The molecule is an N-acyl-L-alpha-amino acid anion that is the conjugate base of N-acetyl-L-methionine sulfoximine, obtained by deprotonation of the carboxy group; major species at pH 7.3. It is a conjugate base of a N-acetyl-L-methionine sulfoximine.
(2S)-2-acetamido-4-(methylsulfonimidoyl)butanoate