{
  "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": "bed01772-8010-4c6a-9e46-6c1eb038a815",
          "code": "2-METHYLTETRAHYDROFURAN-3-ONE",
          "comments": "JECFA|FUNCTIONAL CLASSIFICATION|Flavouring Agent",
          "type": "PRIMARY",
          "url": "http://apps.who.int/food-additives-contaminants-jecfa-database/chemical.aspx?chemID=3830",
          "code_system": "JECFA EVALUATION",
          "references": [
            "ea734f1b-329d-4509-9b26-353608015eeb"
          ]
        },
        {
          "uuid": "4938832f-58bd-44f6-b5a5-fddb32a91c81",
          "code": "3188-00-9",
          "type": "PRIMARY",
          "url": "https://commonchemistry.cas.org/detail?cas_rn=3188-00-9",
          "code_system": "CAS",
          "references": [
            "ea734f1b-329d-4509-9b26-353608015eeb",
            "bd67a960-0d61-44df-94ec-c5e59853643e"
          ]
        },
        {
          "uuid": "98156ffc-9f83-46e3-be33-13af476c3dd8",
          "code": "COFFEE FURANONE",
          "type": "PRIMARY",
          "url": "https://en.wikipedia.org/wiki/Coffee_furanone",
          "code_system": "WIKIPEDIA",
          "references": [
            "ea734f1b-329d-4509-9b26-353608015eeb"
          ]
        },
        {
          "uuid": "84cc0a8f-6396-4f5c-9ea9-77e1d27db189",
          "code": "221-685-4",
          "type": "PRIMARY",
          "url": "https://echa.europa.eu/substance-information/-/substanceinfo/100.019.715",
          "code_system": "ECHA (EC/EINECS)",
          "references": [
            "ea734f1b-329d-4509-9b26-353608015eeb"
          ]
        },
        {
          "uuid": "d17c8586-7fa3-4af6-a244-37a667e9ba85",
          "code": "18522",
          "type": "PRIMARY",
          "url": "https://pubchem.ncbi.nlm.nih.gov/compound/18522",
          "code_system": "PUBCHEM",
          "references": [
            "ea734f1b-329d-4509-9b26-353608015eeb"
          ]
        },
        {
          "uuid": "10be8ed7-8ff6-cc80-05d8-21ba76dbf607",
          "code": "DTXSID9047677",
          "type": "PRIMARY",
          "url": "https://comptox.epa.gov/dashboard/chemical/details/DTXSID9047677",
          "code_system": "EPA CompTox",
          "references": [
            "6870e967-863a-1cdd-4c4a-6a83464381a0"
          ]
        },
        {
          "uuid": "c39ff8c4-6260-40f7-8fc3-f40f000fa00b",
          "code": "I3703CL967",
          "type": "PRIMARY",
          "code_system": "FDA UNII"
        },
        {
          "uuid": "d7de7e4d-98c0-462a-fd42-b76d185583fb",
          "code": "1436",
          "type": "PRIMARY",
          "url": "https://www.fao.org/food/food-safety-quality/scientific-advice/jecfa/jecfa-flav/details/en/c/1436/",
          "code_system": "JECFA MONOGRAPH",
          "references": [
            "faaa5ef6-70a7-38e8-c64c-391e293bd0e3"
          ]
        }
      ],
      "substance_class": "chemical",
      "names": [
        {
          "uuid": "0a516969-cf10-44c5-aa7c-6578683c5fcd",
          "name": "(±)-2-METHYLTETRAHYDROFURAN-3-ONE",
          "stdName": "(+/-)-2-METHYLTETRAHYDROFURAN-3-ONE",
          "type": "sys",
          "languages": [
            "en"
          ],
          "preferred": false,
          "references": [
            "3db1fa90-9035-4936-82c0-4e24aa14d946",
            "d24f7cfa-d362-4a92-8d21-b968a1d70804"
          ],
          "display_name": false
        },
        {
          "uuid": "da82d26d-0d3a-4963-87bb-508568d5c3ee",
          "name": "2-METHYL-3-OXOTETRAHYDROFURAN",
          "stdName": "2-METHYL-3-OXOTETRAHYDROFURAN",
          "type": "sys",
          "languages": [
            "en"
          ],
          "preferred": false,
          "references": [
            "3db1fa90-9035-4936-82c0-4e24aa14d946",
            "55f77b26-f584-4b35-8445-36cbc01d4eba"
          ],
          "display_name": false
