{
  "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": "05a6f89e-87f4-41c1-8c7d-c8794ab76ee1",
          "code": "7976",
          "type": "PRIMARY",
          "url": "https://pubchem.ncbi.nlm.nih.gov/compound/7976",
          "code_system": "PUBCHEM",
          "references": [
            "be8b672d-847c-4114-9b27-045d5c3e4773"
          ]
        },
        {
          "uuid": "eb6538a1-15c7-4d94-99cb-6c55ee43df44",
          "code": "109-08-0",
          "type": "PRIMARY",
          "url": "https://commonchemistry.cas.org/detail?cas_rn=109-08-0",
          "code_system": "CAS",
          "references": [
            "be8b672d-847c-4114-9b27-045d5c3e4773",
            "05937469-f0cc-4c61-8728-37c1ca913570"
          ]
        },
        {
          "uuid": "bfa165dd-cdfa-4ffa-9fb0-7afdaa7a7b23",
          "code": "2-METHYLPYRAZINE",
          "comments": "JECFA|FUNCTIONAL CLASSIFICATION|Flavouring Agent",
          "type": "PRIMARY",
          "url": "http://apps.who.int/food-additives-contaminants-jecfa-database/chemical.aspx?chemID=3406",
          "code_system": "JECFA EVALUATION",
          "references": [
            "be8b672d-847c-4114-9b27-045d5c3e4773"
          ]
        },
        {
          "uuid": "edce715c-b43d-47c8-b45c-27f3ac388ee8",
          "code": "203-645-8",
          "type": "PRIMARY",
          "url": "https://echa.europa.eu/substance-information/-/substanceinfo/100.003.315",
          "code_system": "ECHA (EC/EINECS)",
          "references": [
            "be8b672d-847c-4114-9b27-045d5c3e4773"
          ]
        },
        {
          "uuid": "f4aba40f-ce02-eef0-a568-c515f23a325e",
          "code": "DTXSID4047620",
          "type": "PRIMARY",
          "url": "https://comptox.epa.gov/dashboard/chemical/details/DTXSID4047620",
          "code_system": "EPA CompTox",
          "references": [
            "c0c9329b-1119-8ee8-0489-c8dffae2d72c"
          ]
        },
        {
          "uuid": "9390280d-6281-405b-b22d-6dff5393f1df",
          "code": "RVC6500U9C",
          "type": "PRIMARY",
          "code_system": "FDA UNII"
        },
        {
          "uuid": "babba83a-2113-1af7-760b-ca932f0b83e6",
          "code": "30412",
          "type": "PRIMARY",
          "url": "https://dtp.cancer.gov/dtpstandard/servlet/dwindex?searchtype=NSC&outputformat=html&searchlist=30412",
          "code_system": "NSC",
          "references": [
            "55624f6d-df4a-d51d-5d40-6f411a130275"
          ]
        },
        {
          "uuid": "1b325e35-1a9d-ed8d-e914-2c80e2716d6a",
          "code": "49138",
          "type": "PRIMARY",
          "url": "https://dtp.cancer.gov/dtpstandard/servlet/dwindex?searchtype=NSC&outputformat=html&searchlist=49138",
          "code_system": "NSC",
          "references": [
            "55624f6d-df4a-d51d-5d40-6f411a130275"
          ]
        },
        {
          "uuid": "a0d1b956-641c-cd22-f9d0-d758a62ef2c2",
          "code": "848",
          "type": "PRIMARY",
          "url": "https://www.fao.org/food/food-safety-quality/scientific-advice/jecfa/jecfa-flav/details/en/c/848/",
          "code_system": "JECFA MONOGRAPH",
          "references": [
            "6dabc2f5-f931-fc68-8b61-ddbf831648ad"
          ]
        }
      ],
      "substance_class": "chemical",
      "names": [
        {
          "uuid": "1992b0ba-7ae0-4de0-b38d-1c3bcd8d6e4d",
          "name": "2-METHYL-1,4-DIAZINE",
          "stdName": "2-METHYL-1,4-DIAZINE",
          "type": "sys",
          "languages": [
            "en"
          ],
          "preferred": false,
          "references": [
            "03579e77-4cf6-489c-a520-599be844c6f1",
            "28793e06-9438-45a1-a6b2-6afa11a92e91"
          ],
          "display_name": false
        },
        {
