[{"from": "human", "value": "Design a molecule that meets the criteria outlined in the description. The molecule is an amino dicarboxylic acid that is glycine in which one of the hydrogens attached to the nitrogen is substituted by a carboxymethyl group. It has a role as a chelator. It is a glycine derivative, an amino dicarboxylic acid and a non-proteinogenic alpha-amino acid. It is a conjugate acid of an iminodiacetate."}, {"from": "gpt", "value": "[C][Branch1][=Branch1][C][=Branch1][C][=O][O][N][C][C][=Branch1][C][=O][O]"}]