field scan and neutral loss experiments have indicated that 1-[(2′-carboxyl)pyrrolidinyl]-1-deoxy- d-fructose (proline Amadori product) followed two main pathways of fragmentation under electron impact conditions; one initiated by the ring oxygen and the other by the amino acid nitrogen, producing two well stabilized fragment ions; oxonium and imminium ions. In addition, ortho-elimination reactions initiated by O- or N-centred radical sites can produce the most intense peaks and diagnostically important ions for the identification of Amadori products.
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