Chemical abstract codes

{
  "description" : "Chemical abstract codes",
  "date" : "2021-11-09T10:00:00+10:00",
  "publisher" : "TBD - External Body",
  "content" : "not-present",
  "property" : null,
  "name" : "CAS",
  "experimental" : false,
  "resourceType" : "CodeSystem",
  "title" : "Chemical abstract codes",
  "extension" : [ {
    "url" : "http://health-samurai.io/extensions/source",
    "valueCode" : "db"
  } ],
  "status" : "retired",
  "id" : "add29b82-5762-4d66-9af9-c35f3409c185",
  "url" : "http://terminology.hl7.org/CodeSystem/CAS",
  "identifier" : [ {
    "system" : "urn:ietf:rfc:3986",
    "value" : "urn:oid:2.16.840.1.113883.6.61"
  } ],
  "caseSensitive" : true,
  "version" : "2.0.1",
  "text" : {
    "div" : "<div xmlns=\"http://www.w3.org/1999/xhtml\"><p class=\"res-header-id\"><b>Generated Narrative: CodeSystem CAS</b></p><a name=\"CAS\"> </a><a name=\"hcCAS\"> </a><a name=\"CAS-en-US\"> </a><p>This case-sensitive code system <code>http://terminology.hl7.org/CodeSystem/CAS</code> defines codes, but no codes are represented here</p></div>",
    "status" : "generated"
  }
}