[{"from": "human", "value": "Synthesize a molecule that matches the given characteristics. The molecule is an alpha-amino acid zwitterion that is 2-aminoheptanoic acid 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 a 2-aminoheptanoic acid."}, {"from": "gpt", "value": "[C][C][C][C][C][C][Branch1][=Branch1][C][=Branch1][C][=O][O-1][NH3+1]"}]