The molecule is an N-acyl-L-alpha-amino acid anion derived from N-carboxy-L-methionine(2-) by removal of a proton from each of the carboxy groups. Major species at pH 7.3. It is a dicarboxylic acid dianion and a N-acyl-L-alpha-amino acid anion. It is a conjugate base of a N-carboxy-L-methionine.
(2S)-2-(carboxylatoamino)-4-methylsulfanylbutanoate