L-isoglutamine(4S)-4,5-diamino-5-oxo-pentanoic acid(4S)-4,5-diamino-5-oxopentanoic acid(4S)-4-amino-4-carbamoylbutanoic acid(S)-4,5-diamino-5-oxopentanoic acid4-amido-4-carbamoyl-butyric acid4-amino-L-glutaramic acidH-L-Glu-NH2L-glutamic acid alpha-amide