{
  "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": "3e0fbe32-b1a8-442a-be17-731330cdc4e9",
          "code": "16215-21-7",
          "type": "PRIMARY",
          "url": "https://commonchemistry.cas.org/detail?cas_rn=16215-21-7",
          "code_system": "CAS",
          "references": [
            "dfd3ee47-8f8f-4701-9dfa-9092b7c24f90",
            "d48a306d-3485-4ebc-9ce9-41dc0071105c"
          ]
        },
        {
          "uuid": "0cdededc-f0a4-4e92-bdb0-3cfa03fdb774",
          "code": "240-343-5",
          "type": "PRIMARY",
          "url": "https://echa.europa.eu/substance-information/-/substanceinfo/100.036.660",
          "code_system": "ECHA (EC/EINECS)",
          "references": [
            "dfd3ee47-8f8f-4701-9dfa-9092b7c24f90"
          ]
        },
        {
          "uuid": "557d3bbc-5fb6-450a-9011-dc031938876f",
          "code": "85335",
          "type": "PRIMARY",
          "url": "https://pubchem.ncbi.nlm.nih.gov/compound/85335",
          "code_system": "PUBCHEM",
          "references": [
            "dfd3ee47-8f8f-4701-9dfa-9092b7c24f90"
          ]
        },
        {
          "uuid": "07ef8c09-41f3-e9f7-7dc3-bbb12d6298aa",
          "code": "DTXSID7044845",
          "type": "PRIMARY",
          "url": "https://comptox.epa.gov/dashboard/chemical/details/DTXSID7044845",
          "code_system": "EPA CompTox",
          "references": [
            "09940d99-0a73-ee28-a714-d6c254154ce1"
          ]
        },
        {
          "uuid": "de9d462f-bb92-48a0-8ea2-22f1b7d71de1",
          "code": "XC2PI7HKOE",
          "type": "PRIMARY",
          "code_system": "FDA UNII"
        },
        {
          "uuid": "21bba019-d439-6058-2338-d16a45121ab3",
          "code": "54830",
          "type": "PRIMARY",
          "url": "https://dtp.cancer.gov/dtpstandard/servlet/dwindex?searchtype=NSC&outputformat=html&searchlist=54830",
          "code_system": "NSC",
          "references": [
            "51ef199c-2007-71f4-0361-1cb670f3b2c8"
          ]
        }
      ],
      "substance_class": "chemical",
      "names": [
        {
          "uuid": "0370b4ac-e4d5-4005-9380-f1c7ed2aa422",
          "name": "BUTYL 3-MERCAPTOPROPANOATE",
          "stdName": "BUTYL 3-MERCAPTOPROPANOATE",
          "type": "sys",
          "languages": [
            "en"
          ],
          "preferred": false,
          "references": [
            "f258cb81-51be-4b96-ae3a-daaf89b62977",
            "d2997f2f-d89d-4bcd-ba66-dc66d70d2e1e"
          ],
          "display_name": false
        },
        {
          "uuid": "d858859b-3c03-4c02-a445-37bf791c3388",
          "name": "BUTYL 3-MERCAPTOPROPIONATE",
          "stdName": "BUTYL 3-MERCAPTOPROPIONATE",
          "type": "sys",
          "languages": [
            "en"
          ],
          "preferred": false,
          "references": [
            "f258cb81-51be-4b96-ae3a-daaf89b62977",
            "d2997f2f-d89d-4bcd-ba66-dc66d70d2e1e"
          ],
          "display_name": true
        },
        {
          "uuid": "f3fed83e-5781-4142-be2e-60c0496c29d5",
          "name": "NSC-54830",
          "stdName": "NSC-54830",
          "type": "cd",
          "languages": [
            "en"
          ],
          "preferred": false,
          "references": [
            "d2997f2f-d89d-4bcd-ba66-dc66d70d2e1e",
            "d2e1416f-361e-4b33-8b73-77761e368a29"
          ],
          "display_name": false
        },
        {
          "uuid": "60b1d302-c07f-4816-9806-55a005d9a97e",
          "name": "PROPANOIC ACID, 3-MERCAPTO-, BUTYL ESTER",
          "stdName": "PROPANOIC ACID, 3-MERCAPTO-, BUTYL ESTER",
          "type": "cn",
          "languages": [
            "en"
          ],
          "preferred": false,
          "references": [
            "d2997f2f-d89d-4bcd-ba66-dc66d70d2e1e",
            "d2e1416f-361e-4b33-8b73-77761e368a29"
          ],
          "display_name": false
        },
        {
          "uuid": "28b11cdb-9905-4af4-8311-dbb70c7cc468",
          "name": "PROPIONIC ACID, 3-MERCAPTO-, BUTYL ESTER",
          "stdName": "PROPIONIC ACID, 3-MERCAPTO-, BUTYL ESTER",
          "type": "sys",
          "languages": [
            "en"
          ],
          "preferred": false,
          "references": [
            "f258cb81-51be-4b96-ae3a-daaf89b62977",
            "d2997f2f-d89d-4bcd-ba66-dc66d70d2e1e"
          ],
          "display_name": false
        }
      ],
      "references": [
        {
          "uuid": "d2e1416f-361e-4b33-8b73-77761e368a29",
          "citation": "CHEMID",
          "doc_type": "SRS",
          "public_domain": true,
          "tags": [
            "NOMEN",
            "PUBLIC_DOMAIN_RELEASE",
            "AUTO_SELECTED"
          ]
        },
        {
          "uuid": "d2997f2f-d89d-4bcd-ba66-dc66d70d2e1e",
          "citation": "CHEMID",
          "doc_type": "CHEMID",
          "public_domain": true,
          "tags": [
            "NOMEN"
          ]
        },
        {
          "uuid": "f258cb81-51be-4b96-ae3a-daaf89b62977",
          "citation": "STN",
          "doc_type": "SRS",
          "public_domain": true,
          "tags": [
            "NOMEN"
          ]
