{
  "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": "e45a71df-d32f-4282-ba78-0207f2bd09b5",
          "code": "13925-08-1",
          "type": "PRIMARY",
          "url": "https://commonchemistry.cas.org/detail?cas_rn=13925-08-1",
          "code_system": "CAS",
          "references": [
            "2bc3a3ce-b474-447e-850e-92fd112bd234",
            "245c442f-943f-4dd1-aa0d-b152bf075c0f"
          ]
        },
        {
          "uuid": "fb3c1efb-41ce-45af-8434-a9cf88c7ff0e",
          "code": "2-METHYL-5-VINYLPYRAZINE",
          "comments": "JECFA|FUNCTIONAL CLASSIFICATION|Flavouring Agent",
          "type": "PRIMARY",
          "url": "http://apps.who.int/food-additives-contaminants-jecfa-database/chemical.aspx?chemID=6125",
          "code_system": "JECFA EVALUATION",
          "references": [
            "2bc3a3ce-b474-447e-850e-92fd112bd234"
          ]
        },
        {
          "uuid": "46df4e0d-4184-4732-a9e6-711d6b138a5f",
          "code": "26335",
          "type": "PRIMARY",
          "url": "https://pubchem.ncbi.nlm.nih.gov/compound/26335",
          "code_system": "PUBCHEM",
          "references": [
            "2bc3a3ce-b474-447e-850e-92fd112bd234"
          ]
        },
        {
          "uuid": "4134cebe-60a4-ce31-f84b-4ffc03937e05",
          "code": "DTXSID6065680",
          "type": "PRIMARY",
          "url": "https://comptox.epa.gov/dashboard/chemical/details/DTXSID6065680",
          "code_system": "EPA CompTox",
          "references": [
            "5cb85add-c443-5c04-43d3-a5daaf68a4de"
          ]
        },
        {
          "uuid": "470c5175-2366-4836-ada1-959770eb1798",
          "code": "11651I3458",
          "type": "PRIMARY",
          "code_system": "FDA UNII"
        },
        {
          "uuid": "62e6ba6d-4823-b73b-22c7-1286e0476160",
          "code": "2103",
          "type": "PRIMARY",
          "url": "https://www.fao.org/food/food-safety-quality/scientific-advice/jecfa/jecfa-flav/details/en/c/2103/",
          "code_system": "JECFA MONOGRAPH",
          "references": [
            "a4f1169d-1a7e-3e60-bda0-c1ed566aa70d"
          ]
        }
      ],
      "substance_class": "chemical",
      "names": [
        {
          "uuid": "98b2a422-38f6-49c6-8974-2a5d64e44f08",
          "name": "2-ETHENYL-5-METHYLPYRAZINE",
          "stdName": "2-ETHENYL-5-METHYLPYRAZINE",
          "type": "sys",
          "languages": [
            "en"
          ],
          "preferred": false,
          "references": [
            "1b4d2e48-3b1b-4a03-9da9-37a5eceeab8a",
            "0f588dcf-22b8-4d8f-ab4d-eefdac91b4d1"
          ],
          "display_name": false
        },
        {
          "uuid": "f9672b74-de88-49a8-aa51-86feb6ada373",
          "name": "2-METHYL-5-VINYLPYRAZINE",
          "stdName": "2-METHYL-5-VINYLPYRAZINE",
          "type": "sys",
          "languages": [
            "en"
          ],
          "preferred": false,
          "references": [
            "1b4d2e48-3b1b-4a03-9da9-37a5eceeab8a",
            "1cc6c23e-cc02-4441-9f99-2817e59fedf2",
            "6927dc35-0979-421e-b8ef-398cf93c1234",
            "0f588dcf-22b8-4d8f-ab4d-eefdac91b4d1"
          ],
          "display_name": true
        },
        {
          "uuid": "287ac171-70c2-44bc-8b53-6efb0b9681d8",
          "name": "2-METHYL-5-VINYLPYRAZINE [FHFI]",
          "stdName": "2-METHYL-5-VINYLPYRAZINE [FHFI]",
          "type": "cn",
          "languages": [
            "en"
          ],
          "preferred": false,
          "references": [
            "1cc6c23e-cc02-4441-9f99-2817e59fedf2",
            "0f588dcf-22b8-4d8f-ab4d-eefdac91b4d1"
          ],
          "display_name": false
        },
        {
          "uuid": "cbe9c0a0-2214-41a8-9bb9-374867834e02",
          "name": "2-VINYL-5-METHYLPYRAZINE",
          "stdName": "2-VINYL-5-METHYLPYRAZINE",
          "type": "sys",
          "languages": [
            "en"
          ],
          "preferred": false,
          "references": [
            "1b4d2e48-3b1b-4a03-9da9-37a5eceeab8a",
            "0f588dcf-22b8-4d8f-ab4d-eefdac91b4d1"
          ],
          "display_name": false
