“…Pyrazines are aromatic compounds that can be caused by the Maillard reaction in several foods (Maga, 1982;Flament, 1989), through extrusion cooking (Ames et al, 1997;Bredie et al, 1998), roasting (Flament, 1989;Beal and Mottram, 1994), or by other thermic processes, as well as in some cases by fermentation (Owens et al, 1997). Some pyrazines (nine) have also been previously detected in smoke flavorings (Maga and Chen, 1985;Chen and Maga, 1995); however, most of these do not coincide with those found in the LSS sample. The main properties of this kind of compound are organoleptic, described in general as pungent, nutty, burnt, roasted, grassy, and, in some cases, butterscotch.…”