The molecule is a zwitterion resulting from the transfer of a proton from the carboxy group to the amino group of N-[(2S)-2-aminobutanoyl]glycine. The major species at pH 7.3. It is a tautomer of a N-[(2S)-2-aminobutanoyl]glycine.
2-[[(2S)-2-azaniumylbutanoyl]amino]acetate