{
  "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": "2026-09-09",
    "results": {
      "skip": 0,
      "limit": 1,
      "total": 1
    }
  },
  "results": [
    {
      "codes": [
        {
          "uuid": "34c3fc1f-45bb-4833-aea4-22c9cb5d4ae4",
          "code": "1218-34-4",
          "type": "PRIMARY",
          "url": "https://commonchemistry.cas.org/detail?cas_rn=1218-34-4",
          "code_system": "CAS",
          "references": [
            "c2f71bf1-80dc-4408-8986-281c670581e4",
            "4d4ceabe-709b-4d20-8d95-b5ddbf728f95"
          ]
        },
        {
          "uuid": "50f2648d-7fdd-426a-a921-aaae22844a44",
          "code": "214-935-9",
          "type": "PRIMARY",
          "url": "https://echa.europa.eu/substance-information/-/substanceinfo/100.013.578",
          "code_system": "ECHA (EC/EINECS)",
          "references": [
            "c2f71bf1-80dc-4408-8986-281c670581e4"
          ]
        },
        {
          "uuid": "59012a4f-419f-4c08-b48c-65d98544d11d",
          "code": "SUB28834",
          "type": "PRIMARY",
          "code_system": "EVMPD",
          "references": [
            "c2f71bf1-80dc-4408-8986-281c670581e4"
          ]
        },
        {
          "uuid": "489f4743-ca60-4c89-978a-13d1cbb876a0",
          "code": "700653",
          "type": "PRIMARY",
          "url": "https://pubchem.ncbi.nlm.nih.gov/compound/700653",
          "code_system": "PUBCHEM",
          "references": [
            "c2f71bf1-80dc-4408-8986-281c670581e4"
          ]
        },
        {
          "uuid": "b34e5d00-75fa-4a78-86db-c35827474820",
          "code": "1366817",
          "type": "PRIMARY",
          "url": "https://rxnav.nlm.nih.gov/REST/rxcui/1366817/allProperties.xml?prop=all",
          "code_system": "RXCUI",
          "references": [
            "5a8666ea-b569-2c82-5d8e-4f25f91fe5bd"
          ]
        },
        {
          "uuid": "863c6034-bb96-4bb7-a05c-a423dd283b34",
          "code": "U9264T8OAE",
          "type": "PRIMARY",
          "code_system": "FDA UNII"
        },
        {
          "uuid": "d2c35dc2-11b6-6189-abdb-abf8f2d6a39d",
          "code": "143877",
          "type": "PRIMARY",
          "url": "https://www.ebi.ac.uk/chebi/chebiOntology.do?chebiId=CHEBI:143877",
          "code_system": "CHEBI",
          "references": [
            "d90267e6-b060-f669-c93e-17f09dac9451"
          ]
        },
        {
          "uuid": "f8b897cd-ea61-7f69-c36a-375b7acdb890",
          "code": "133746",
          "type": "PRIMARY",
          "url": "https://www.ebi.ac.uk/chebi/chebiOntology.do?chebiId=CHEBI:133746",
          "code_system": "CHEBI",
          "references": [
            "d90267e6-b060-f669-c93e-17f09dac9451"
          ]
        },
        {
          "uuid": "4a2f407a-ea4e-ff1f-3e92-72ffa94af89b",
          "code": "74640",
          "type": "PRIMARY",
          "url": "https://www.ebi.ac.uk/chebi/chebiOntology.do?chebiId=CHEBI:74640",
          "code_system": "CHEBI",
          "references": [
            "d90267e6-b060-f669-c93e-17f09dac9451"
          ]
        },
        {
          "uuid": "6a61bb32-1089-6dc7-757b-e9447a005d85",
          "code": "1700523",
          "type": "PRIMARY",
          "url": "https://store.usp.org/product/1700523",
          "code_system": "RS_ITEM_NUM",
          "references": [
            "d90267e6-b060-f669-c93e-17f09dac9451"
          ]
        },
        {
          "uuid": "050afeb5-a793-42e5-8990-7853e51d0925",
          "code": "90726",
          "type": "PRIMARY",
          "url": "https://dtp.cancer.gov/dtpstandard/servlet/dwindex?searchtype=NSC&outputformat=html&searchlist=90726",
          "code_system": "NSC",
          "references": [
            "32f00596-83bc-e865-06ee-19c357b4c559"