          "uuid": "07d2330c-0641-47ae-8eae-dafe37c052c0",
          "name": "2-METHYLPYRAZINE",
          "stdName": "2-METHYLPYRAZINE",
          "type": "sys",
          "languages": [
            "en"
          ],
          "preferred": false,
          "references": [
            "6ebf079d-d051-403e-b3a5-0c8fdf5529c5",
            "9d118295-642e-4fe2-8887-b021d84b3a70",
            "c87d6179-77e1-4bd6-88e6-0f7c12704891",
            "28793e06-9438-45a1-a6b2-6afa11a92e91",
            "ee9413c2-ce78-460b-8ee1-47e931f469e4",
            "77fa6064-99d8-4a2b-a140-f91e779b9b0d"
          ],
          "display_name": true
        },
        {
          "uuid": "5f20a9c1-9a1b-41cd-ad6f-7b6f0e0b4567",
          "name": "2-METHYLPYRAZINE [FCC]",
          "stdName": "2-METHYLPYRAZINE [FCC]",
          "type": "cn",
          "languages": [
            "en"
          ],
          "preferred": false,
          "references": [
            "c87d6179-77e1-4bd6-88e6-0f7c12704891",
            "28793e06-9438-45a1-a6b2-6afa11a92e91"
          ],
          "display_name": false
        },
        {
          "uuid": "8ec966c9-584c-4062-91b5-9de22ea811c0",
          "name": "2-METHYLPYRAZINE [FHFI]",
          "stdName": "2-METHYLPYRAZINE [FHFI]",
          "type": "cn",
          "languages": [
            "en"
          ],
          "preferred": false,
          "references": [
            "6ebf079d-d051-403e-b3a5-0c8fdf5529c5",
            "28793e06-9438-45a1-a6b2-6afa11a92e91"
          ],
          "display_name": false
        },
        {
          "uuid": "1953fb9c-266f-4f4f-8f33-2d1f0831a8c6",
          "name": "FEMA NO. 3309",
          "stdName": "FEMA NO. 3309",
          "type": "cd",
          "languages": [
            "en"
          ],
          "preferred": false,
          "references": [
            "9d118295-642e-4fe2-8887-b021d84b3a70",
            "28793e06-9438-45a1-a6b2-6afa11a92e91"
          ],
          "display_name": false
        },
        {
          "uuid": "6b4c1097-71f0-46d8-9330-5e1f82546843",
          "name": "METHYLPYRAZINE",
          "stdName": "METHYLPYRAZINE",
          "type": "sys",
          "languages": [
            "en"
          ],
          "preferred": false,
          "references": [
            "03579e77-4cf6-489c-a520-599be844c6f1",
            "28793e06-9438-45a1-a6b2-6afa11a92e91"
          ],
          "display_name": false
        },
        {
          "uuid": "bde9acb7-2c3b-4206-9bc8-fe4f6452feda",
          "name": "MONOMETHYLPYRAZINE",
          "stdName": "MONOMETHYLPYRAZINE",
          "type": "sys",
          "languages": [
            "en"
          ],
          "preferred": false,
          "references": [
            "0a2f2483-1fe4-4f40-827b-b8122c7462b4",
            "28793e06-9438-45a1-a6b2-6afa11a92e91"
          ],
          "display_name": false
        },
        {
          "uuid": "5e29b771-505d-4232-aee9-5c981cd62823",
          "name": "NSC-30412",
          "stdName": "NSC-30412",
          "type": "cd",
          "languages": [
            "en"
          ],
          "preferred": false,
          "references": [
            "0a2f2483-1fe4-4f40-827b-b8122c7462b4",
            "28793e06-9438-45a1-a6b2-6afa11a92e91"
          ],
          "display_name": false
        },
        {
          "uuid": "97f1700b-59d9-4663-99a5-e1dd50b7c9df",
          "name": "NSC-49138",
          "stdName": "NSC-49138",
          "type": "cd",
          "languages": [
            "en"
          ],
          "preferred": false,
          "references": [
            "0a2f2483-1fe4-4f40-827b-b8122c7462b4",
            "28793e06-9438-45a1-a6b2-6afa11a92e91"
          ],
          "display_name": false
        },
        {
          "uuid": "f0699797-fe71-483a-acfe-b84548eba7fc",
          "name": "PYRAZINE, 2-METHYL",
