{

"resourceType": "Substance",
"id": "f204",
"identifier": [
  {
    "system": "http://acme.org/identifiers/substances",
    "value": "15970"
  }
],
"category": [
  {
    "coding": [
      {
        "system": "http://terminology.hl7.org/CodeSystem/substance-category",
        "code": "chemical",
        "display": "Chemical"
      }
    ]
  }
],
"code": {
  "coding": [
    {
      "system": "http://snomed.info/sct",
      "code": "333346007",
      "display": "Silver nitrate 20% solution (product)"
    }
  ]
},
"description": "Solution for silver nitrate stain",
"instance": [
  {
    "identifier": {
      "system": "http://acme.org/identifiers/substances/lot",
      "value": "AB94687"
    },
    "expiry": "2018-01-01",
    "quantity": {
      "value": 100,
      "unit": "mL",
      "system": "http://unitsofmeasure.org",
      "code": "mL"
    }
  }
],
"meta": {
  "tag": [
    {
      "system": "http://terminology.hl7.org/CodeSystem/v3-ActReason",
      "code": "HTEST",
      "display": "test health data"
    }
  ]
}

}