{
  "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": "2026-09-09",
    "results": {
      "skip": 0,
      "limit": 1,
      "total": 1
    }
  },
  "results": [
    {
      "codes": [
        {
          "uuid": "b3c484ed-fc51-43a3-acf8-259158b7159f",
          "code": "39212-23-2",
          "type": "PRIMARY",
          "url": "https://commonchemistry.cas.org/detail?cas_rn=39212-23-2",
          "code_system": "CAS",
          "references": [
            "92500eb5-699e-4cd0-bf0c-a8aa33b66e81"
          ]
        },
        {
          "uuid": "acf61241-ba7b-46aa-b161-fad9abbc5637",
          "code": "254-357-4",
          "type": "PRIMARY",
          "url": "https://echa.europa.eu/substance-information/-/substanceinfo/100.049.398",
          "code_system": "ECHA (EC/EINECS)",
          "references": [
            "92500eb5-699e-4cd0-bf0c-a8aa33b66e81"
          ]
        },
        {
          "uuid": "2c215089-c2fd-febb-e559-16b4737c5565",
          "code": "DTXSID90865948",
          "type": "PRIMARY",
          "url": "https://comptox.epa.gov/dashboard/chemical/details/DTXSID90865948",
          "code_system": "EPA CompTox"
        },
        {
          "uuid": "e5a19971-1bbe-4e70-beed-e3ec42ccd8bc",
          "code": "HKX8Y5BUAO",
          "type": "PRIMARY",
          "code_system": "FDA UNII"
        },
        {
          "uuid": "31dcb672-3e67-8cd1-655c-778051d7a0a1",
          "code": "427",
          "type": "PRIMARY",
          "url": "https://www.fao.org/food/food-safety-quality/scientific-advice/jecfa/jecfa-flav/details/en/c/427/",
          "code_system": "JECFA MONOGRAPH",
          "references": [
            "33fdb842-8bf8-08ea-59c4-56b040c5ccd0"
          ]
        }
      ],
      "substance_class": "mixture",
      "names": [
        {
          "uuid": "7b2e1138-fc54-49a3-86a4-45dac68dc4e3",
          "name": "(±)-5-BUTYL-4-METHYLDIHYDRO-2(3H)-FURANONE",
          "stdName": "(+/-)-5-BUTYL-4-METHYLDIHYDRO-2(3H)-FURANONE",
          "type": "cn",
          "languages": [
            "en"
          ],
          "preferred": false,
          "references": [
            "d3ac6894-ba32-4042-b141-447e3e2e65c6",
            "b97ea2f2-178c-4efd-b92d-c4251a2f42da"
          ],
          "display_name": false
        },
        {
          "uuid": "49ad4f11-1a94-4bf9-991d-a603c9bf9725",
          "name": ".BETA.-METHYL-.GAMMA.-OCTALACTONE",
          "stdName": ".BETA.-METHYL-.GAMMA.-OCTALACTONE",
          "type": "cn",
          "languages": [
            "en"
          ],
          "preferred": false,
          "references": [
            "b97ea2f2-178c-4efd-b92d-c4251a2f42da",
            "14161a63-0160-4d43-b42f-9060ac8b044e"
          ],
          "display_name": false
        },
        {
          "uuid": "ee3022c9-d5e2-4152-93c9-1a291aac3159",
          "name": "2(3H)-FURANONE, 5-BUTYLDIHYDRO-4-METHYL-",
          "stdName": "2(3H)-FURANONE, 5-BUTYLDIHYDRO-4-METHYL-",
          "type": "cn",
          "languages": [
            "en"
          ],
          "preferred": false,
          "references": [
            "b97ea2f2-178c-4efd-b92d-c4251a2f42da",
            "c62867bd-703f-4266-a76e-bafbb65f4099"
          ],
          "display_name": false
        },
        {
          "uuid": "631585b4-9d78-4168-ac1d-b729401b4544",
          "name": "3-METHYL-4-OCTANOLIDE",
          "stdName": "3-METHYL-4-OCTANOLIDE",
          "type": "cn",
          "languages": [
            "en"
          ],
          "preferred": false,
          "references": [