          "stdName": "PYRAZINE, 2-METHYL",
          "type": "cn",
          "languages": [
            "en"
          ],
          "preferred": false,
          "references": [
            "1563d954-777f-4622-9c23-6db609eea31f",
            "28793e06-9438-45a1-a6b2-6afa11a92e91"
          ],
          "display_name": false
        },
        {
          "uuid": "18e87fb2-f880-4884-a118-72bb1eaaca37",
          "name": "PYRAZINE, METHYL-",
          "stdName": "PYRAZINE, METHYL-",
          "type": "sys",
          "languages": [
            "en"
          ],
          "preferred": false,
          "references": [
            "03579e77-4cf6-489c-a520-599be844c6f1",
            "28793e06-9438-45a1-a6b2-6afa11a92e91"
          ],
          "display_name": false
        }
      ],
      "references": [
        {
          "uuid": "9d118295-642e-4fe2-8887-b021d84b3a70",
          "citation": "SAX",
          "doc_type": "SRS",
          "public_domain": true,
          "tags": [
            "NOMEN",
            "PUBLIC_DOMAIN_RELEASE",
            "AUTO_SELECTED"
          ]
        },
        {
          "uuid": "28793e06-9438-45a1-a6b2-6afa11a92e91",
          "citation": "SAX DANGEROUS PROPERTIES",
          "doc_type": "SAX DANGEROUS PROPERTIES",
          "public_domain": true,
          "tags": [
            "NOMEN"
          ]
        },
        {
          "uuid": "1563d954-777f-4622-9c23-6db609eea31f",
          "citation": "HFF",
          "doc_type": "SRS",
          "public_domain": true,
          "tags": [
            "NOMEN"
          ]
        },
        {
          "uuid": "03579e77-4cf6-489c-a520-599be844c6f1",
          "citation": "ChemID",
          "doc_type": "SRS",
          "public_domain": true,
          "tags": [
            "NOMEN"
          ]
        },
        {
          "uuid": "6ebf079d-d051-403e-b3a5-0c8fdf5529c5",
          "citation": "FHFI",
          "doc_type": "SRS",
          "public_domain": true,
          "tags": [
            "NOMEN"
          ]
        },
        {
          "uuid": "c87d6179-77e1-4bd6-88e6-0f7c12704891",
          "citation": "FCC",
          "doc_type": "SRS",
          "public_domain": true,
          "tags": [
            "NOMEN"
          ]
        },
        {
          "uuid": "0a2f2483-1fe4-4f40-827b-b8122c7462b4",
          "citation": "SCIFINDER",
          "doc_type": "SRS",
          "public_domain": true,
          "tags": [
            "NOMEN"
          ]
        },
        {
          "uuid": "be8b672d-847c-4114-9b27-045d5c3e4773",
          "citation": "SRS CODE IMPORT",
          "doc_type": "SRS",
          "public_domain": true,
          "document_date": 1493390738000,
          "tags": [
            "NOMEN"
          ]
        },
        {
          "uuid": "2ad9c7a6-a8d0-4483-940a-3ff4c765df47",
          "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": "02462dc8-795d-4d63-b2ba-ec62831b247f",
          "citation": "SRS import [RVC6500U9C]",
          "url": "http://fdasis.nlm.nih.gov/srs/srsdirect.jsp?regno=RVC6500U9C",
          "doc_type": "SRS",
          "public_domain": true,
          "document_date": 1493390738000,
          "tags": [
            "NOMEN"
          ]
        },
        {
          "uuid": "ee9413c2-ce78-460b-8ee1-47e931f469e4",
          "citation": "2-METHYLPYRAZINE [FHFI]",
          "doc_type": "SRS_LOCATOR",
          "public_domain": true
        },
        {
          "uuid": "77fa6064-99d8-4a2b-a140-f91e779b9b0d",
          "citation": "2-METHYLPYRAZINE [FCC]",
          "doc_type": "SRS_LOCATOR",
          "public_domain": true
        },
        {
          "uuid": "c0c9329b-1119-8ee8-0489-c8dffae2d72c",
          "citation": "WEBSITE",
