Ammoxidation of d-glucose at 70 °C, 100 °C,
and 140 °C: Kinetics of the formation of 2-(tetrahydroxybutyl)-pyrazine
derivatives with different chain lengths of the substituents in 5(6)-position
(isobar 0.2 MPa O2). Derivatives with same chain length
are grouped together. Legend: solid black squares, C0; solid black
circles, C1; solid gray triangles, C2; open white circles, C3; open
white squares, C4.