{
  "meta": {
    "disclaimer": "Do not rely on openFDA to make decisions regarding medical care. While we make every effort to ensure that data is accurate, you should assume all results are unvalidated. We may limit or otherwise restrict your access to the API in line with our Terms of Service.",
    "terms": "https://open.fda.gov/terms/",
    "license": "https://open.fda.gov/license/",
    "last_updated": "2025-09-19",
    "results": {
      "skip": 0,
      "limit": 1,
      "total": 1
    }
  },
  "results": [
    {
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          "uuid": "8edbc617-be18-4b99-bcc3-1bc54ce8c18f",
          "code": "2RAF5TL6V2",
          "type": "PRIMARY",
          "code_system": "FDA UNII"
        },
        {
          "uuid": "8594b7e8-ac19-558a-e2aa-cfca3b55e586",
          "code": "DTXSID30427741",
          "type": "PRIMARY",
          "url": "https://comptox.epa.gov/dashboard/chemical/details/DTXSID30427741",
          "code_system": "EPA CompTox",
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          "code": "5571-36-8",
          "type": "PRIMARY",
          "url": "https://commonchemistry.cas.org/detail?cas_rn=5571-36-8",
          "code_system": "CAS",
          "references": [
            "7343c042-15f3-4fae-9c61-44935e5ff034"
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        {
          "uuid": "dcb29d66-251e-37af-541d-a879364a5beb",
          "code": "7076399",
          "type": "PRIMARY",
          "url": "https://pubchem.ncbi.nlm.nih.gov/compound/7076399",
          "code_system": "PUBCHEM",
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          "code": "300000052936",
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            "53e1fa40-21b1-e117-76a5-adb690657d28"
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      "substance_class": "chemical",
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          "uuid": "f3d3bcef-c599-42e0-91f1-a26e2e3dcfa4",
          "name": "3,3-(Ethylenedioxy)estra-5(10),9(11)-dien-17-one",
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          "name": "Estra-5(10),9(11)-diene-3,17-dione, cyclic 3-(1,2-ethanediyl acetal)",
          "stdName": "ESTRA-5(10),9(11)-DIENE-3,17-DIONE, CYCLIC 3-(1,2-ETHANEDIYL ACETAL)",
          "type": "sys",
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        {
          "uuid": "95f5c2b4-e15f-47cc-a6dd-7b40ec184165",
          "name": "Estradiene dione-3-keta",
          "stdName": "ESTRADIENE DIONE-3-KETA",
          "type": "cn",
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          "preferred": false,
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        {
          "uuid": "7292a0f2-0660-446b-8425-8749cc5a338f",
          "name": "Ethylene deltenone",
          "stdName": "ETHYLENE DELTENONE",
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        {
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          "citation": "STN",
          "doc_type": "STN (SCIFINDER)",
          "public_domain": true,
          "tags": [
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          "doc_type": "EPA",
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        },
        {
          "uuid": "53e1fa40-21b1-e117-76a5-adb690657d28",
          "citation": "SMS",
          "doc_type": "EMA LIST",
          "public_domain": true
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      "definition_type": "PRIMARY",
      "moieties": [
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          "id": "73bb1cf4-abfe-4a9f-af73-e81405b81c11",
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          "smiles": "C[C@@]12CC=C3C4=C(CC[C@@]3([H])[C@]2([H])CCC1=O)CC5(CC4)OCCO5",
          "formula": "C20H26O3",
          "atropisomerism": "No",
          "charge": 0,
          "count": 1,
          "stereochemistry": "ABSOLUTE",
          "count_amount": {
            "type": "MOL RATIO",
            "average": 1,
            "units": "MOL RATIO",
            "uuid": "cb0e7bdf-7332-460b-a6fa-375d06be4e5f"
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          "defined_stereo": 3,
          "ez_centers": 0,
          "molecular_weight": "314.4194",
          "optical_activity": "UNSPECIFIED",
          "stereo_centers": 3
        }
      ],
      "definition_level": "COMPLETE",
      "uuid": "9fee214b-c473-4ef2-bb1f-e2084b7aa162",
      "version": "9",
      "structure": {
        "id": "e927a467-922c-4044-ba8c-c192ad98a3c7",
        "molfile": "Estra-5(10),9(11)-dien-3-one, 17-hydroxy-17-(1-propyn-1-yl)-, cyclic 1,2-etha...\n   JSDraw203242314102D\n\n 25 29  0  0  1  0              0 V2000\n   28.5921   -4.1190    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0\n   28.5921   -7.2286    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0\n   27.2318   -7.9925    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0\n   28.5921   -5.6686    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0\n   30.0702   -7.7284    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0\n   25.8901   -7.1964    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0\n   27.2318   -9.5524    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0\n   30.1003   -5.2042    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0\n   27.2691   -4.8725    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0\n   31.0020   -6.4772    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0\n   24.5298   -7.9602    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0\n   25.8901   -5.6365    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0\n   25.8528  -10.3163    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0\n   24.5298   -9.5202    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0\n   23.1882   -7.1641    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0\n   23.1509  -10.2841    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0\n   21.8092   -7.9281    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0\n   21.8092   -9.4880    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0\n   20.3918   -8.8364    0.0000 O   0  0  0  0  0  0  0  0  0  0  0  0\n   21.6277  -11.0375    0.0000 O   0  0  0  0  0  0  0  0  0  0  0  0\n   19.3340   -9.9833    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0\n   20.0979  -11.3436    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0\n   29.3559   -8.5887    0.0000 H   0  0  0  0  0  0  0  0  0  0  0  0\n   28.3218   -9.1087    0.0000 H   0  0  0  0  0  0  0  0  0  0  0  0\n   30.4098   -4.0484    0.0000 O   0  0  0  0  0  0  0  0  0  0  0  0\n  4  1  1  1  0  0  0\n  2  3  1  0  0  0  0\n  2  4  1  0  0  0  0\n  2  5  1  0  0  0  0\n  2 23  1  6  0  0  0\n  3  6  1  0  0  0  0\n  3  7  1  0  0  0  0\n  3 24  1  1  0  0  0\n  4  8  1  0  0  0  0\n  4  9  1  0  0  0  0\n  5 10  1  0  0  0  0\n  6 11  1  0  0  0  0\n  6 12  2  0  0  0  0\n  7 13  1  0  0  0  0\n  8 10  1  0  0  0  0\n  9 12  1  0  0  0  0\n 11 14  2  0  0  0  0\n 11 15  1  0  0  0  0\n 13 14  1  0  0  0  0\n 14 16  1  0  0  0  0\n 15 17  1  0  0  0  0\n 16 18  1  0  0  0  0\n 17 18  1  0  0  0  0\n 18 19  1  0  0  0  0\n 18 20  1  0  0  0  0\n 19 21  1  0  0  0  0\n 20 22  1  0  0  0  0\n 21 22  1  0  0  0  0\n  8 25  2  0  0  0  0\nM  END",
        "smiles": "C[C@@]12CC=C3C4=C(CC[C@@]3([H])[C@]2([H])CCC1=O)CC5(CC4)OCCO5",
        "formula": "C20H26O3",
        "atropisomerism": "No",
        "charge": 0,
        "count": 1,
        "stereochemistry": "ABSOLUTE",
        "defined_stereo": 3,
        "ez_centers": 0,
        "molecular_weight": "314.4194",
        "optical_activity": "UNSPECIFIED",
        "references": [
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        "stereo_centers": 3
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      "unii": "2RAF5TL6V2"
    }
  ]
}