          "url": "https://comptox.epa.gov/dashboard/dsstoxdb/results?utf8=%E2%9C%93&search=109-08-0",
          "doc_type": "WEBSITE",
          "public_domain": true,
          "tags": [
            "NOMEN",
            "PUBLIC_DOMAIN_RELEASE"
          ]
        },
        {
          "uuid": "05937469-f0cc-4c61-8728-37c1ca913570",
          "citation": "STN",
          "doc_type": "STN (SCIFINDER)",
          "public_domain": true
        },
        {
          "uuid": "55624f6d-df4a-d51d-5d40-6f411a130275",
          "citation": "NCI",
          "doc_type": "NCI DRUG DICTIONARY",
          "public_domain": true
        },
        {
          "uuid": "6dabc2f5-f931-fc68-8b61-ddbf831648ad",
          "citation": "JECFA",
          "doc_type": "JECFA",
          "public_domain": true
        }
      ],
      "definition_type": "PRIMARY",
      "moieties": [
        {
          "uuid": "884b67fd-c0d2-44e7-9dd4-675b2159dcb3",
          "id": "884b67fd-c0d2-44e7-9dd4-675b2159dcb3",
          "molfile": "\n  Marvin  01132107042D          \n\n  7  7  0  0  0  0            999 V2000\n    2.6971   -0.3283    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0\n    1.9872   -0.7443    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0\n    1.9900   -1.5727    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0\n    1.2755   -1.9849    0.0000 N   0  0  0  0  0  0  0  0  0  0  0  0\n    0.5626   -1.5731    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0\n    0.5637   -0.7480    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0\n    1.2737   -0.3363    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  2  7  2  0  0  0  0\n  4  3  2  0  0  0  0\n  5  4  1  0  0  0  0\n  6  5  2  0  0  0  0\n  7  6  1  0  0  0  0\nM  END",
          "smiles": "Cc1cnccn1",
          "formula": "C5H6N2",
          "atropisomerism": "No",
          "charge": 0,
          "count": 1,
          "stereochemistry": "ACHIRAL",
          "count_amount": {
            "type": "MOL RATIO",
            "average": 1,
            "units": "MOL RATIO",
            "uuid": "f9b04266-ea23-48ef-b195-d2131be3597a"
          },
          "defined_stereo": 0,
          "ez_centers": 0,
          "molecular_weight": "94.1147",
          "optical_activity": "NONE",
          "stereo_centers": 0
        }
      ],
      "definition_level": "COMPLETE",
      "uuid": "e746c6b1-e05e-434b-af11-8f8d5dc07ec5",
      "version": "6",
      "structure": {
        "id": "996a2d9e-3c02-4b54-b0d7-7e1c3ed1ce72",
        "molfile": "\n  Marvin  01132107582D          \n\n  7  7  0  0  0  0            999 V2000\n    0.5637   -0.7480    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0\n    0.5626   -1.5731    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0\n    1.2755   -1.9849    0.0000 N   0  0  0  0  0  0  0  0  0  0  0  0\n    1.9900   -1.5727    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0\n    1.9872   -0.7443    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0\n    1.2737   -0.3363    0.0000 N   0  0  0  0  0  0  0  0  0  0  0  0\n    2.6971   -0.3283    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0\n  3  4  2  0  0  0  0\n  4  5  1  0  0  0  0\n  2  3  1  0  0  0  0\n  5  6  2  0  0  0  0\n  6  1  1  0  0  0  0\n  1  2  2  0  0  0  0\n  5  7  1  0  0  0  0\nM  END",
        "smiles": "Cc1cnccn1",
        "formula": "C5H6N2",
        "atropisomerism": "No",
        "charge": 0,
        "count": 1,
        "stereochemistry": "ACHIRAL",
        "defined_stereo": 0,
        "ez_centers": 0,
        "molecular_weight": "94.1147",
        "optical_activity": "NONE",
        "references": [
          "9d118295-642e-4fe2-8887-b021d84b3a70",
          "02462dc8-795d-4d63-b2ba-ec62831b247f"
        ],
        "stereo_centers": 0
      },
      "unii": "RVC6500U9C"
    }
  ]
}