          ]
        },
        {
          "uuid": "78aa0f72-8479-2fd8-2025-8b24ea7cde72",
          "code": "100000092546",
          "type": "PRIMARY",
          "code_system": "SMS_ID",
          "references": [
            "93f3f2b1-a4c8-efb7-d421-ca8f03d512cb"
          ]
        },
        {
          "uuid": "55e996c2-5b0e-5898-6faf-544c6b4047d6",
          "code": "DTXSID10883669",
          "type": "PRIMARY",
          "url": "https://comptox.epa.gov/dashboard/chemical/details/DTXSID10883669",
          "code_system": "EPA CompTox",
          "references": [
            "d90267e6-b060-f669-c93e-17f09dac9451"
          ]
        }
      ],
      "relationships": [
        {
          "uuid": "ac037929-5ed1-4d28-9c29-4ec0da9faaf5",
          "type": "SALT/SOLVATE->PARENT",
          "related_substance": {
            "uuid": "7e5f5788-674d-45c0-b3d4-af0accf444ea",
            "refuuid": "00524db9-f692-4d0a-9006-caa37c6ebbc6",
            "name": "N-ACETYL-L-TRYPTOPHAN SODIUM",
            "unii": "6G3HTB429P",
            "linking_id": "6G3HTB429P",
            "ref_pname": "N-ACETYL-L-TRYPTOPHAN SODIUM",
            "substance_class": "reference"
          }
        }
      ],
      "substance_class": "chemical",
      "names": [
        {
          "uuid": "b98648eb-fc63-4a9e-b93f-038ee457e870",
          "name": "(S)-N-ACETYLTRYPTOPHAN",
          "stdName": "(S)-N-ACETYLTRYPTOPHAN",
          "type": "sys",
          "languages": [
            "en"
          ],
          "preferred": false,
          "references": [
            "8ed227e0-5422-462e-a035-68c10e370b9c",
            "fd00577c-0dbf-419a-bcec-fefc67f707b3"
          ],
          "display_name": false
        },
        {
          "uuid": "e983bf35-48cb-4d62-adf1-bfd86d33cadb",
          "name": "ACETYL-L-TRYPTOPHAN",
          "stdName": "ACETYL-L-TRYPTOPHAN",
          "type": "sys",
          "languages": [
            "en"
          ],
          "preferred": false,
          "references": [
            "8ed227e0-5422-462e-a035-68c10e370b9c",
            "fd00577c-0dbf-419a-bcec-fefc67f707b3"
          ],
          "display_name": false
        },
        {
          "uuid": "ea480d38-a70d-4f12-a3a2-178ddece59d1",
          "name": "ACETYLTRYPTOPHAN, L-",
          "stdName": "ACETYLTRYPTOPHAN, L-",
          "type": "cn",
          "languages": [
            "en"
          ],
          "preferred": false,
          "references": [
            "0fa56444-e01a-46f5-a241-fa3fc2f5307c",
            "fd00577c-0dbf-419a-bcec-fefc67f707b3"
          ],
          "display_name": false
        },
        {
          "uuid": "f7784393-75fa-86ab-5c9e-83e1b47cd936",
          "name": "ACETYLTRYPTOPHANATE",
          "stdName": "ACETYLTRYPTOPHANATE",
          "type": "cn",
          "languages": [
            "en"
          ],
          "preferred": false,
          "references": [
            "5a8666ea-b569-2c82-5d8e-4f25f91fe5bd"
          ],
          "display_name": false
        },
        {
          "uuid": "a1a3e28f-74cd-4554-9b47-9dc9c4f74075",
          "name": "L-ACETYLTRYPTOPHAN",
          "stdName": "L-ACETYLTRYPTOPHAN",
          "type": "cn",
          "languages": [
            "en"
          ],
          "preferred": false,
          "references": [
            "0fa56444-e01a-46f5-a241-fa3fc2f5307c",
            "fd00577c-0dbf-419a-bcec-fefc67f707b3"
          ],
          "display_name": false
        },
        {
          "uuid": "419545cd-a688-4c77-967b-0c8c9d963f77",
          "name": "L-TRYPTOPHAN, N-ACETYL-",
          "stdName": "L-TRYPTOPHAN, N-ACETYL-",
          "type": "sys",
          "languages": [
            "en"
          ],
          "preferred": false,
          "references": [
