[
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    "microspecies": [
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        "id": "-2_7",
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        "id": "-4_1",
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        "id": "-3_2",
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        "smiles": "O=C([O-])CC[C@H](C(=O)[O-])[NH+](CC(=O)[O-])CC(=O)[O-]",
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        "id": "-1_1",
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        "id": "-1_4",
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        "id": "-1_7",
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        "smiles": "O=C([O-])CN(CC(=O)O)[C@H](CCC(=O)O)C(=O)O",
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    ],
    "macro_pka_values": [
      {
        "pka_value": 2.7,
        "charge_state_pre": 0,
        "charge_state_post": -1,
        "data_source": "IUPAC digitized pKa"
      },
      {
        "pka_value": 4.8,
        "charge_state_pre": -2,
        "charge_state_post": -3,
        "data_source": "IUPAC digitized pKa"
      },
      {
        "pka_value": 9.66,
        "charge_state_pre": -3,
        "charge_state_post": -4,
        "data_source": "IUPAC digitized pKa"
      },
      {
        "pka_value": 2.1,
        "charge_state_pre": -1,
        "charge_state_post": -2,
        "data_source": "IUPAC digitized pKa"
      }
    ]
  }
]