(2S)-2-amino-3-oxobutanoic acid (2S)-2-amino-3-oxo-butanoic acid (2S)-2-amino-3-keto-butyric acid (S)-2-Amino-3-oxobutanoic acid C03508 L-2-Amino-3-oxobutanoic acid 2-AMINO-3-KETOBUTYRIC ACID AKB 2S-amino-3-oxo-butanoic acid LMFA01060172