            "8ed227e0-5422-462e-a035-68c10e370b9c",
            "fd00577c-0dbf-419a-bcec-fefc67f707b3"
          ],
          "display_name": false
        },
        {
          "uuid": "d8577f47-31da-4c18-8e55-d23db76eb70a",
          "name": "N-ACETYL-L-TRYPTOPHAN",
          "stdName": "N-ACETYL-L-TRYPTOPHAN",
          "type": "sys",
          "languages": [
            "en"
          ],
          "preferred": false,
          "references": [
            "8ed227e0-5422-462e-a035-68c10e370b9c",
            "fd00577c-0dbf-419a-bcec-fefc67f707b3"
          ],
          "display_name": true
        },
        {
          "uuid": "11aaee15-1928-4e8c-9020-9ffe9efc4e4d",
          "name": "N-ACETYL-L-TRYPTOPHANATE",
          "stdName": "N-ACETYL-L-TRYPTOPHANATE",
          "type": "sys",
          "languages": [
            "en"
          ],
          "preferred": false,
          "references": [
            "88c48c05-2697-4ecd-8622-846d340ae7cf",
            "fd00577c-0dbf-419a-bcec-fefc67f707b3"
          ],
          "display_name": false
        },
        {
          "uuid": "a006f956-82fb-4d6b-8c76-7268a5bc1d58",
          "name": "NSC-90726",
          "stdName": "NSC-90726",
          "type": "cd",
          "languages": [
            "en"
          ],
          "preferred": false,
          "references": [
            "8ed227e0-5422-462e-a035-68c10e370b9c",
            "fd00577c-0dbf-419a-bcec-fefc67f707b3"
          ],
          "display_name": false
        },
        {
          "uuid": "e23903c4-15e2-4597-9a89-f56f2d9c8427",
          "name": "TRYPTOPHAN RELATED COMPOUND B",
          "stdName": "TRYPTOPHAN RELATED COMPOUND B",
          "type": "cn",
          "languages": [
            "en"
          ],
          "preferred": false,
          "references": [
            "fd00577c-0dbf-419a-bcec-fefc67f707b3",
            "00885ba3-4010-49e4-8d0e-564658b356a5",
            "dbedee36-b5e2-4ce7-92e1-1fa5ed781cc5"
          ],
          "display_name": false
        },
        {
          "uuid": "4bb1c724-f770-46f8-8991-e3de24faf1d9",
          "name": "TRYPTOPHAN RELATED COMPOUND B [USP-RS]",
          "stdName": "TRYPTOPHAN RELATED COMPOUND B [USP-RS]",
          "type": "cn",
          "languages": [
            "en"
          ],
          "preferred": false,
          "references": [
            "fd00577c-0dbf-419a-bcec-fefc67f707b3",
            "dbedee36-b5e2-4ce7-92e1-1fa5ed781cc5"
          ],
          "display_name": false
        },
        {
          "uuid": "e349439d-6712-4b56-87b0-3a8d82742ca4",
          "name": "TRYPTOPHAN, N-ACETYL-, L-",
          "stdName": "TRYPTOPHAN, N-ACETYL-, L-",
          "type": "sys",
          "languages": [
            "en"
          ],
          "preferred": false,
          "references": [
            "8ed227e0-5422-462e-a035-68c10e370b9c",
            "fd00577c-0dbf-419a-bcec-fefc67f707b3"
          ],
          "display_name": false
        }
      ],
      "references": [
        {
          "uuid": "0fa56444-e01a-46f5-a241-fa3fc2f5307c",
          "citation": "FDA_SRS",
          "doc_type": "SRS",
          "public_domain": true,
          "tags": [
            "NOMEN",
            "PUBLIC_DOMAIN_RELEASE",
            "AUTO_SELECTED"
          ]
        },
        {
          "uuid": "fd00577c-0dbf-419a-bcec-fefc67f707b3",
          "citation": "STN (SCIFINDER)",
          "doc_type": "STN (SCIFINDER)",
          "public_domain": true,
          "tags": [
            "NOMEN"
          ]
        },
        {
          "uuid": "8ed227e0-5422-462e-a035-68c10e370b9c",
          "citation": "STN",
          "doc_type": "SRS",
          "public_domain": true,
          "tags": [
            "NOMEN"
          ]
        },
        {
          "uuid": "88c48c05-2697-4ecd-8622-846d340ae7cf",
