{
  "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": "1b60d0a6-ba80-474c-8f25-a38a0f47edab",
          "code": "3682-42-6",
          "type": "PRIMARY",
          "url": "https://commonchemistry.cas.org/detail?cas_rn=3682-42-6",
          "code_system": "CAS",
          "references": [
            "3ba4d452-1e9f-4122-995d-a3d22a9a769c",
            "3f39badb-d2f0-44d3-8123-438f620a1db9"
          ]
        },
        {
          "uuid": "30d641e1-9eff-433e-919e-da2a1b4e55cd",
          "code": "545106",
          "type": "PRIMARY",
          "url": "https://pubchem.ncbi.nlm.nih.gov/compound/545106",
          "code_system": "PUBCHEM",
          "references": [
            "3ba4d452-1e9f-4122-995d-a3d22a9a769c"
          ]
        },
        {
          "uuid": "55bb5ffb-5d7e-ecf4-3281-b3933d7c02a3",
          "code": "DTXSID10863244",
          "type": "PRIMARY",
          "url": "https://comptox.epa.gov/dashboard/chemical/details/DTXSID10863244",
          "code_system": "EPA CompTox",
          "references": [
            "f123c797-3587-7df5-a6c6-72646c155d8c"
          ]
        },
        {
          "uuid": "f68a6fb6-9510-4a30-b483-f04c9fbc20ff",
          "code": "9909D8DVH1",
          "type": "PRIMARY",
          "code_system": "FDA UNII"
        },
        {
          "uuid": "b5cb9881-57e9-9825-85b8-4e20fc2350ec",
          "code": "686",
          "type": "PRIMARY",
          "url": "https://www.fao.org/food/food-safety-quality/scientific-advice/jecfa/jecfa-flav/details/en/c/686/",
          "code_system": "JECFA MONOGRAPH",
          "references": [
            "153f02ea-1bf4-94ef-5b6c-1923ca5b9698"
          ]
        }
      ],
      "substance_class": "chemical",
      "names": [
        {
          "uuid": "5366b1f9-46b6-4f81-9715-d025073ce08a",
          "name": "(±)-METHYL 2-OXO-3-METHYLPENTANOATE",
          "stdName": "(+/-)-METHYL 2-OXO-3-METHYLPENTANOATE",
          "type": "sys",
          "languages": [
            "en"
          ],
          "preferred": false,
          "references": [
            "f1321e1d-74bd-4012-9336-39e5c6b2f68d",
            "37dea907-296d-4165-876c-a4015e912456"
          ],
          "display_name": false
        },
        {
          "uuid": "cd13c54e-37c2-4ee4-8e55-0c4cb492b713",
          "name": "FEMA NO. 3713",
          "stdName": "FEMA NO. 3713",
          "type": "cd",
          "languages": [
            "en"
          ],
          "preferred": false,
          "references": [
            "f1321e1d-74bd-4012-9336-39e5c6b2f68d",
            "51a52db7-1ecd-44c5-b68b-e50f48e80033"
          ],
          "display_name": false
        },
        {
          "uuid": "fb66af70-d935-42fe-82b9-2cd2a5866ad7",
          "name": "METHYL 2-KETO-3-METHYLVALERATE",
          "stdName": "METHYL 2-KETO-3-METHYLVALERATE",
          "type": "sys",
          "languages": [
            "en"
          ],
          "preferred": false,
          "references": [
            "f1321e1d-74bd-4012-9336-39e5c6b2f68d",
            "51a52db7-1ecd-44c5-b68b-e50f48e80033"
          ],
          "display_name": false
        },
        {
          "uuid": "9abfd4d2-3656-4aaf-8c20-2080e987d7cb",
          "name": "METHYL 2-OXO-3-METHYLPENTANOATE",
          "stdName": "METHYL 2-OXO-3-METHYLPENTANOATE",
          "type": "sys",
          "languages": [
            "en"
          ],
          "preferred": false,
          "references": [
            "f536247d-d1ce-4c63-883b-889f8ea79423",
            "f1321e1d-74bd-4012-9336-39e5c6b2f68d",
            "51a52db7-1ecd-44c5-b68b-e50f48e80033",
            "304bb4ab-e417-45c5-ac6f-2d8f41d68eb0"
          ],
          "display_name": true
        },
        {
          "uuid": "42343921-587e-4d0b-8c68-2768d9d1d0e0",
          "name": "METHYL 2-OXO-3-METHYLPENTANOATE [FHFI]",
          "stdName": "METHYL 2-OXO-3-METHYLPENTANOATE [FHFI]",
          "type": "cn",
          "languages": [
            "en"
          ],
          "preferred": false,
          "references": [
            "f1321e1d-74bd-4012-9336-39e5c6b2f68d",
            "304bb4ab-e417-45c5-ac6f-2d8f41d68eb0"
          ],
          "display_name": false
        },
        {
          "uuid": "cc010c04-c2d0-422e-a6b6-aa135f10953a",
