{
  "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": "28dc078b-37fc-4313-900f-50590e956337",
          "code": "2-PYRAZINYLETHANETHIOL",
          "comments": "JECFA|FUNCTIONAL CLASSIFICATION|Flavouring Agent",
          "type": "PRIMARY",
          "url": "http://apps.who.int/food-additives-contaminants-jecfa-database/chemical.aspx?chemID=4364",
          "code_system": "JECFA EVALUATION",
          "references": [
            "4da23bc8-8473-4ba4-a01e-74563614e3ea"
          ]
        },
        {
          "uuid": "d27e0f13-2c4b-4819-8426-f9800d60ef8a",
          "code": "35250-53-4",
          "type": "PRIMARY",
          "url": "https://commonchemistry.cas.org/detail?cas_rn=35250-53-4",
          "code_system": "CAS",
          "references": [
            "4da23bc8-8473-4ba4-a01e-74563614e3ea",
            "8ba43087-2bfe-434e-8a85-370fadd4bba6"
          ]
        },
        {
          "uuid": "e70d36bf-ad7a-4775-8ed0-fe7eecd70c7b",
          "code": "61945",
          "type": "PRIMARY",
          "url": "https://pubchem.ncbi.nlm.nih.gov/compound/61945",
          "code_system": "PUBCHEM",
          "references": [
            "4da23bc8-8473-4ba4-a01e-74563614e3ea"
          ]
        },
        {
          "uuid": "ce7a6e32-d603-7634-aa26-ae9a3d1e73d9",
          "code": "DTXSID2025977",
          "type": "PRIMARY",
          "url": "https://comptox.epa.gov/dashboard/chemical/details/DTXSID2025977",
          "code_system": "EPA CompTox",
          "references": [
            "95aee8e8-6754-d174-bee4-26166989ad28"
          ]
        },
        {
          "uuid": "a2f1ad8f-03ba-46f4-be68-8a11c315ad55",
          "code": "F7I6G0E56F",
          "type": "PRIMARY",
          "code_system": "FDA UNII"
        },
        {
          "uuid": "57c16afe-350f-cb7e-751a-d24c963b2c69",
          "code": "835",
          "type": "PRIMARY",
          "url": "https://www.fao.org/food/food-safety-quality/scientific-advice/jecfa/jecfa-flav/details/en/c/835/",
          "code_system": "JECFA MONOGRAPH",
          "references": [
            "4b4744c5-0a3a-b5f9-560a-473ed34c5b70"
          ]
        }
      ],
      "substance_class": "chemical",
      "names": [
        {
          "uuid": "9bce2f5b-1f9e-4b59-88e8-7a953cb8b22b",
          "name": "2-(PYRAZIN-2-YL)ETHANETHIOL",
          "stdName": "2-(PYRAZIN-2-YL)ETHANETHIOL",
          "type": "sys",
          "languages": [
            "en"
          ],
          "preferred": false,
          "references": [
            "225d93e2-1df4-479c-858d-5847ce6ae65d",
            "83e86937-1ef0-4508-b3a3-95e2195fea89"
          ],
          "display_name": false
        },
        {
          "uuid": "8e74ffe7-9782-4515-ba90-217e5868cdf7",
          "name": "2-PYRAZINEETHANETHIOL",
          "stdName": "2-PYRAZINEETHANETHIOL",
          "type": "sys",
          "languages": [
            "en"
          ],
          "preferred": false,
          "references": [
            "225d93e2-1df4-479c-858d-5847ce6ae65d",
            "83e86937-1ef0-4508-b3a3-95e2195fea89"
          ],
          "display_name": false
        },
        {
          "uuid": "f12b75ca-f73a-4b5b-9107-1c69e208c14c",
          "name": "2-PYRAZINYLETHANETHIOL",
          "stdName": "2-PYRAZINYLETHANETHIOL",
          "type": "sys",
          "languages": [
            "en"
          ],
          "preferred": false,
          "references": [
            "225d93e2-1df4-479c-858d-5847ce6ae65d",
            "a5e2f407-b379-4c3c-85df-ff5a0d154e31"
          ],
          "display_name": false
        },
        {
          "uuid": "9c012991-2c60-4fd9-8878-05cba2e5cdd9",
          "name": "ETHANETHIOL, 2-PYRAZINYL-",
          "stdName": "ETHANETHIOL, 2-PYRAZINYL-",
          "type": "sys",
          "languages": [
            "en"
          ],
          "preferred": false,
          "references": [
            "225d93e2-1df4-479c-858d-5847ce6ae65d",
            "a5e2f407-b379-4c3c-85df-ff5a0d154e31"
          ],
          "display_name": false
        },
        {
          "uuid": "2371ed85-8386-4227-802e-8734d3a7f3b7",
          "name": "FEMA NO. 3230",
          "stdName": "FEMA NO. 3230",
          "type": "cd",
          "languages": [
            "en"
          ],
          "preferred": false,
          "references": [
            "51f7d93e-7dde-483e-a6ea-6479bf420322"
          ],
          "display_name": false
        },