        },
        {
          "uuid": "ffd39572-503e-46ec-8c86-05f50ff06b81",
          "name": "2-METHYLDIHYDROFURAN-3(2H)-ONE",
          "stdName": "2-METHYLDIHYDROFURAN-3(2H)-ONE",
          "type": "sys",
          "languages": [
            "en"
          ],
          "preferred": false,
          "references": [
            "3db1fa90-9035-4936-82c0-4e24aa14d946",
            "ff0a64a9-92dd-4a70-b648-5b6bf07f69b2"
          ],
          "display_name": false
        },
        {
          "uuid": "dee6e100-fa30-43eb-be7c-250b021bce95",
          "name": "2-METHYLTETRAHYDROFURAN-3-ONE",
          "stdName": "2-METHYLTETRAHYDROFURAN-3-ONE",
          "type": "sys",
          "languages": [
            "en"
          ],
          "preferred": false,
          "references": [
            "3db1fa90-9035-4936-82c0-4e24aa14d946",
            "b0bb1991-5df5-4bcd-88a8-bbf74d709f3a",
            "55f74aa6-ebd7-40c3-a413-85bff78ad793",
            "2dd47b34-ed73-4c6f-91b0-5d5bc35baae6"
          ],
          "display_name": true
        },
        {
          "uuid": "8d07d0d2-8f78-4a3f-ac3e-0a77ecb37926",
          "name": "2-METHYLTETRAHYDROFURAN-3-ONE [FHFI]",
          "stdName": "2-METHYLTETRAHYDROFURAN-3-ONE [FHFI]",
          "type": "cn",
          "languages": [
            "en"
          ],
          "preferred": false,
          "references": [
            "3db1fa90-9035-4936-82c0-4e24aa14d946",
            "2dd47b34-ed73-4c6f-91b0-5d5bc35baae6"
          ],
          "display_name": false
        },
        {
          "uuid": "b4919898-486a-4089-9da1-ad52d44bb85f",
          "name": "2-METHYLTETRAHYDROFURAN-3-ONE, (±)-",
          "stdName": "2-METHYLTETRAHYDROFURAN-3-ONE, (+/-)-",
          "type": "sys",
          "languages": [
            "en"
          ],
          "preferred": false,
          "references": [
            "3db1fa90-9035-4936-82c0-4e24aa14d946",
            "d24f7cfa-d362-4a92-8d21-b968a1d70804"
          ],
          "display_name": false
        },
        {
          "uuid": "198e7feb-cec6-4a86-9d1c-680149a759d4",
          "name": "3(2H)-FURANONE, DIHYDRO-2-METHYL-",
          "stdName": "3(2H)-FURANONE, DIHYDRO-2-METHYL-",
          "type": "sys",
          "languages": [
            "en"
          ],
          "preferred": false,
          "references": [
            "3db1fa90-9035-4936-82c0-4e24aa14d946",
            "b0bb1991-5df5-4bcd-88a8-bbf74d709f3a"
          ],
          "display_name": false
        },
        {
          "uuid": "75253bd0-eacc-4b80-a673-367286d65105",
          "name": "4,5-DIHYDRO-2-METHYLFURAN-3(2H)-ONE",
          "stdName": "4,5-DIHYDRO-2-METHYLFURAN-3(2H)-ONE",
          "type": "sys",
          "languages": [
            "en"
          ],
          "preferred": false,
          "references": [
            "3db1fa90-9035-4936-82c0-4e24aa14d946",
            "55f77b26-f584-4b35-8445-36cbc01d4eba"
          ],
          "display_name": false
        },
        {
          "uuid": "21046ebb-fc74-4c07-a56c-74c607b890d8",
          "name": "COFFEE FURANONE",
          "stdName": "COFFEE FURANONE",
          "type": "cn",
          "languages": [
            "en"
          ],
          "preferred": false,
          "references": [
            "3db1fa90-9035-4936-82c0-4e24aa14d946",
            "ce88f18b-ecfa-4af2-a8d4-ba8e0ab192f9"
          ],
          "display_name": false
        },
        {
          "uuid": "7c579719-4c94-421d-83ce-ada02fb2dd72",
          "name": "DIHYDRO-2-METHYL-3-FURANONE",
          "stdName": "DIHYDRO-2-METHYL-3-FURANONE",
          "type": "sys",
          "languages": [
            "en"
          ],
          "preferred": false,
          "references": [
            "3db1fa90-9035-4936-82c0-4e24aa14d946",
            "2608c537-422a-488e-b6d5-ea83d526313b"
          ],
