[
  {
    "molid": "mol3042",
    "smiles": "CCCC(=O)OC(CC(=O)[O-])C[N+](C)(C)C",
    "microspecies": [
      {
        "id": "0_1",
        "charge": 0,
        "smiles": "CCCC(=O)O[C@H](CC(=O)[O-])C[N+](C)(C)C",
        "std_free_energy": -10.196715354919434,
        "relative_population": 1.0
      },
      {
        "id": "1_1",
        "charge": 1,
        "smiles": "CCCC(=O)O[C@H](CC(=O)O)C[N+](C)(C)C",
        "std_free_energy": -3.2661542892456055,
        "relative_population": 1.0
      }
    ],
    "macro_pka_values": [
      {
        "pka_value": 3.56,
        "charge_state_pre": 1,
        "charge_state_post": 0,
        "data_source": "OCHEM"
      },
      {
        "pka_value": 3.55999994277954,
        "charge_state_pre": 1,
        "charge_state_post": 0,
        "data_source": "QSARToolbox"
      }
    ]
  }
]