p. 2323 - 2327
(1985)ethyl Bromopyruvate
N-(benzyloxycarbonyl)-L-γ-amino-γ-(thiocarbamoyl)butyramide
(S)-methyl 5-amino-4-{[(benzyloxy)carbonyl]amino}-5-oxopentanoate
N-benzyloxycarbonyl-L-isoglutamine
(S)-methyl 4-{[(benzyloxy)carbonyl]amino}-4-cyanobutanoate