{
  "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": "5430238e-369b-4de5-8630-b15ce4babe4d",
          "code": "475-71-8",
          "type": "PRIMARY",
          "url": "https://commonchemistry.cas.org/detail?cas_rn=475-71-8",
          "code_system": "CAS",
          "references": [
            "01b20f44-9649-42a9-a7bb-18c6466a0bb8",
            "161aaf3a-7eaa-456b-b8a4-d8531fd2160d"
          ]
        },
        {
          "uuid": "d2d73c48-5572-44ca-8c19-0ccca596c988",
          "code": "207-498-0",
          "type": "PRIMARY",
          "url": "https://echa.europa.eu/substance-information/-/substanceinfo/100.006.818",
          "code_system": "ECHA (EC/EINECS)",
          "references": [
            "01b20f44-9649-42a9-a7bb-18c6466a0bb8"
          ]
        },
        {
          "uuid": "41551ac9-c980-4c1a-b62f-fa9e5d5f95b8",
          "code": "68059",
          "type": "PRIMARY",
          "url": "https://pubchem.ncbi.nlm.nih.gov/compound/68059",
          "code_system": "PUBCHEM",
          "references": [
            "01b20f44-9649-42a9-a7bb-18c6466a0bb8"
          ]
        },
        {
          "uuid": "67df5170-3301-c4ab-3ac2-8b9925118186",
          "code": "DTXSID6060056",
          "type": "PRIMARY",
          "url": "https://comptox.epa.gov/dashboard/chemical/details/DTXSID6060056",
          "code_system": "EPA CompTox",
          "references": [
            "f8e3f374-4a61-a28f-770d-308fcacb5202"
          ]
        },
        {
          "uuid": "06d063ae-73aa-fe77-05ac-c43dc9d8d5a9",
          "code": "Vat Yellow 1",
          "type": "PRIMARY",
          "url": "https://en.wikipedia.org/wiki/Vat_Yellow_1",
          "code_system": "WIKIPEDIA",
          "references": [
            "66d44581-f197-87e2-2222-f1dd4c5fe371"
          ]
        },
        {
          "uuid": "f43201e8-892e-4ce4-b60c-03a0e032b19d",
          "code": "16091",
          "type": "PRIMARY",
          "url": "https://dtp.cancer.gov/dtpstandard/servlet/dwindex?searchtype=NSC&outputformat=html&searchlist=16091",
          "code_system": "NSC",
          "references": [
            "0c923922-93d5-bc83-a263-cf8f2bbdcff2"
          ]
        },
        {
          "uuid": "18942363-01bb-25ed-0087-aa73ecf82c3b",
          "code": "39910",
          "type": "PRIMARY",
          "url": "https://dtp.cancer.gov/dtpstandard/servlet/dwindex?searchtype=NSC&outputformat=html&searchlist=39910",
          "code_system": "NSC",
          "references": [
            "0c923922-93d5-bc83-a263-cf8f2bbdcff2"
          ]
        },
        {
          "uuid": "0fb11176-467c-4bba-a741-1475e77ce5bb",
          "code": "5FA52JAB7C",
          "type": "PRIMARY",
          "code_system": "FDA UNII"
        }
      ],
      "substance_class": "chemical",
      "names": [
        {
          "uuid": "620cb81c-4b75-400d-a23f-246ea83eec92",
          "name": "BENZO(H)BENZ(5,6)ACRIDINO(2,1,9,8-KLMNA)ACRIDINE-8,16-DIONE",
          "stdName": "BENZO(H)BENZ(5,6)ACRIDINO(2,1,9,8-KLMNA)ACRIDINE-8,16-DIONE",
          "type": "sys",
          "languages": [
            "en"
          ],
          "preferred": false,
          "references": [
            "6ef869e0-5ca0-43f4-b6e7-4ece291b3db5",
            "128a011f-0f4c-472b-ba62-00aa18eb6385"
          ],
          "display_name": false
        },
        {
          "uuid": "fa000f4c-307c-4813-9dbc-fd876c70ac68",
          "name": "CALEDON PAPER YELLOW GN",
          "stdName": "CALEDON PAPER YELLOW GN",
          "type": "bn",
          "languages": [
            "en"
          ],
          "preferred": false,
          "references": [
            "6ef869e0-5ca0-43f4-b6e7-4ece291b3db5",