          "citation": "evmpd",
          "doc_type": "SRS",
          "public_domain": true,
          "tags": [
            "NOMEN"
          ]
        },
        {
          "uuid": "dbedee36-b5e2-4ce7-92e1-1fa5ed781cc5",
          "citation": "USP-RS",
          "doc_type": "SRS",
          "public_domain": true,
          "tags": [
            "NOMEN"
          ]
        },
        {
          "uuid": "c2f71bf1-80dc-4408-8986-281c670581e4",
          "citation": "SRS CODE IMPORT",
          "doc_type": "SRS",
          "public_domain": true,
          "document_date": 1493390923000,
          "tags": [
            "NOMEN"
          ]
        },
        {
          "uuid": "13caf25b-4ce5-4e0e-8d51-57387507fdea",
          "citation": "SRS import [U9264T8OAE]",
          "url": "http://fdasis.nlm.nih.gov/srs/srsdirect.jsp?regno=U9264T8OAE",
          "doc_type": "SRS",
          "public_domain": true,
          "document_date": 1493390923000,
          "tags": [
            "NOMEN"
          ]
        },
        {
          "uuid": "00885ba3-4010-49e4-8d0e-564658b356a5",
          "citation": "TRYPTOPHAN RELATED COMPOUND B [USP-RS]",
          "doc_type": "SRS_LOCATOR",
          "public_domain": true
        },
        {
          "uuid": "5a8666ea-b569-2c82-5d8e-4f25f91fe5bd",
          "citation": "RXNORM",
          "doc_type": "NLM",
          "public_domain": true,
          "tags": [
            "NOMEN",
            "PUBLIC_DOMAIN_RELEASE"
          ]
        },
        {
          "uuid": "4d4ceabe-709b-4d20-8d95-b5ddbf728f95",
          "citation": "STN",
          "doc_type": "STN (SCIFINDER)",
          "public_domain": true
        },
        {
          "uuid": "d90267e6-b060-f669-c93e-17f09dac9451",
          "doc_type": "SYSTEM",
          "public_domain": true
        },
        {
          "uuid": "32f00596-83bc-e865-06ee-19c357b4c559",
          "citation": "NCI",
          "doc_type": "NCI DRUG DICTIONARY",
          "public_domain": true
        },
        {
          "uuid": "93f3f2b1-a4c8-efb7-d421-ca8f03d512cb",
          "citation": "EU-SRS",
          "doc_type": "EMA LIST",
          "public_domain": true
        }
      ],
      "definition_type": "PRIMARY",
      "moieties": [
        {
          "uuid": "c1e449e0-d48b-4ea4-818a-20472c0678f2",
          "id": "c1e449e0-d48b-4ea4-818a-20472c0678f2",
          "molfile": "\n  Marvin  01132110012D          \n\n 18 19  0  0  1  0            999 V2000\n    4.3044   -1.2616    0.0000 C   0  0  2  0  0  0  0  0  0  2  0  0\n    3.5071   -1.6451    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0\n    3.4996   -2.3667    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0\n    4.0143   -3.0177    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0\n    3.4996   -3.7191    0.0000 N   0  0  0  0  0  0  0  0  0  0  0  0\n    2.7149   -3.4617    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0\n    2.0034   -3.8704    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0\n    1.2767   -3.4617    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0\n    1.2767   -2.6215    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0\n    2.0034   -2.2153    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0\n    2.7149   -2.6215    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0\n    5.0160   -1.7056    0.0000 N   0  0  0  0  0  0  0  0  0  0  0  0\n    5.7022   -1.2616    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0\n    6.3683   -1.7460    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0\n    5.7022   -0.5475    0.0000 O   0  0  0  0  0  0  0  0  0  0  0  0\n    4.3044   -0.5475    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0\n    4.9251   -0.2069    0.0000 O   0  0  0  0  0  0  0  0  0  0  0  0\n    3.7115   -0.1035    0.0000 O   0  0  0  0  0  0  0  0  0  0  0  0\n  1  2  1  0  0  0  0\n  1 12  1  1  0  0  0\n  1 16  1  0  0  0  0\n  2  3  1  0  0  0  0\n  4  3  2  0  0  0  0\n 11  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  1  0  0  0  0\n  6 11  2  0  0  0  0\n  8  7  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 13 12  1  0  0  0  0\n 14 13  1  0  0  0  0\n 15 13  2  0  0  0  0\n 17 16  1  0  0  0  0\n 18 16  2  0  0  0  0\nM  END",