        {
          "uuid": "79f0f0d3-8dee-4d76-9275-dcc241728ff3",
          "name": "MERCAPTOETHYLPYRAZINE",
          "stdName": "MERCAPTOETHYLPYRAZINE",
          "type": "sys",
          "languages": [
            "en"
          ],
          "preferred": false,
          "references": [
            "225d93e2-1df4-479c-858d-5847ce6ae65d",
            "83e86937-1ef0-4508-b3a3-95e2195fea89"
          ],
          "display_name": false
        },
        {
          "uuid": "b2aaacc6-941e-464e-ad2b-b616d10c3812",
          "name": "PYRAZINE ETHANETHIOL",
          "stdName": "PYRAZINE ETHANETHIOL",
          "type": "sys",
          "languages": [
            "en"
          ],
          "preferred": false,
          "references": [
            "d3e182fa-4fac-4c55-947e-bef76fa14012",
            "225d93e2-1df4-479c-858d-5847ce6ae65d",
            "c452eb0f-b74a-4dca-a3d7-77896f07a456",
            "389b05e9-53ba-4dc6-a152-dd737d9c29cd"
          ],
          "display_name": false
        },
        {
          "uuid": "8eccb4ff-56f1-4c92-aba2-a0cbb4d2992d",
          "name": "PYRAZINE ETHANETHIOL [FHFI]",
          "stdName": "PYRAZINE ETHANETHIOL [FHFI]",
          "type": "cn",
          "languages": [
            "en"
          ],
          "preferred": false,
          "references": [
            "d3e182fa-4fac-4c55-947e-bef76fa14012",
            "225d93e2-1df4-479c-858d-5847ce6ae65d"
          ],
          "display_name": false
        },
        {
          "uuid": "184e83d2-a5b5-4eaa-837e-6520a4c5e041",
          "name": "PYRAZINEETHANETHIOL",
          "stdName": "PYRAZINEETHANETHIOL",
          "type": "sys",
          "languages": [
            "en"
          ],
          "preferred": false,
          "references": [
            "225d93e2-1df4-479c-858d-5847ce6ae65d",
            "83e86937-1ef0-4508-b3a3-95e2195fea89"
          ],
          "display_name": true
        },
        {
          "uuid": "e70f1b9a-fa0b-4f6f-b055-6a249f3251fb",
          "name": "PYRAZINYLETHYLMERCAPTAN",
          "stdName": "PYRAZINYLETHYLMERCAPTAN",
          "type": "sys",
          "languages": [
            "en"
          ],
          "preferred": false,
          "references": [
            "225d93e2-1df4-479c-858d-5847ce6ae65d",
            "83e86937-1ef0-4508-b3a3-95e2195fea89"
          ],
          "display_name": false
        }
      ],
      "references": [
        {
          "uuid": "d3e182fa-4fac-4c55-947e-bef76fa14012",
          "citation": "FHFI",
          "doc_type": "SRS",
          "public_domain": true,
          "tags": [
            "NOMEN"
          ]
        },
        {
          "uuid": "4da23bc8-8473-4ba4-a01e-74563614e3ea",
          "citation": "SRS CODE IMPORT",
          "doc_type": "SRS",
          "public_domain": true,
          "document_date": 1493390946000,
          "tags": [
            "NOMEN"
          ]
        },
        {
          "uuid": "5799d195-5c64-4624-8c5e-bfa71bc768e3",
          "citation": "SRS import [F7I6G0E56F]",
          "url": "http://fdasis.nlm.nih.gov/srs/srsdirect.jsp?regno=F7I6G0E56F",
          "doc_type": "SRS",
          "public_domain": true,
          "document_date": 1493390946000,
          "tags": [
            "NOMEN"
          ]
        },
        {
          "uuid": "c452eb0f-b74a-4dca-a3d7-77896f07a456",
          "citation": "PYRAZINE ETHANETHIOL [FHFI]",
          "doc_type": "SRS_LOCATOR",
          "public_domain": true
        },
        {
          "uuid": "389b05e9-53ba-4dc6-a152-dd737d9c29cd",
          "citation": "ICSAS BATCH 2010",
          "doc_type": "SRS",
          "public_domain": true,
          "tags": [
            "NOMEN",
            "PUBLIC_DOMAIN_RELEASE",
            "AUTO_SELECTED"
          ]
        },
        {
          "uuid": "51f7d93e-7dde-483e-a6ea-6479bf420322",
          "citation": "CHEMID 2010",
          "doc_type": "SRS",
          "public_domain": true,
          "tags": [
            "NOMEN"
          ]
        },
        {
          "uuid": "83e86937-1ef0-4508-b3a3-95e2195fea89",
          "citation": "STN",
          "doc_type": "SRS",
          "public_domain": true,
          "tags": [
            "NOMEN"
          ]
        },
        {
          "uuid": "225d93e2-1df4-479c-858d-5847ce6ae65d",
          "citation": "STN (SCIFINDER)",
          "doc_type": "STN (SCIFINDER)",
          "public_domain": true,
