[{"from": "human", "value": "Based on the given information, design a molecule that meets the desired specifications. The molecule is an ammonium ion resulting from the protonation of the nitrogen atom of iminodiacetate. The major species at pH 7.3. It is an ammonium ion derivative and a dicarboxylic acid dianion. It is a conjugate acid of an iminodiacetate."}, {"from": "gpt", "value": "[C][Branch1][=Branch1][C][=Branch1][C][=O][O-1][NH2+1][C][C][=Branch1][C][=O][O-1]"}]