          "name": "METHYL 2-OXO-3-METHYLPENTANOATE, (±)-",
          "stdName": "METHYL 2-OXO-3-METHYLPENTANOATE, (+/-)-",
          "type": "sys",
          "languages": [
            "en"
          ],
          "preferred": false,
          "references": [
            "f1321e1d-74bd-4012-9336-39e5c6b2f68d",
            "37dea907-296d-4165-876c-a4015e912456"
          ],
          "display_name": false
        },
        {
          "uuid": "79f87132-4332-4099-8772-88199b89a6d8",
          "name": "METHYL 3-METHYL-2-OXOPENTANOATE",
          "stdName": "METHYL 3-METHYL-2-OXOPENTANOATE",
          "type": "sys",
          "languages": [
            "en"
          ],
          "preferred": false,
          "references": [
            "f1321e1d-74bd-4012-9336-39e5c6b2f68d",
            "51a52db7-1ecd-44c5-b68b-e50f48e80033"
          ],
          "display_name": false
        },
        {
          "uuid": "f97b0cf9-7155-4b7e-9347-81807b6df63b",
          "name": "METHYL 3-METHYL-2-OXOVALERATE",
          "stdName": "METHYL 3-METHYL-2-OXOVALERATE",
          "type": "sys",
          "languages": [
            "en"
          ],
          "preferred": false,
          "references": [
            "f1321e1d-74bd-4012-9336-39e5c6b2f68d",
            "c22c6795-fbc4-4234-8539-bd04015ea1ee"
          ],
          "display_name": false
        },
        {
          "uuid": "b542ba4c-98d7-4962-a42a-8b803a649b43",
          "name": "PENTANOIC ACID, 3-METHYL-2-OXO-, METHYL ESTER",
          "stdName": "PENTANOIC ACID, 3-METHYL-2-OXO-, METHYL ESTER",
          "type": "cn",
          "languages": [
            "en"
          ],
          "preferred": false,
          "references": [
            "f1321e1d-74bd-4012-9336-39e5c6b2f68d",
            "c22c6795-fbc4-4234-8539-bd04015ea1ee"
          ],
          "display_name": false
        },
        {
          "uuid": "a914e247-60f8-43ed-8cfd-96fe565dd311",
          "name": "VALERIC ACID, 3-METHYL-2-OXO-, METHYL ESTER",
          "stdName": "VALERIC ACID, 3-METHYL-2-OXO-, METHYL ESTER",
          "type": "cn",
          "languages": [
            "en"
          ],
          "preferred": false,
          "references": [
            "f1321e1d-74bd-4012-9336-39e5c6b2f68d",
            "c22c6795-fbc4-4234-8539-bd04015ea1ee"
          ],
          "display_name": false
        }
      ],
      "references": [
        {
          "uuid": "51a52db7-1ecd-44c5-b68b-e50f48e80033",
          "citation": "CHEMID",
          "doc_type": "SRS",
          "public_domain": true,
          "tags": [
            "NOMEN",
            "PUBLIC_DOMAIN_RELEASE",
            "AUTO_SELECTED"
          ]
        },
        {
          "uuid": "f1321e1d-74bd-4012-9336-39e5c6b2f68d",
          "citation": "CHEMID",
          "doc_type": "CHEMID",
          "public_domain": true,
          "tags": [
            "NOMEN"
          ]
        },
        {
          "uuid": "37dea907-296d-4165-876c-a4015e912456",
          "citation": "FDA_SRS",
          "doc_type": "SRS",
          "public_domain": true,
          "tags": [
            "NOMEN"
          ]
        },
        {
          "uuid": "c22c6795-fbc4-4234-8539-bd04015ea1ee",
          "citation": "STN",
          "doc_type": "SRS",
          "public_domain": true,
          "tags": [
            "NOMEN"
          ]
        },
        {
          "uuid": "304bb4ab-e417-45c5-ac6f-2d8f41d68eb0",
          "citation": "FHFI",
          "doc_type": "SRS",
          "public_domain": true,
          "tags": [
            "NOMEN"
          ]
        },
        {
          "uuid": "3ba4d452-1e9f-4122-995d-a3d22a9a769c",
          "citation": "SRS CODE IMPORT",
          "doc_type": "SRS",
          "public_domain": true,
          "document_date": 1493391075000,
          "tags": [
            "NOMEN"
          ]
        },
        {
          "uuid": "bfecb311-d922-473f-98b1-3285c6853c52",
          "citation": "SRS import [9909D8DVH1]",
          "url": "http://fdasis.nlm.nih.gov/srs/srsdirect.jsp?regno=9909D8DVH1",
          "doc_type": "SRS",
          "public_domain": true,
          "document_date": 1493391075000,
          "tags": [
            "NOMEN"
          ]
        },
        {
          "uuid": "f536247d-d1ce-4c63-883b-889f8ea79423",