            "128a011f-0f4c-472b-ba62-00aa18eb6385"
          ],
          "display_name": false
        },
        {
          "uuid": "508d20d0-83be-4bff-afdb-7bff016dd33a",
          "name": "CI 70600",
          "stdName": "CI 70600",
          "type": "cn",
          "languages": [
            "en"
          ],
          "preferred": false,
          "references": [
            "6ef869e0-5ca0-43f4-b6e7-4ece291b3db5",
            "128a011f-0f4c-472b-ba62-00aa18eb6385"
          ],
          "display_name": false
        },
        {
          "uuid": "4b8a0c76-3954-4f20-93c3-5e7e05cb9764",
          "name": "CI PIGMENT YELLOW 112",
          "stdName": "CI PIGMENT YELLOW 112",
          "type": "cn",
          "languages": [
            "en"
          ],
          "preferred": false,
          "references": [
            "6ef869e0-5ca0-43f4-b6e7-4ece291b3db5",
            "128a011f-0f4c-472b-ba62-00aa18eb6385"
          ],
          "display_name": false
        },
        {
          "uuid": "8ba0f105-c4e6-45c2-8659-f6700dbaceb5",
          "name": "CI PIGMENT YELLOW 24",
          "stdName": "CI PIGMENT YELLOW 24",
          "type": "cn",
          "languages": [
            "en"
          ],
          "preferred": false,
          "references": [
            "6ef869e0-5ca0-43f4-b6e7-4ece291b3db5",
            "128a011f-0f4c-472b-ba62-00aa18eb6385"
          ],
          "display_name": false
        },
        {
          "uuid": "f3f47e38-166f-45a4-8dbb-e718314f0c97",
          "name": "CI VAT YELLOW 1",
          "stdName": "CI VAT YELLOW 1",
          "type": "cn",
          "languages": [
            "en"
          ],
          "preferred": false,
          "references": [
            "6ef869e0-5ca0-43f4-b6e7-4ece291b3db5",
            "128a011f-0f4c-472b-ba62-00aa18eb6385"
          ],
          "display_name": false
        },
        {
          "uuid": "42f651cc-0c72-414f-82f9-b00639bbc5cf",
          "name": "FLAVANTHRENE",
          "stdName": "FLAVANTHRENE",
          "type": "cn",
          "languages": [
            "en"
          ],
          "preferred": false,
          "references": [
            "6ef869e0-5ca0-43f4-b6e7-4ece291b3db5",
            "128a011f-0f4c-472b-ba62-00aa18eb6385"
          ],
          "display_name": false
        },
        {
          "uuid": "f3fb276b-1184-4be0-a5be-d3048e14d522",
          "name": "FLAVANTHRONE",
          "stdName": "FLAVANTHRONE",
          "type": "cn",
          "languages": [
            "en"
          ],
          "preferred": false,
          "references": [
            "02b3086c-a7f2-4e32-8f36-494d26ae3d06",
            "161aaf3a-7eaa-456b-b8a4-d8531fd2160d"
          ],
          "display_name": true
        },
        {
          "uuid": "812db50e-5393-4dc0-a95d-625b5249a431",
          "name": "NSC-16091",
          "stdName": "NSC-16091",
          "type": "cd",
          "languages": [
            "en"
          ],
          "preferred": false,
          "references": [
            "6ef869e0-5ca0-43f4-b6e7-4ece291b3db5",
            "128a011f-0f4c-472b-ba62-00aa18eb6385"
          ],
          "display_name": false
        },
        {
          "uuid": "a6367073-45d3-438e-83b1-2069edcda519",
          "name": "NSC-39910",
          "stdName": "NSC-39910",
          "type": "cd",
          "languages": [
            "en"
          ],
          "preferred": false,
          "references": [
            "6ef869e0-5ca0-43f4-b6e7-4ece291b3db5",
            "128a011f-0f4c-472b-ba62-00aa18eb6385"
          ],
          "display_name": false
        },
        {
          "uuid": "63e16509-db5d-4a6a-9ba4-c2fc7fb0e193",
          "name": "VAT YELLOW 1",
