(4S)-4-amino-5-oxopentanoic acid (4S)-4-amino-5-oxo-pentanoic acid (4S)-4-amino-5-keto-valeric acid 68462-55-5 (S)-4-amino-5-oxopentanoic acid 4-AMINO-5-OXO-PENTANOIC ACID CHEBI:15757 C03741 Pentanoic acid, 4-amino-5-oxo-, (S)- (S)-4-amino-5-oxopentanoate L-Glutamate 1-semialdehyde