[{"from": "human", "value": "Use the given information to create a molecule that fulfills the desired purpose. The molecule is conjugate base of erythro-3-methyl-L-aspartic acid, major microspecies at pH 7.3."}, {"from": "gpt", "value": "[C][C@H1][Branch1][#Branch2][C@@H1][Branch1][=Branch1][C][=Branch1][C][=O][O-1][NH3+1][C][=Branch1][C][=O][O-1]"}]