          "stdName": "VAT YELLOW 1",
          "type": "cn",
          "languages": [
            "en"
          ],
          "preferred": false,
          "references": [
            "6ef869e0-5ca0-43f4-b6e7-4ece291b3db5",
            "128a011f-0f4c-472b-ba62-00aa18eb6385"
          ],
          "display_name": false
        }
      ],
      "references": [
        {
          "uuid": "01b20f44-9649-42a9-a7bb-18c6466a0bb8",
          "citation": "SRS CODE IMPORT",
          "doc_type": "SRS",
          "public_domain": true,
          "document_date": 1493391099000,
          "tags": [
            "NOMEN"
          ]
        },
        {
          "uuid": "c5a001b7-6f04-45fe-820b-fc99b451ef6c",
          "citation": "CHEMID  2011",
          "doc_type": "SRS",
          "public_domain": true,
          "tags": [
            "NOMEN"
          ]
        },
        {
          "uuid": "02b3086c-a7f2-4e32-8f36-494d26ae3d06",
          "citation": "CHEMID 2011",
          "doc_type": "SRS",
          "public_domain": true,
          "tags": [
            "NOMEN"
          ]
        },
        {
          "uuid": "6ef869e0-5ca0-43f4-b6e7-4ece291b3db5",
          "citation": "STN",
          "doc_type": "SRS",
          "public_domain": true,
          "tags": [
            "NOMEN"
          ]
        },
        {
          "uuid": "128a011f-0f4c-472b-ba62-00aa18eb6385",
          "citation": "STN (SCIFINDER)",
          "doc_type": "STN (SCIFINDER)",
          "public_domain": true,
          "tags": [
            "NOMEN"
          ]
        },
        {
          "uuid": "f8e3f374-4a61-a28f-770d-308fcacb5202",
          "citation": "WEBSITE",
          "url": "https://comptox.epa.gov/dashboard/dsstoxdb/results?utf8=%E2%9C%93&search=475-71-8",
          "doc_type": "WEBSITE",
          "public_domain": true,
          "tags": [
            "NOMEN",
            "PUBLIC_DOMAIN_RELEASE"
          ]
        },
        {
          "uuid": "66d44581-f197-87e2-2222-f1dd4c5fe371",
          "citation": "WIKI",
          "doc_type": "WIKI",
          "public_domain": true
        },
        {
          "uuid": "0c923922-93d5-bc83-a263-cf8f2bbdcff2",
          "citation": "NCI",
          "doc_type": "NCI DRUG DICTIONARY",
          "public_domain": true
        },
        {
          "uuid": "161aaf3a-7eaa-456b-b8a4-d8531fd2160d",
          "citation": "STN",
          "doc_type": "STN (SCIFINDER)",
          "public_domain": true,
          "tags": [
            "PUBLIC_DOMAIN_RELEASE"
          ]
        }
      ],
      "definition_type": "PRIMARY",
      "moieties": [
        {
          "uuid": "573cdbc6-a1cf-4edc-89cb-3736a2e044b6",
          "id": "573cdbc6-a1cf-4edc-89cb-3736a2e044b6",
          "molfile": "\n  Marvin  01132104322D          \n\n 32 39  0  0  0  0            999 V2000\n    8.6732   -2.6908    0.0000 O   0  0  0  0  0  0  0  0  0  0  0  0\n    7.9597   -3.1042    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0\n    7.2413   -2.6918    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0\n    7.2413   -1.8739    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0\n    6.5338   -1.4615    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0\n    5.8154   -1.8739    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0\n    5.8154   -2.6918    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0\n    6.5338   -3.1042    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0\n    6.5338   -3.9290    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0\n    5.8154   -4.3413    0.0000 N   0  0  0  0  0  0  0  0  0  0  0  0\n    5.8154   -5.1660    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0\n    