        },
        {
          "uuid": "dfd3ee47-8f8f-4701-9dfa-9092b7c24f90",
          "citation": "SRS CODE IMPORT",
          "doc_type": "SRS",
          "public_domain": true,
          "document_date": 1493391640000,
          "tags": [
            "NOMEN"
          ]
        },
        {
          "uuid": "89eaf543-a95d-4007-94d3-49a27dd15aee",
          "citation": "SRS import [XC2PI7HKOE]",
          "url": "http://fdasis.nlm.nih.gov/srs/srsdirect.jsp?regno=XC2PI7HKOE",
          "doc_type": "SRS",
          "public_domain": true,
          "document_date": 1493391640000,
          "tags": [
            "NOMEN"
          ]
        },
        {
          "uuid": "cbd332b6-d9c4-4883-a948-60b6596ccda3",
          "citation": "CHEMID RECORD 16215-21-7",
          "doc_type": "SRS",
          "public_domain": true,
          "tags": [
            "NOMEN"
          ]
        },
        {
          "uuid": "09940d99-0a73-ee28-a714-d6c254154ce1",
          "citation": "WEBSITE",
          "url": "https://comptox.epa.gov/dashboard/dsstoxdb/results?utf8=%E2%9C%93&search=16215-21-7",
          "doc_type": "WEBSITE",
          "public_domain": true,
          "tags": [
            "NOMEN",
            "PUBLIC_DOMAIN_RELEASE"
          ]
        },
        {
          "uuid": "d48a306d-3485-4ebc-9ce9-41dc0071105c",
          "citation": "STN",
          "doc_type": "STN (SCIFINDER)",
          "public_domain": true
        },
        {
          "uuid": "51ef199c-2007-71f4-0361-1cb670f3b2c8",
          "citation": "NCI",
          "doc_type": "NCI DRUG DICTIONARY",
          "public_domain": true
        }
      ],
      "definition_type": "PRIMARY",
      "moieties": [
        {
          "uuid": "a5c77750-fac1-4af9-a53e-707201d3f732",
          "id": "a5c77750-fac1-4af9-a53e-707201d3f732",
          "molfile": "\n  Marvin  01132108372D          \n\n 10  9  0  0  0  0            999 V2000\n    0.0000   -0.6167    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0\n    0.7154   -0.2055    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0\n    1.4225   -0.6167    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0\n    2.1378   -0.2055    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0\n    2.8449   -0.6167    0.0000 O   0  0  0  0  0  0  0  0  0  0  0  0\n    3.5603   -0.2055    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0\n    3.5603    0.6167    0.0000 O   0  0  0  0  0  0  0  0  0  0  0  0\n    4.2755   -0.6167    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0\n    4.9827   -0.2055    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0\n    5.6981   -0.6167    0.0000 S   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  4  3  1  0  0  0  0\n  5  4  1  0  0  0  0\n  6  5  1  0  0  0  0\n  7  6  2  0  0  0  0\n  6  8  1  0  0  0  0\n  8  9  1  0  0  0  0\n  9 10  1  0  0  0  0\nM  END",
          "smiles": "CCCCOC(=O)CCS",
          "formula": "C7H14O2S",
          "atropisomerism": "No",
          "charge": 0,
          "count": 1,
          "stereochemistry": "ACHIRAL",
          "count_amount": {
            "type": "MOL RATIO",
            "average": 1,
            "units": "MOL RATIO",
            "uuid": "b712655e-b19b-4de7-887f-b975d91c7e7c"
          },
          "defined_stereo": 0,
          "ez_centers": 0,
          "molecular_weight": "162.2512",
          "optical_activity": "NONE",
          "stereo_centers": 0
        }
      ],
      "definition_level": "COMPLETE",
      "uuid": "164a4ff7-9364-4353-878f-15e5b2a884b9",
      "version": "4",
      "structure": {
        "id": "40af3f1f-e7f7-4cb2-b0d6-dd943d2c873c",
        "molfile": "\n  Marvin  01132103252D          \n\n 10  9  0  0  0  0            999 V2000\n    3.5603    0.6167    0.0000 O   0  0  0  0  0  0  0  0  0  0  0  0\n    3.5603   -0.2055    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0\n    2.8449   -0.6167    0.0000 O   0  0  0  0  0  0  0  0  0  0  0  0\n    2.1378   -0.2055    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0\n    1.4225   -0.6167    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0\n    0.7154   -0.2055    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0\n    0.0000   -0.6167    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0\n    4.2755   -0.6167    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0\n    4.9827   -0.2055    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0\n    5.6981   -0.6167    0.0000 S   0  0  0  0  0  0  0  0  0  0  0  0\n  1  2  2  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  2  8  1  0  0  0  0\n  8  9  1  0  0  0  0\n  9 10  1  0  0  0  0\nM  END",
        "smiles": "CCCCOC(=O)CCS",
        "formula": "C7H14O2S",
        "atropisomerism": "No",
        "charge": 0,
        "count": 1,
        "stereochemistry": "ACHIRAL",
        "defined_stereo": 0,
        "ez_centers": 0,
        "molecular_weight": "162.2512",
        "optical_activity": "NONE",
        "references": [
          "cbd332b6-d9c4-4883-a948-60b6596ccda3",
          "89eaf543-a95d-4007-94d3-49a27dd15aee"
        ],
        "stereo_centers": 0
      },
      "unii": "XC2PI7HKOE"
    }
  ]
}