[{"from": "human", "value": "Based on the given information, design a molecule that meets the desired specifications. The molecule is a peptide anion obtained by deprotonation of the three carboxy groups of N-acetyl-Asp-Glu; major species at pH 7.3. It is a conjugate base of an Ac-Asp-Glu."}, {"from": "gpt", "value": "[C][C][=Branch1][C][=O][N][C@@H1][Branch1][#Branch1][C][C][=Branch1][C][=O][O-1][C][=Branch1][C][=O][N][C@@H1][Branch1][Branch2][C][C][C][=Branch1][C][=O][O-1][C][=Branch1][C][=O][O-1]"}]