            "b97ea2f2-178c-4efd-b92d-c4251a2f42da",
            "c62867bd-703f-4266-a76e-bafbb65f4099"
          ],
          "display_name": false
        },
        {
          "uuid": "820eefb0-1e88-46ce-83b0-b9ea094b34d2",
          "name": "3-METHYLOCTANO-4-LACTONE",
          "stdName": "3-METHYLOCTANO-4-LACTONE",
          "type": "cn",
          "languages": [
            "en"
          ],
          "preferred": false,
          "references": [
            "b97ea2f2-178c-4efd-b92d-c4251a2f42da",
            "c62867bd-703f-4266-a76e-bafbb65f4099"
          ],
          "display_name": false
        },
        {
          "uuid": "71dfd20e-0a43-4aa2-9b89-a8f26b2c4716",
          "name": "4-HYDROXY-3-METHYLOCTANOIC ACID LACTONE [FHFI]",
          "stdName": "4-HYDROXY-3-METHYLOCTANOIC ACID LACTONE [FHFI]",
          "type": "cn",
          "languages": [
            "en"
          ],
          "preferred": false,
          "references": [
            "b97ea2f2-178c-4efd-b92d-c4251a2f42da",
            "a51fcdd9-1a33-4197-80c3-bd9f6a79b7a1"
          ],
          "display_name": false
        },
        {
          "uuid": "32610992-0ca9-42d9-aa8b-ff25571621cf",
          "name": "5-BUTYL-4-METHYLDIHYDRO-2(3H)-FURANONE",
          "stdName": "5-BUTYL-4-METHYLDIHYDRO-2(3H)-FURANONE",
          "type": "cn",
          "languages": [
            "en"
          ],
          "preferred": false,
          "references": [
            "b97ea2f2-178c-4efd-b92d-c4251a2f42da",
            "9a8892d1-38e3-4176-b0fd-39706e8a54d0"
          ],
          "display_name": true
        },
        {
          "uuid": "1f512f89-8245-42bd-9840-d833449f2886",
          "name": "FEMA NO. 3803",
          "stdName": "FEMA NO. 3803",
          "type": "cd",
          "languages": [
            "en"
          ],
          "preferred": false,
          "references": [
            "b97ea2f2-178c-4efd-b92d-c4251a2f42da",
            "14161a63-0160-4d43-b42f-9060ac8b044e"
          ],
          "display_name": false
        },
        {
          "uuid": "e1f1940b-f3b2-43c8-9cf9-1fe481a1a630",
          "name": "OAKLACTONE",
          "stdName": "OAKLACTONE",
          "type": "cn",
          "languages": [
            "en"
          ],
          "preferred": false,
          "references": [
            "b97ea2f2-178c-4efd-b92d-c4251a2f42da",
            "c62867bd-703f-4266-a76e-bafbb65f4099"
          ],
          "display_name": false
        },
        {
          "uuid": "100eb45e-a916-4455-adc0-72ad20b21056",
          "name": "WHISKEY LACTONE",
          "stdName": "WHISKEY LACTONE",
          "type": "cn",
          "languages": [
            "en"
          ],
          "preferred": false,
          "references": [
            "b97ea2f2-178c-4efd-b92d-c4251a2f42da",
            "c62867bd-703f-4266-a76e-bafbb65f4099"
          ],
          "display_name": false
        }
      ],
      "references": [
        {
          "uuid": "c62867bd-703f-4266-a76e-bafbb65f4099",
          "citation": "STN",
          "doc_type": "SRS",
          "public_domain": true,
          "tags": [
            "NOMEN",
            "PUBLIC_DOMAIN_RELEASE",
            "AUTO_SELECTED"
          ]
        },
        {
          "uuid": "b97ea2f2-178c-4efd-b92d-c4251a2f42da",
          "citation": "STN (SCIFINDER)",
          "doc_type": "STN (SCIFINDER)",
          "public_domain": true,
          "tags": [
            "NOMEN"
          ]
        },
        {
          "uuid": "14161a63-0160-4d43-b42f-9060ac8b044e",
