Tillman's reagent is reduced by 1-deoty p toluidino D fructose (an amadori rearangement product of N toluidinoglucoside) in alkaio medium. One mole of this isoglucoseamine reduced 2 moles of Tillman's reagent at pH 11:30-13:00 medium. The structure of this isoglucoseamine in the reaction was studied by using of polarograph and IR and UV spectroscopic method, but conclusive results were not obtained. A chart of S: MON which was mentioned in Chem. Ber. (95, 1003 1962) is very interesting for the discussion of a cause. This chart proposed a result for the path of this priblem.