5.1004   -5.5798    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0\n    5.1004   -6.3987    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0\n    5.8161   -6.8159    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0\n    6.5338   -6.4045    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0\n    7.2488   -6.8165    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0\n    7.9556   -6.4027    0.0000 N   0  0  0  0  0  0  0  0  0  0  0  0\n    7.9556   -5.5780    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0\n    8.6711   -5.1621    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0\n    8.6711   -4.3328    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0\n    7.9597   -3.9290    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0\n    7.2413   -4.3413    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0\n    7.2413   -5.1660    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0\n    6.5338   -5.5784    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0\n    7.2488   -7.6354    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0\n    7.9637   -8.0493    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0\n    7.9637   -8.8740    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0\n    7.2468   -9.2872    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0\n    6.5337   -8.8758    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0\n    6.5337   -8.0534    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0\n    5.8161   -7.6430    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0\n    5.1056   -8.0573    0.0000 O   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 21  2  1  0  0  0  0\n  4  3  1  0  0  0  0\n  3  8  2  0  0  0  0\n  5  4  2  0  0  0  0\n  6  5  1  0  0  0  0\n  7  6  2  0  0  0  0\n  8  7  1  0  0  0  0\n  8  9  1  0  0  0  0\n  9 10  1  0  0  0  0\n 22  9  2  0  0  0  0\n 10 11  2  0  0  0  0\n 12 11  1  0  0  0  0\n 11 24  1  0  0  0  0\n 13 12  2  0  0  0  0\n 14 13  1  0  0  0  0\n 15 14  2  0  0  0  0\n 14 31  1  0  0  0  0\n 16 15  1  0  0  0  0\n 24 15  1  0  0  0  0\n 16 17  2  0  0  0  0\n 25 16  1  0  0  0  0\n 17 18  1  0  0  0  0\n 18 19  2  0  0  0  0\n 23 18  1  0  0  0  0\n 19 20  1  0  0  0  0\n 20 21  2  0  0  0  0\n 21 22  1  0  0  0  0\n 22 23  1  0  0  0  0\n 23 24  2  0  0  0  0\n 25 26  1  0  0  0  0\n 30 25  2  0  0  0  0\n 26 27  2  0  0  0  0\n 27 28  1  0  0  0  0\n 28 29  2  0  0  0  0\n 29 30  1  0  0  0  0\n 31 30  1  0  0  0  0\n 31 32  2  0  0  0  0\nM  END",
          "smiles": "c1ccc2c(c1)c3c4c(ccc5c4c6c(ccc7c6c(c8ccccc8c7=O)n5)n3)c2=O",
          "formula": "C28H12N2O2",
          "atropisomerism": "No",
          "charge": 0,
          "count": 1,
          "stereochemistry": "ACHIRAL",
          "count_amount": {
            "type": "MOL RATIO",
            "average": 1,
            "units": "MOL RATIO",
            "uuid": "e77e5a38-1a39-4e60-9531-b0574f4a9c27"
          },
          "defined_stereo": 0,
          "ez_centers": 0,
          "molecular_weight": "408.4081",
          "optical_activity": "NONE",
          "stereo_centers": 0
        }
      ],
      "definition_level": "COMPLETE",
      "uuid": "ccc51926-3e83-407b-a02c-52286e7a2ea3",
      "version": "8",
      "structure": {
        "id": "c0a6e7d7-5137-4b60-ae0b-b2bd31305ac5",