          "citation": "CHEMID",
          "doc_type": "SRS",
          "public_domain": true,
          "tags": [
            "NOMEN"
          ]
        },
        {
          "uuid": "a51fcdd9-1a33-4197-80c3-bd9f6a79b7a1",
          "citation": "FHFI",
          "doc_type": "SRS",
          "public_domain": true,
          "tags": [
            "NOMEN"
          ]
        },
        {
          "uuid": "d3ac6894-ba32-4042-b141-447e3e2e65c6",
          "citation": "SIGMA-ALDRICH",
          "doc_type": "SRS",
          "public_domain": true,
          "tags": [
            "NOMEN"
          ]
        },
        {
          "uuid": "9a8892d1-38e3-4176-b0fd-39706e8a54d0",
          "citation": "jecfa",
          "doc_type": "SRS",
          "public_domain": true,
          "tags": [
            "NOMEN"
          ]
        },
        {
          "uuid": "92500eb5-699e-4cd0-bf0c-a8aa33b66e81",
          "citation": "SRS CODE IMPORT",
          "doc_type": "SRS",
          "public_domain": true,
          "document_date": 1493391303000,
          "tags": [
            "NOMEN"
          ]
        },
        {
          "uuid": "f913319c-05f9-4ab5-9aa4-c564daa0b15c",
          "citation": "SRS import [HKX8Y5BUAO]",
          "url": "http://fdasis.nlm.nih.gov/srs/srsdirect.jsp?regno=HKX8Y5BUAO",
          "doc_type": "SRS",
          "public_domain": true,
          "document_date": 1493391303000,
          "tags": [
            "NOMEN"
          ]
        },
        {
          "uuid": "b9e40992-0053-409d-afcf-fa47a17e7320",
          "citation": "SIGMA",
          "doc_type": "SRS",
          "public_domain": true,
          "tags": [
            "NOMEN"
          ]
        },
        {
          "uuid": "33fdb842-8bf8-08ea-59c4-56b040c5ccd0",
          "citation": "JECFA",
          "doc_type": "JECFA",
          "public_domain": true
        }
      ],
      "mixture": {
        "uuid": "7ef72da8-ee1f-408c-8866-42a1e8c1cbab",
        "components": [
          {
            "uuid": "b8291717-a920-4f4f-9827-af5af2cba59d",
            "type": "MUST_BE_PRESENT",
            "substance": {
              "uuid": "24e0d5a1-6a48-42c5-a002-f4d771efb3ce",
              "refuuid": "37d4f88e-0821-438a-8efc-91a131154e2c",
              "name": "5-BUTYL-4-METHYLDIHYDRO-2(3H)-FURANONE, TRANS-",
              "unii": "29IPH2W8KP",
              "linking_id": "29IPH2W8KP",
              "ref_pname": "5-BUTYL-4-METHYLDIHYDRO-2(3H)-FURANONE, TRANS-",
              "substance_class": "reference"
            },
            "references": []
          },
          {
            "uuid": "f366ed2b-fa5f-43d6-8360-a5a5a409d232",
            "type": "MUST_BE_PRESENT",
            "substance": {
              "uuid": "071d0b67-1992-4f99-81b7-f876259380f7",
              "refuuid": "239e1da3-6869-4545-a1f0-6e7ffeae6369",
              "name": "5-BUTYL-4-METHYLDIHYDRO-2(3H)-FURANONE, (Z)-",
              "unii": "O93PZ85MTG",
              "linking_id": "O93PZ85MTG",
              "ref_pname": "5-BUTYL-4-METHYLDIHYDRO-2(3H)-FURANONE, (Z)-",
              "substance_class": "reference"
            },
            "references": []
          }
        ],
        "references": [
          "b9e40992-0053-409d-afcf-fa47a17e7320",
          "f913319c-05f9-4ab5-9aa4-c564daa0b15c"
        ]
      },
      "definition_type": "PRIMARY",
      "definition_level": "COMPLETE",
      "uuid": "0b915fa8-dcb0-4c08-a5f1-7c71a6e49920",
      "version": "3",
      "unii": "HKX8Y5BUAO"
    }
  ]
}