          "display_name": false
        },
        {
          "uuid": "665c917b-9367-473f-b51e-2cf04e0c827d",
          "name": "FEMA NO. 3373",
          "stdName": "FEMA NO. 3373",
          "type": "cd",
          "languages": [
            "en"
          ],
          "preferred": false,
          "references": [
            "3db1fa90-9035-4936-82c0-4e24aa14d946",
            "55f77b26-f584-4b35-8445-36cbc01d4eba"
          ],
          "display_name": false
        }
      ],
      "references": [
        {
          "uuid": "55f77b26-f584-4b35-8445-36cbc01d4eba",
          "citation": "JECFA",
          "doc_type": "SRS",
          "public_domain": true,
          "tags": [
            "NOMEN",
            "PUBLIC_DOMAIN_RELEASE",
            "AUTO_SELECTED"
          ]
        },
        {
          "uuid": "3db1fa90-9035-4936-82c0-4e24aa14d946",
          "citation": "JECFA: JOINT FAO/WHO COMMITTEE FOOD ADD",
          "doc_type": "JECFA: JOINT FAO/WHO COMMITTEE FOOD ADD",
          "public_domain": true,
          "tags": [
            "NOMEN"
          ]
        },
        {
          "uuid": "b0bb1991-5df5-4bcd-88a8-bbf74d709f3a",
          "citation": "CHEMID",
          "doc_type": "SRS",
          "public_domain": true,
          "tags": [
            "NOMEN"
          ]
        },
        {
          "uuid": "2dd47b34-ed73-4c6f-91b0-5d5bc35baae6",
          "citation": "FHFI",
          "doc_type": "SRS",
          "public_domain": true,
          "tags": [
            "NOMEN"
          ]
        },
        {
          "uuid": "2608c537-422a-488e-b6d5-ea83d526313b",
          "citation": "STN",
          "doc_type": "SRS",
          "public_domain": true,
          "tags": [
            "NOMEN"
          ]
        },
        {
          "uuid": "ce88f18b-ecfa-4af2-a8d4-ba8e0ab192f9",
          "citation": "http://www.thegoodscentscompany.com/data/rw1036001.html",
          "url": "http://www.thegoodscentscompany.com/data/rw1036001.html",
          "doc_type": "SRS",
          "public_domain": true,
          "tags": [
            "NOMEN"
          ]
        },
        {
          "uuid": "d24f7cfa-d362-4a92-8d21-b968a1d70804",
          "citation": "FDA_SRS",
          "doc_type": "SRS",
          "public_domain": true,
          "tags": [
            "NOMEN"
          ]
        },
        {
          "uuid": "ff0a64a9-92dd-4a70-b648-5b6bf07f69b2",
          "citation": "TOX 21",
          "doc_type": "SRS",
          "public_domain": true,
          "tags": [
            "NOMEN"
          ]
        },
        {
          "uuid": "ea734f1b-329d-4509-9b26-353608015eeb",
          "citation": "SRS CODE IMPORT",
          "doc_type": "SRS",
          "public_domain": true,
          "document_date": 1493390862000,
          "tags": [
            "NOMEN"
          ]
        },
        {
          "uuid": "5ee48564-70ef-416c-9a55-4a3438f8e2af",
          "citation": "AN OVERVIEW OF THE EFFECTS OF TOBACCO INGREDIENTS ON SMOKE CHEMISTRY AND TOXICITY; FOOD AND CHEMICAL TOXICOLOGY; BAKER, RR; 42(SUPPL):53-83, 2004",
          "url": "http://www.sciencedirect.com/science/article/pii/S0278691504000043",
          "doc_type": "JOURNAL ARTICLE",
          "public_domain": true,
          "tags": [
            "NOMEN"
          ]
        },
        {
          "uuid": "5396c833-9e88-42de-afa5-04aea9a5749e",
          "citation": "SRS import [I3703CL967]",
          "url": "http://fdasis.nlm.nih.gov/srs/srsdirect.jsp?regno=I3703CL967",
          "doc_type": "SRS",
          "public_domain": true,
          "document_date": 1493390862000,
          "tags": [
            "NOMEN"
          ]
        },
        {
          "uuid": "55f74aa6-ebd7-40c3-a413-85bff78ad793",
          "citation": "2-METHYLTETRAHYDROFURAN-3-ONE [FHFI]",
          "doc_type": "SRS_LOCATOR",