        "molfile": "\n  Marvin  01132109572D          \n\n 32 39  0  0  0  0            999 V2000\n    8.6732   -2.6908    0.0000 O   0  0  0  0  0  0  0  0  0  0  0  0\n    7.9597   -3.1042    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0\n    7.2413   -2.6918    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0\n    6.5338   -3.1042    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0\n    6.5338   -3.9290    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0\n    5.8154   -4.3413    0.0000 N   0  0  0  0  0  0  0  0  0  0  0  0\n    5.8154   -5.1660    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0\n    6.5338   -5.5784    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0\n    6.5338   -6.4045    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0\n    5.8161   -6.8159    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0\n    5.8161   -7.6430    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0\n    5.1056   -8.0573    0.0000 O   0  0  0  0  0  0  0  0  0  0  0  0\n    6.5337   -8.0534    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0\n    7.2488   -7.6354    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0\n    7.9637   -8.0493    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0\n    7.9637   -8.8740    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0\n    7.2468   -9.2872    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0\n    6.5337   -8.8758    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0\n    7.2488   -6.8165    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0\n    7.9556   -6.4027    0.0000 N   0  0  0  0  0  0  0  0  0  0  0  0\n    7.9556   -5.5780    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0\n    8.6711   -5.1621    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0\n    8.6711   -4.3328    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0\n    7.9597   -3.9290    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0\n    7.2413   -4.3413    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0\n    7.2413   -5.1660    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0\n    5.1004   -6.3987    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0\n    5.1004   -5.5798    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0\n    5.8154   -2.6918    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0\n    5.8154   -1.8739    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0\n    6.5338   -1.4615    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0\n    7.2413   -1.8739    0.0000 C   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  2  0  0  0  0\n  6  7  1  0  0  0  0\n  7  8  2  0  0  0  0\n  8  9  1  0  0  0  0\n  9 10  2  0  0  0  0\n 10 11  1  0  0  0  0\n 11 12  2  0  0  0  0\n 11 13  1  0  0  0  0\n 13 14  1  0  0  0  0\n 14 15  2  0  0  0  0\n 15 16  1  0  0  0  0\n 16 17  2  0  0  0  0\n 17 18  1  0  0  0  0\n 18 13  2  0  0  0  0\n 14 19  1  0  0  0  0\n 19  9  1  0  0  0  0\n 19 20  2  0  0  0  0\n 20 21  1  0  0  0  0\n 21 22  1  0  0  0  0\n 22 23  2  0  0  0  0\n 23 24  1  0  0  0  0\n 24  2  1  0  0  0  0\n 24 25  2  0  0  0  0\n 25  5  1  0  0  0  0\n 25 26  1  0  0  0  0\n 26  8  1  0  0  0  0\n 26 21  2  0  0  0  0\n 10 27  1  0  0  0  0\n 27 28  2  0  0  0  0\n 28  7  1  0  0  0  0\n  4 29  2  0  0  0  0\n 29 30  1  0  0  0  0\n 30 31  2  0  0  0  0\n 31 32  1  0  0  0  0\n 32  3  2  0  0  0  0\nM  END",
        "smiles": "c1ccc2c(c1)c3c4c(ccc5c4c6c(ccc7c6c(c8ccccc8c7=O)n5)n3)c2=O",
        "formula": "C28H12N2O2",
        "atropisomerism": "No",
        "charge": 0,
        "count": 1,
        "stereochemistry": "ACHIRAL",
        "defined_stereo": 0,
        "ez_centers": 0,
        "molecular_weight": "408.4081",
        "optical_activity": "NONE",
        "references": [
          "c5a001b7-6f04-45fe-820b-fc99b451ef6c",
          "161aaf3a-7eaa-456b-b8a4-d8531fd2160d"
        ],
        "stereo_centers": 0
      },
      "unii": "5FA52JAB7C"
    }
  ]
}