Abstract
Mass spectra of the N-salicylidene derivatives of twenty aminosugars and related compounds including mono- and diaminosugars, monoaminoalcohols and diaminocyclitol were studied. The spectra were characterized by the appearance of strong molecular ion peaks, most of them being the base peak. Fragmentation of the N-salicylidene aminosugars was discussed in terms of the structures, in particular, the substituted positions of amino groups, and compared with fragmentation of the parent free aminosugars.