          "tags": [
            "NOMEN"
          ]
        },
        {
          "uuid": "a5e2f407-b379-4c3c-85df-ff5a0d154e31",
          "citation": "CHEMID",
          "doc_type": "SRS",
          "public_domain": true,
          "tags": [
            "NOMEN"
          ]
        },
        {
          "uuid": "95aee8e8-6754-d174-bee4-26166989ad28",
          "citation": "WEBSITE",
          "url": "https://comptox.epa.gov/dashboard/dsstoxdb/results?utf8=%E2%9C%93&search=35250-53-4",
          "doc_type": "WEBSITE",
          "public_domain": true,
          "tags": [
            "NOMEN",
            "PUBLIC_DOMAIN_RELEASE"
          ]
        },
        {
          "uuid": "8ba43087-2bfe-434e-8a85-370fadd4bba6",
          "citation": "STN",
          "doc_type": "STN (SCIFINDER)",
          "public_domain": true
        },
        {
          "uuid": "4b4744c5-0a3a-b5f9-560a-473ed34c5b70",
          "citation": "JECFA",
          "doc_type": "JECFA",
          "public_domain": true
        }
      ],
      "definition_type": "PRIMARY",
      "moieties": [
        {
          "uuid": "153d0a7a-aa76-4ed5-afb7-11070af48467",
          "id": "153d0a7a-aa76-4ed5-afb7-11070af48467",
          "molfile": "\n  Marvin  01132101182D          \n\n  9  9  0  0  0  0            999 V2000\n    8.5343   -4.3251    0.0000 S   0  0  0  0  0  0  0  0  0  0  0  0\n    7.8198   -4.7416    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0\n    7.1094   -4.3327    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0\n    6.3995   -4.7491    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0\n    6.3995   -5.5746    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0\n    5.6850   -5.9874    0.0000 N   0  0  0  0  0  0  0  0  0  0  0  0\n    4.9707   -5.5785    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0\n    4.9707   -4.7530    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0\n    5.6850   -4.3402    0.0000 N   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  4  5  1  0  0  0  0\n  4  9  2  0  0  0  0\n  5  6  2  0  0  0  0\n  6  7  1  0  0  0  0\n  8  7  2  0  0  0  0\n  9  8  1  0  0  0  0\nM  END",
          "smiles": "C(CS)c1cnccn1",
          "formula": "C6H8N2S",
          "atropisomerism": "No",
          "charge": 0,
          "count": 1,
          "stereochemistry": "ACHIRAL",
          "count_amount": {
            "type": "MOL RATIO",
            "average": 1,
            "units": "MOL RATIO",
            "uuid": "15cbbfd4-1b5d-480f-a331-7a52278e735c"
          },
          "defined_stereo": 0,
          "ez_centers": 0,
          "molecular_weight": "140.2074",
          "optical_activity": "NONE",
          "stereo_centers": 0
        }
      ],
      "definition_level": "COMPLETE",
      "uuid": "50bcd6f6-880c-43cf-9e31-fca0678c2188",
      "version": "4",
      "structure": {
        "id": "7b17b6ce-1c98-49b0-961c-13d993036eb8",
        "molfile": "\n  Marvin  01132106242D          \n\n  9  9  0  0  0  0            999 V2000\n    6.3995   -4.7491    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0\n    6.3995   -5.5746    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0\n    5.6850   -5.9874    0.0000 N   0  0  0  0  0  0  0  0  0  0  0  0\n    4.9707   -5.5785    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0\n    4.9707   -4.7530    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0\n    5.6850   -4.3402    0.0000 N   0  0  0  0  0  0  0  0  0  0  0  0\n    7.1094   -4.3327    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0\n    7.8198   -4.7416    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0\n    8.5343   -4.3251    0.0000 S   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  3  4  1  0  0  0  0\n  5  4  2  0  0  0  0\n  6  5  1  0  0  0  0\n  1  6  2  0  0  0  0\n  1  7  1  0  0  0  0\n  7  8  1  0  0  0  0\n  8  9  1  0  0  0  0\nM  END",
        "smiles": "C(CS)c1cnccn1",
        "formula": "C6H8N2S",
        "atropisomerism": "No",
        "charge": 0,
        "count": 1,
        "stereochemistry": "ACHIRAL",
        "defined_stereo": 0,
        "ez_centers": 0,
        "molecular_weight": "140.2074",
        "optical_activity": "NONE",
        "references": [
          "51f7d93e-7dde-483e-a6ea-6479bf420322",
          "5799d195-5c64-4624-8c5e-bfa71bc768e3"
        ],
        "stereo_centers": 0
      },
      "unii": "F7I6G0E56F"
    }
  ]
}