          "citation": "METHYL 2-OXO-3-METHYLPENTANOATE [FHFI]",
          "doc_type": "SRS_LOCATOR",
          "public_domain": true
        },
        {
          "uuid": "3f39badb-d2f0-44d3-8123-438f620a1db9",
          "citation": "STN",
          "doc_type": "STN (SCIFINDER)",
          "public_domain": true
        },
        {
          "uuid": "f123c797-3587-7df5-a6c6-72646c155d8c",
          "citation": "EPA CompTox",
          "doc_type": "EPA",
          "public_domain": true
        },
        {
          "uuid": "153f02ea-1bf4-94ef-5b6c-1923ca5b9698",
          "citation": "JECFA",
          "doc_type": "JECFA",
          "public_domain": true
        }
      ],
      "definition_type": "PRIMARY",
      "moieties": [
        {
          "uuid": "a9a6eb74-daa2-4cd0-9ea6-7e7dd9ce1906",
          "id": "a9a6eb74-daa2-4cd0-9ea6-7e7dd9ce1906",
          "molfile": "\n  Marvin  01132108482D          \n\n 10  9  0  0  0  0            999 V2000\n    5.2254   -3.5143    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0\n    4.5110   -3.9268    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0\n    3.7965   -3.5143    0.0000 C   0  0  0  0  0  0  0  0  0  3  0  0\n    3.7965   -2.6893    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0\n    3.0820   -3.9268    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0\n    3.0820   -4.7518    0.0000 O   0  0  0  0  0  0  0  0  0  0  0  0\n    2.3676   -3.5144    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0\n    2.3676   -2.6893    0.0000 O   0  0  0  0  0  0  0  0  0  0  0  0\n    1.6531   -3.9268    0.0000 O   0  0  0  0  0  0  0  0  0  0  0  0\n    0.9386   -3.5144    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0\n  2  1  1  0  0  0  0\n  3  2  1  0  0  0  0\n  3  4  1  0  0  0  0\n  5  3  1  0  0  0  0\n  5  6  2  0  0  0  0\n  7  5  1  0  0  0  0\n  7  8  2  0  0  0  0\n  9  7  1  0  0  0  0\n 10  9  1  0  0  0  0\nM  END",
          "smiles": "CCC(C)C(=O)C(=O)OC",
          "formula": "C7H12O3",
          "atropisomerism": "No",
          "charge": 0,
          "count": 1,
          "stereochemistry": "RACEMIC",
          "count_amount": {
            "type": "MOL RATIO",
            "average": 1,
            "units": "MOL RATIO",
            "uuid": "e4e5a0ab-d682-4e1a-8295-6a95ea12a271"
          },
          "defined_stereo": 0,
          "ez_centers": 0,
          "molecular_weight": "144.1687",
          "optical_activity": "( + / - )",
          "stereo_centers": 1
        }
      ],
      "definition_level": "COMPLETE",
      "uuid": "4340e2ca-a377-46b5-a4dc-93974f000f08",
      "version": "6",
      "structure": {
        "id": "134dc625-224a-4a1b-9e63-068785e1f9ce",
        "molfile": "\n  Marvin  01132101132D          \n\n 10  9  0  0  0  0            999 V2000\n    0.9386   -3.5144    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0\n    1.6531   -3.9268    0.0000 O   0  0  0  0  0  0  0  0  0  0  0  0\n    2.3676   -3.5144    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0\n    3.0820   -3.9268    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0\n    3.7965   -3.5143    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0\n    4.5110   -3.9268    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0\n    5.2254   -3.5143    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0\n    2.3676   -2.6893    0.0000 O   0  0  0  0  0  0  0  0  0  0  0  0\n    3.0820   -4.7518    0.0000 O   0  0  0  0  0  0  0  0  0  0  0  0\n    3.7965   -2.6893    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  1  0  0  0  0\n  3  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  3  8  2  0  0  0  0\n  4  9  2  0  0  0  0\n  5 10  1  0  0  0  0\nM  END",
        "smiles": "CCC(C)C(=O)C(=O)OC",
        "formula": "C7H12O3",
        "atropisomerism": "No",
        "charge": 0,
        "count": 1,
        "stereochemistry": "RACEMIC",
        "defined_stereo": 0,
        "ez_centers": 0,
        "molecular_weight": "144.1687",
        "optical_activity": "( + / - )",
        "references": [
          "bfecb311-d922-473f-98b1-3285c6853c52",
          "51a52db7-1ecd-44c5-b68b-e50f48e80033"
        ],
        "stereo_centers": 1
      },
      "unii": "9909D8DVH1"
    }
  ]
}