Figure 2

(a) Chemical transformation of L-glutamine into pyroglutamic acid and 3- or α-amino glutarimide upon autoclaving at 121°C and 15 psi (b) Key HMBC of α-amino glutarimide.

(a) Chemical transformation of L-glutamine into pyroglutamic acid and 3- or α-amino glutarimide upon autoclaving at 121°C and 15 psi (b) Key HMBC of α-amino glutarimide.