.alpha.-N-Acetyl-L-glutamine 2490-97-3 Aceglutamid Aceglutamide Acetylglutamine Glutamine, N2-acetyl-, L- L-Glutamine, N2-acetyl- N(sup2)-Acetyl-L-glutamine N-Acetyl-L-glutamine N2-Acetyl-L-glutamine NSC186896