          "public_domain": true
        },
        {
          "uuid": "6870e967-863a-1cdd-4c4a-6a83464381a0",
          "citation": "WEBSITE",
          "url": "https://comptox.epa.gov/dashboard/dsstoxdb/results?utf8=%E2%9C%93&search=3188-00-9",
          "doc_type": "WEBSITE",
          "public_domain": true,
          "tags": [
            "NOMEN",
            "PUBLIC_DOMAIN_RELEASE"
          ]
        },
        {
          "uuid": "bd67a960-0d61-44df-94ec-c5e59853643e",
          "citation": "STN",
          "doc_type": "STN (SCIFINDER)",
          "public_domain": true
        },
        {
          "uuid": "faaa5ef6-70a7-38e8-c64c-391e293bd0e3",
          "citation": "JECFA",
          "doc_type": "JECFA",
          "public_domain": true
        }
      ],
      "definition_type": "PRIMARY",
      "moieties": [
        {
          "uuid": "8d072fcd-3884-472d-9e90-7e31a13ee419",
          "id": "8d072fcd-3884-472d-9e90-7e31a13ee419",
          "molfile": "\n  Marvin  01132107192D          \n\n  7  7  0  0  0  0            999 V2000\n    2.9555   -0.2207    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0\n    2.2942   -0.4628    0.0000 C   0  0  0  0  0  0  0  0  0  3  0  0\n    1.6275    0.0052    0.0000 O   0  0  0  0  0  0  0  0  0  0  0  0\n    0.9607   -0.4628    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0\n    1.2164   -1.2608    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0\n    2.0414   -1.2608    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0\n    2.5203   -1.7480    0.0000 O   0  0  0  0  0  0  0  0  0  0  0  0\n  2  1  1  0  0  0  0\n  2  3  1  0  0  0  0\n  6  2  1  0  0  0  0\n  3  4  1  0  0  0  0\n  5  4  1  0  0  0  0\n  6  5  1  0  0  0  0\n  6  7  2  0  0  0  0\nM  END",
          "smiles": "CC1C(=O)CCO1",
          "formula": "C5H8O2",
          "atropisomerism": "No",
          "charge": 0,
          "count": 1,
          "stereochemistry": "RACEMIC",
          "count_amount": {
            "type": "MOL RATIO",
            "average": 1,
            "units": "MOL RATIO",
            "uuid": "3d9d8656-c0d4-4cc7-a04b-c226b4051edb"
          },
          "defined_stereo": 0,
          "ez_centers": 0,
          "molecular_weight": "100.116",
          "optical_activity": "( + / - )",
          "stereo_centers": 1
        }
      ],
      "definition_level": "COMPLETE",
      "uuid": "cfddc72c-2c82-4769-8f04-6434c32d7013",
      "version": "5",
      "structure": {
        "id": "bb086081-ac11-4c35-bcc1-6e0c588c7eb8",
        "molfile": "\n  Marvin  01132109402D          \n\n  7  7  0  0  0  0            999 V2000\n    2.0414   -1.2608    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0\n    2.2942   -0.4628    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0\n    1.2164   -1.2608    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0\n    2.5203   -1.7480    0.0000 O   0  0  0  0  0  0  0  0  0  0  0  0\n    1.6275    0.0052    0.0000 O   0  0  0  0  0  0  0  0  0  0  0  0\n    2.9555   -0.2207    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0\n    0.9607   -0.4628    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0\n  1  2  1  0  0  0  0\n  1  3  1  0  0  0  0\n  1  4  2  0  0  0  0\n  2  5  1  0  0  0  0\n  2  6  1  0  0  0  0\n  3  7  1  0  0  0  0\n  5  7  1  0  0  0  0\nM  END",
        "smiles": "CC1C(=O)CCO1",
        "formula": "C5H8O2",
        "atropisomerism": "No",
        "charge": 0,
        "count": 1,
        "stereochemistry": "RACEMIC",
        "defined_stereo": 0,
        "ez_centers": 0,
        "molecular_weight": "100.116",
        "optical_activity": "( + / - )",
        "references": [
          "b0bb1991-5df5-4bcd-88a8-bbf74d709f3a",
          "5396c833-9e88-42de-afa5-04aea9a5749e"
        ],
        "stereo_centers": 1
      },
      "unii": "I3703CL967"
    }
  ]
}