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        "smiles": "[C@@H]([C@H](C(=O)[O-])O)(C(=O)[O-])O.[Ca+2]",
        "formula": "C4H4O6.Ca",
        "atropisomerism": "No",
        "charge": 0,
        "count": 1,
        "stereochemistry": "ABSOLUTE",
        "defined_stereo": 2,
        "ez_centers": 0,
        "molecular_weight": "188.1492",
        "optical_activity": "UNSPECIFIED",
        "references": [
          "85c82f65-1d94-49cb-a818-201fb06387c9",
          "10b4d77e-e287-4228-9415-68c4fc5a47b7"
        ],
        "stereo_centers": 2
      },
      "unii": "O6I5B26XA7"
    }
  ]
}