(2S)-2-azaniumyl-4-oxobutanoate (2S)-2-azaniumyl-4-oxo-butanoate (2S)-2-ammonio-4-oxobutanoate (2S)-2-ammonio-4-keto-butyrate nchembio842-comp20 2-AMMONIO-4-OXOBUTANOATE AS2 ASPARTATE SEMIALDEHYDE (2S)-2-amino-4-oxobutanoic acid (2S)-2-amino-4-oxo-butanoic acid (2S)-2-amino-4-keto-butyric acid CHEBI:18051 C00441