{
  "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": [
    {
      "codes": [
        {
          "uuid": "83cac773-e893-4e67-a3a6-eabed5e2e59c",
          "code": "72928-35-9",
          "type": "PRIMARY",
          "url": "https://commonchemistry.cas.org/detail?cas_rn=72928-35-9",
          "code_system": "CAS",
          "references": [
            "2d4f6168-3bc6-44aa-bf0f-5ba596001593",
            "4e7227de-3621-4312-9008-0e654ed271ca"
          ]
        },
        {
          "uuid": "22478791-2758-4f1d-9e33-b33033a84251",
          "code": "277-069-0",
          "type": "PRIMARY",
          "url": "https://echa.europa.eu/substance-information/-/substanceinfo/100.070.041",
          "code_system": "ECHA (EC/EINECS)",
          "references": [
            "2d4f6168-3bc6-44aa-bf0f-5ba596001593"
          ]
        },
        {
          "uuid": "e5a74135-b19a-4ef5-a8a6-661a29f37dc5",
          "code": "166366",
          "type": "PRIMARY",
          "url": "https://pubchem.ncbi.nlm.nih.gov/compound/166366",
          "code_system": "PUBCHEM",
          "references": [
            "2d4f6168-3bc6-44aa-bf0f-5ba596001593"
          ]
        },
        {
          "uuid": "0931d845-398e-aee8-1252-57908e2ba656",
          "code": "DTXSID3072666",
          "type": "PRIMARY",
          "url": "https://comptox.epa.gov/dashboard/chemical/details/DTXSID3072666",
          "code_system": "EPA CompTox",
          "references": [
            "4c2ae7fc-b676-a757-4d04-6327deb4ceed"
          ]
        },
        {
          "uuid": "3b8295e6-f653-481f-8429-e59e02dadac8",
          "code": "PUA7GWY6FV",
          "type": "PRIMARY",
          "code_system": "FDA UNII"
        }
      ],
      "substance_class": "chemical",
      "names": [
        {
          "uuid": "95375abb-d45a-4091-9621-4fc141da6059",
          "name": "2-Butenoic acid, 3-methyl-, 3-methyl-3-buten-1-yl ester",
          "stdName": "2-BUTENOIC ACID, 3-METHYL-, 3-METHYL-3-BUTEN-1-YL ESTER",
          "type": "sys",
          "languages": [
            "en"
          ],
          "preferred": false,
          "references": [
            "4e7227de-3621-4312-9008-0e654ed271ca"
          ],
          "display_name": false
        },
        {
          "uuid": "c01e4b08-eb30-4a6b-aec4-8515f5c622a6",
          "name": "2-Butenoic acid, 3-methyl-, 3-methyl-3-butenyl ester",
          "stdName": "2-BUTENOIC ACID, 3-METHYL-, 3-METHYL-3-BUTENYL ESTER",
          "type": "sys",
          "languages": [
            "en"
          ],
          "preferred": false,
          "references": [
            "df043454-d36c-4755-b59e-4a017b904428"
          ],
          "display_name": true
        }
      ],
      "references": [
        {
          "uuid": "df043454-d36c-4755-b59e-4a017b904428",
          "citation": "CFSAN",
          "doc_type": "SRS",
          "public_domain": true,
          "tags": [
            "NOMEN"
          ]
        },
        {
          "uuid": "2d4f6168-3bc6-44aa-bf0f-5ba596001593",
          "citation": "SRS CODE IMPORT",
          "doc_type": "SRS",
          "public_domain": true,
          "document_date": 1493392076000,
          "tags": [
            "NOMEN"
          ]
        },
        {
          "uuid": "4c2ae7fc-b676-a757-4d04-6327deb4ceed",
          "citation": "WEBSITE",
          "url": "https://comptox.epa.gov/dashboard/dsstoxdb/results?utf8=%E2%9C%93&search=72928-35-9",
          "doc_type": "WEBSITE",
          "public_domain": true,
          "tags": [
            "NOMEN",
            "PUBLIC_DOMAIN_RELEASE"
          ]
        },
        {
          "uuid": "4e7227de-3621-4312-9008-0e654ed271ca",
          "citation": "STN",
          "doc_type": "STN (SCIFINDER)",
          "public_domain": true
        }
      ],
      "definition_type": "PRIMARY",
      "moieties": [
        {
          "uuid": "561ae29f-8e6f-4f11-ae36-6109e663d633",
