N2-Carboxy-glutamine N-Benzyl Ster-13C5; L-N2-Carboxyglutamine N2-Benzyl Ster-13C5; (Benzyloxycarbonyl)glutamine-13C5; Carbobenzoxy-L-glutamine-13C5; N-(Benzyloxycarbonyl)-L-glutamine-13C5; N-(Benzyloxycarbonyl)glutamine-13C5; N-Carbobenzoxy-L-glutamine-13C5; N2-Benzoxycarbonyl-L-glutamine-13C5; N2-Benzyloxycarbonyl-L-glutamine-13C5; N2-Carbobenzoxy-L-glutamine-13C5; SC 186903-13C5; Nα-Benzyloxycarbonyl-L-glutamine-13C5