[{"from": "human", "value": "Create a molecule with the structure as the one described. The molecule is the conjugate base of 3-nitropropanoic acid; major species at pH 7.3. It is a conjugate base of a 3-nitropropanoic acid. It is a tautomer of a 3-aci-nitropropanoate."}, {"from": "gpt", "value": "[C][Branch1][#Branch1][C][N+1][=Branch1][C][=O][O-1][C][=Branch1][C][=O][O-1]"}]