          "id": "561ae29f-8e6f-4f11-ae36-6109e663d633",
          "molfile": "\n  Marvin  01132104292D          \n\n 12 11  0  0  0  0            999 V2000\n    0.0000   -1.2525    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0\n    0.7149   -0.8407    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0\n    0.7092   -0.0114    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0\n    1.4298   -1.2468    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0\n    2.1447   -0.8350    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0\n    2.8596   -1.2468    0.0000 O   0  0  0  0  0  0  0  0  0  0  0  0\n    3.5745   -0.8293    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0\n    3.5688    0.0000    0.0000 O   0  0  0  0  0  0  0  0  0  0  0  0\n    4.2894   -1.2411    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0\n    5.0043   -0.8236    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0\n    5.7192   -1.2354    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0\n    5.4161   -0.1087    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0\n  1  2  1  0  0  0  0\n  2  3  2  0  0  0  0\n  2  4  1  0  0  0  0\n  4  5  1  0  0  0  0\n  5  6  1  0  0  0  0\n  6  7  1  0  0  0  0\n  7  8  2  0  0  0  0\n  7  9  1  0  0  0  0\n  9 10  2  0  0  0  0\n 10 11  1  0  0  0  0\n 10 12  1  0  0  0  0\nM  END",
          "smiles": "C=C(C)CCOC(=O)C=C(C)C",
          "formula": "C10H16O2",
          "atropisomerism": "No",
          "charge": 0,
          "count": 1,
          "stereochemistry": "ACHIRAL",
          "count_amount": {
            "type": "MOL RATIO",
            "average": 1,
            "units": "MOL RATIO",
            "uuid": "a616436a-6e76-477e-8b68-e1b554dc499e"
          },
          "defined_stereo": 0,
          "ez_centers": 0,
          "molecular_weight": "168.2332",
          "optical_activity": "NONE",
          "stereo_centers": 0
        }
      ],
      "definition_level": "COMPLETE",
      "uuid": "dc4225f0-6371-4fd4-aeaa-7178ea003aff",
      "version": "7",
      "structure": {
        "id": "e8eb1864-fd56-4d4f-97b3-ed2086294a72",
        "molfile": "\n   JSDraw209082302032D\n\n 12 11  0  0  0  0              0 V2000\n   25.6619   -4.3186    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0\n   26.4419   -5.6696    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0\n   28.0019   -5.6696    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0\n   25.6619   -7.0206    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0\n   24.1020   -7.0206    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0\n   23.3220   -8.3714    0.0000 O   0  0  0  0  0  0  0  0  0  0  0  0\n   21.7620   -8.3714    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0\n   20.9821   -7.0206    0.0000 O   0  0  0  0  0  0  0  0  0  0  0  0\n   20.9821   -9.7224    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0\n   19.4221   -9.7224    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0\n   18.6421   -8.3714    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0\n   18.6421  -11.0734    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0\n  1  2  1  0  0  0  0\n  2  3  2  0  0  0  0\n  2  4  1  0  0  0  0\n  4  5  1  0  0  0  0\n  5  6  1  0  0  0  0\n  6  7  1  0  0  0  0\n  7  8  2  0  0  0  0\n  7  9  1  0  0  0  0\n  9 10  2  0  0  0  0\n 10 11  1  0  0  0  0\n 10 12  1  0  0  0  0\nM  END",
        "smiles": "C=C(C)CCOC(=O)C=C(C)C",
        "formula": "C10H16O2",
        "atropisomerism": "No",
        "charge": 0,
        "count": 1,
        "stereochemistry": "ACHIRAL",
        "defined_stereo": 0,
        "ez_centers": 0,
        "molecular_weight": "168.2332",
        "optical_activity": "NONE",
        "references": [
          "df043454-d36c-4755-b59e-4a017b904428"
        ],
        "stereo_centers": 0
      },
      "unii": "PUA7GWY6FV"
    }
  ]
}