tert-butyl N2-[(benzyloxy)carbonyl]-N1-methyl-L-glutaminate

p-[N-methyl-N-(trifluoroacetyl)amino]benzoyl chloride

(S)-4-Amino-4-methylcarbamoyl-butyric acid tert-butyl ester

(S)-4-(4-Methylamino-benzoylamino)-4-methylcarbamoyl-butyric acid tert-butyl ester

(S)-4-Methylcarbamoyl-4-{4-[methyl-(2,2,2-trifluoro-acetyl)-amino]-benzoylamino}-butyric acid tert-butyl ester