        },
        {
          "uuid": "7bc84ed0-4314-46e3-b02d-a4a4a439d499",
          "name": "5-METHYL-2-VINYLPYRAZINE",
          "stdName": "5-METHYL-2-VINYLPYRAZINE",
          "type": "sys",
          "languages": [
            "en"
          ],
          "preferred": false,
          "references": [
            "1b4d2e48-3b1b-4a03-9da9-37a5eceeab8a",
            "0f588dcf-22b8-4d8f-ab4d-eefdac91b4d1"
          ],
          "display_name": false
        },
        {
          "uuid": "d2e3585a-9fff-4a01-81f7-9bdd9ead80de",
          "name": "FEMA NO. 3211",
          "stdName": "FEMA NO. 3211",
          "type": "cd",
          "languages": [
            "en"
          ],
          "preferred": false,
          "references": [
            "687fe0b8-0c3b-4b49-bbd6-3c2f6e5221d9",
            "0f588dcf-22b8-4d8f-ab4d-eefdac91b4d1"
          ],
          "display_name": false
        },
        {
          "uuid": "7f973b8e-3ddd-41c5-9652-8a40e463eca4",
          "name": "PYRAZINE, 2-ETHENYL-5-METHYL-",
          "stdName": "PYRAZINE, 2-ETHENYL-5-METHYL-",
          "type": "sys",
          "languages": [
            "en"
          ],
          "preferred": false,
          "references": [
            "1b4d2e48-3b1b-4a03-9da9-37a5eceeab8a",
            "0f588dcf-22b8-4d8f-ab4d-eefdac91b4d1"
          ],
          "display_name": false
        },
        {
          "uuid": "6c9122bf-d752-4ac2-be86-5e7aa48539fd",
          "name": "PYRAZINE, 2-METHYL-5-VINYL-",
          "stdName": "PYRAZINE, 2-METHYL-5-VINYL-",
          "type": "sys",
          "languages": [
            "en"
          ],
          "preferred": false,
          "references": [
            "1b4d2e48-3b1b-4a03-9da9-37a5eceeab8a",
            "0f588dcf-22b8-4d8f-ab4d-eefdac91b4d1"
          ],
          "display_name": false
        }
      ],
      "references": [
        {
          "uuid": "1b4d2e48-3b1b-4a03-9da9-37a5eceeab8a",
          "citation": "STN",
          "doc_type": "SRS",
          "public_domain": true,
          "tags": [
            "NOMEN",
            "PUBLIC_DOMAIN_RELEASE",
            "AUTO_SELECTED"
          ]
        },
        {
          "uuid": "687fe0b8-0c3b-4b49-bbd6-3c2f6e5221d9",
          "citation": "http://books.google.com/books?id=A8OyTzGGJhYC&pg=PR8&lpg=PR8&dq=FEMA+NO.+2016&source=bl&ots=YeCxYNFn",
          "url": "http://books.google.com/books?id=A8OyTzGGJhYC&pg=PR8&lpg=PR8&dq=FEMA+NO.+2016&source=bl&ots=YeCxYNFn",
          "doc_type": "SRS",
          "public_domain": true,
          "tags": [
            "NOMEN"
          ]
        },
        {
          "uuid": "0f588dcf-22b8-4d8f-ab4d-eefdac91b4d1",
          "citation": "WEB PAGE",
          "doc_type": "WEB PAGE",
          "public_domain": true,
          "tags": [
            "NOMEN"
          ]
        },
        {
          "uuid": "1cc6c23e-cc02-4441-9f99-2817e59fedf2",
          "citation": "FHFI",
          "doc_type": "SRS",
          "public_domain": true,
          "tags": [
            "NOMEN"
          ]
        },
        {
          "uuid": "2bc3a3ce-b474-447e-850e-92fd112bd234",
          "citation": "SRS CODE IMPORT",
          "doc_type": "SRS",
          "public_domain": true,
          "document_date": 1493390992000,
          "tags": [
            "NOMEN"
          ]
        },
        {
          "uuid": "79b4d923-0bb7-4830-9a71-c68e452a6cfe",
          "citation": "SRS import [11651I3458]",
          "url": "http://fdasis.nlm.nih.gov/srs/srsdirect.jsp?regno=11651I3458",
          "doc_type": "SRS",
          "public_domain": true,
          "document_date": 1493390992000,
          "tags": [
            "NOMEN"
          ]
        },
        {
          "uuid": "fb81092e-d0aa-4cb8-82b3-144c0af82d1f",
          "citation": "CHEMID  2011",
          "doc_type": "SRS",
          "public_domain": true,
          "tags": [
            "NOMEN"
          ]
        },
        {
          "uuid": "6927dc35-0979-421e-b8ef-398cf93c1234",
          "citation": "2-METHYL-5-VINYLPYRAZINE [FHFI]",
          "doc_type": "SRS_LOCATOR",
          "public_domain": true
        },
        {
