Unique Ingredient Identifier (UNII)

{
  "description" : "A UNII is a non-proprietary, free, unique, unambiguous, nonsemantic, alphanumeric identifier based on a substance's molecular structure and/or descriptive information. UNII identifiers are generated based on scientific identity characteristics using ISO 11238 data elements. UNII availability does not imply any regulatory review or approval. Synonyms and mappings are based on the best public information available at the time of publication.",
  "date" : "2022-08-23T00:00:00-00:00",
  "publisher" : "U.S. Food and Drug Administration (FDA)",
  "content" : "not-present",
  "property" : null,
  "name" : "UNII",
  "copyright" : "Unless otherwise noted, the contents of the FDA website (www.fda.gov) — both text and graphics — are not copyrighted. They are in the public domain and may be republished, reprinted and otherwise used freely by anyone without the need to obtain permission from FDA. Credit to the U.S. Food and Drug Administration as the source is appreciated but not required.",
  "experimental" : false,
  "resourceType" : "CodeSystem",
  "title" : "Unique Ingredient Identifier (UNII)",
  "extension" : [ {
    "url" : "http://health-samurai.io/extensions/source",
    "valueCode" : "db"
  } ],
  "status" : "active",
  "id" : "UNII",
  "url" : "http://fdasis.nlm.nih.gov",
  "identifier" : [ {
    "system" : "urn:ietf:rfc:3986",
    "value" : "urn:oid:2.16.840.1.113883.4.9"
  } ],
  "caseSensitive" : true,
  "version" : "1.0.0",
  "contact" : [ {
    "name" : "U.S. Food and Drug Administration (FDA)",
    "telecom" : [ {
      "system" : "url",
      "value" : "https://www.fda.gov/"
    } ]
  } ],
  "text" : {
    "div" : "<div xmlns=\"http://www.w3.org/1999/xhtml\"><p class=\"res-header-id\"><b>Generated Narrative: CodeSystem UNII</b></p><a name=\"UNII\"> </a><a name=\"hcUNII\"> </a><p>This case-sensitive code system <code>http://fdasis.nlm.nih.gov</code> defines codes, but no codes are represented here</p></div>",
    "status" : "generated"
  }
}