Distinction between glycosylamines and amadori products by mass spectrometry of their trimethylsilyl derivatives

The TMS-ethers of four glycosylamines and seven Amadori compounds have been investigated by electron impact mass spectrometry. The mass spectra of glycosylamine-TMS derivatives and of their isomeric Amadori rearrangement products are quite characteristic. The two types of compounds can be distinguished by a few characteristic peaks.