          "uuid": "5cb85add-c443-5c04-43d3-a5daaf68a4de",
          "citation": "WEBSITE",
          "url": "https://comptox.epa.gov/dashboard/dsstoxdb/results?utf8=%E2%9C%93&search=13925-08-1",
          "doc_type": "WEBSITE",
          "public_domain": true,
          "tags": [
            "NOMEN",
            "PUBLIC_DOMAIN_RELEASE"
          ]
        },
        {
          "uuid": "245c442f-943f-4dd1-aa0d-b152bf075c0f",
          "citation": "STN",
          "doc_type": "STN (SCIFINDER)",
          "public_domain": true
        },
        {
          "uuid": "a4f1169d-1a7e-3e60-bda0-c1ed566aa70d",
          "citation": "JECFA",
          "doc_type": "JECFA",
          "public_domain": true
        }
      ],
      "definition_type": "PRIMARY",
      "moieties": [
        {
          "uuid": "a99d2438-b8c0-4ead-97c4-e0b5a44c41cd",
          "id": "a99d2438-b8c0-4ead-97c4-e0b5a44c41cd",
          "molfile": "\n  Marvin  01132108482D          \n\n  9  9  0  0  0  0            999 V2000\n    8.6118   -4.1729    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0\n    7.8994   -4.5882    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0\n    7.8994   -5.4203    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0\n    7.1883   -5.8183    0.0000 N   0  0  0  0  0  0  0  0  0  0  0  0\n    6.4812   -5.4136    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0\n    5.7555   -5.8302    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0\n    5.0497   -5.4203    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0\n    6.4812   -4.5882    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0\n    7.1978   -4.1910    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  9  2  2  0  0  0  0\n  4  3  2  0  0  0  0\n  5  4  1  0  0  0  0\n  5  6  1  0  0  0  0\n  5  8  2  0  0  0  0\n  6  7  2  0  0  0  0\n  8  9  1  0  0  0  0\nM  END",
          "smiles": "C=Cc1cnc(C)cn1",
          "formula": "C7H8N2",
          "atropisomerism": "No",
          "charge": 0,
          "count": 1,
          "stereochemistry": "ACHIRAL",
          "count_amount": {
            "type": "MOL RATIO",
            "average": 1,
            "units": "MOL RATIO",
            "uuid": "c57a1a0a-5f61-47be-bb31-82742b9cc38c"
          },
          "defined_stereo": 0,
          "ez_centers": 0,
          "molecular_weight": "120.1521",
          "optical_activity": "NONE",
          "stereo_centers": 0
        }
      ],
      "definition_level": "COMPLETE",
      "uuid": "420ec815-2d98-4ca6-a35f-9349d5d59bde",
      "version": "5",
      "structure": {
        "id": "501a4312-fa56-4393-8a70-b093443afe52",
        "molfile": "\n  Marvin  01132104112D          \n\n  9  9  0  0  0  0            999 V2000\n    6.4812   -5.4136    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0\n    6.4812   -4.5882    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0\n    7.1978   -4.1910    0.0000 N   0  0  0  0  0  0  0  0  0  0  0  0\n    7.8994   -4.5882    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0\n    8.6118   -4.1729    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0\n    7.8994   -5.4203    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0\n    7.1883   -5.8183    0.0000 N   0  0  0  0  0  0  0  0  0  0  0  0\n    5.7555   -5.8302    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0\n    5.0497   -5.4203    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  2  0  0  0  0\n  3  4  1  0  0  0  0\n  4  5  1  0  0  0  0\n  6  4  2  0  0  0  0\n  7  6  1  0  0  0  0\n  1  7  2  0  0  0  0\n  1  8  1  0  0  0  0\n  8  9  2  0  0  0  0\nM  END",
        "smiles": "C=Cc1cnc(C)cn1",
        "formula": "C7H8N2",
        "atropisomerism": "No",
        "charge": 0,
        "count": 1,
        "stereochemistry": "ACHIRAL",
        "defined_stereo": 0,
        "ez_centers": 0,
        "molecular_weight": "120.1521",
        "optical_activity": "NONE",
        "references": [
          "79b4d923-0bb7-4830-9a71-c68e452a6cfe",
          "fb81092e-d0aa-4cb8-82b3-144c0af82d1f"
        ],
        "stereo_centers": 0
      },
      "unii": "11651I3458"
    }
  ]
}