          "smiles": "CC(=O)N[C@@H](Cc1c[nH]c2ccccc12)C(=O)O",
          "formula": "C13H14N2O3",
          "atropisomerism": "No",
          "charge": 0,
          "count": 1,
          "stereochemistry": "ABSOLUTE",
          "count_amount": {
            "type": "MOL RATIO",
            "average": 1,
            "units": "MOL RATIO",
            "uuid": "8dd272ef-4a58-4c43-96c6-ae4c107df862"
          },
          "defined_stereo": 1,
          "ez_centers": 0,
          "molecular_weight": "246.2624",
          "optical_activity": "UNSPECIFIED",
          "stereo_centers": 1
        }
      ],
      "definition_level": "COMPLETE",
      "uuid": "95e2ec4e-2b7d-414a-afae-07f464da0a10",
      "version": "15",
      "structure": {
        "id": "76abcefc-4515-447a-8256-37fba047b89f",
        "molfile": "\n  Marvin  01132106102D          \n\n 18 19  0  0  1  0            999 V2000\n    3.4996   -2.3667    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0\n    3.4996   -3.7191    0.0000 N   0  0  0  0  0  0  0  0  0  0  0  0\n    4.0143   -3.0177    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0\n    4.3044   -1.2616    0.0000 C   0  0  2  0  0  0  0  0  0  0  0  0\n    2.7149   -2.6215    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0\n    4.3044   -0.5475    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0\n    3.5071   -1.6451    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0\n    5.0160   -1.7056    0.0000 N   0  0  0  0  0  0  0  0  0  0  0  0\n    2.7149   -3.4617    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0\n    5.7022   -1.2616    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0\n    4.9251   -0.2069    0.0000 O   0  0  0  0  0  0  0  0  0  0  0  0\n    5.7022   -0.5475    0.0000 O   0  0  0  0  0  0  0  0  0  0  0  0\n    3.7115   -0.1035    0.0000 O   0  0  0  0  0  0  0  0  0  0  0  0\n    2.0034   -2.2153    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0\n    6.3683   -1.7460    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0\n    2.0034   -3.8704    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0\n    1.2767   -2.6215    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0\n    1.2767   -3.4617    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0\n  2  3  1  0  0  0  0\n  3  1  2  0  0  0  0\n  4  7  1  0  0  0  0\n  5  1  1  0  0  0  0\n  4  6  1  1  0  0  0\n  7  1  1  0  0  0  0\n  8  4  1  0  0  0  0\n  9  5  2  0  0  0  0\n 10  8  1  0  0  0  0\n 11  6  2  0  0  0  0\n 12 10  2  0  0  0  0\n 13  6  1  0  0  0  0\n 14  5  1  0  0  0  0\n 15 10  1  0  0  0  0\n 16  9  1  0  0  0  0\n 17 14  2  0  0  0  0\n 18 17  1  0  0  0  0\n  9  2  1  0  0  0  0\n 18 16  2  0  0  0  0\nM  END",
        "smiles": "CC(=O)N[C@@H](Cc1c[nH]c2ccccc12)C(=O)O",
        "formula": "C13H14N2O3",
        "atropisomerism": "No",
        "charge": 0,
        "count": 1,
        "stereochemistry": "ABSOLUTE",
        "defined_stereo": 1,
        "ez_centers": 0,
        "molecular_weight": "246.2624",
        "optical_activity": "UNSPECIFIED",
        "references": [
          "8ed227e0-5422-462e-a035-68c10e370b9c",
          "13caf25b-4ce5-4e0e-8d51-57387507fdea"
        ],
        "stereo_centers": 1
      },
      "unii": "U9264T8OAE"
    }
  ]
}