[{"from": "human", "value": "Could you give me a brief overview of this molecule? [C][C][=Branch1][C][=O][O][C][C][C][Branch1][=Branch1][C][=Branch1][C][=O][O-1][NH3+1]"}, {"from": "gpt", "value": "The molecule is an alpha-amino acid zwitterion that is O-acetylhomoserine in which a proton has been transferred from the carboxy group to the amino group. It is the major species at pH 7.3. It is a tautomer of an O-acetylhomoserine."}]