{
  "@context": {
    "@version": 1.1,
    "schema": "https://schema.org/",
    "chebi": "https://www.ebi.ac.uk/chebi/searchId.do?chebiId=CHEBI:",
    "cheminf": "http://semanticscience.org/resource/CHEMINF_",
    "sigmal": "https://api.sigmaaldrich.com/vocab/",
    "xsd": "http://www.w3.org/2001/XMLSchema#",

    "Product": "schema:Product",
    "ChemicalSubstance": "schema:ChemicalSubstance",
    "SafetyDataSheet": "sigmal:SafetyDataSheet",

    "id": "@id",
    "catalogNumber": "schema:productID",
    "name": "schema:name",
    "description": "schema:description",
    "brand": "schema:brand",
    "casNumber": {
      "@id": "sigmal:casNumber",
      "@type": "xsd:string"
    },
    "formula": {
      "@id": "sigmal:molecularFormula",
      "@type": "xsd:string"
    },
    "molecularWeight": {
      "@id": "sigmal:molecularWeight",
      "@type": "xsd:decimal"
    },
    "smiles": {
      "@id": "cheminf:000018",
      "@type": "xsd:string"
    },
    "inchi": {
      "@id": "cheminf:000113",
      "@type": "xsd:string"
    },
    "inchiKey": {
      "@id": "cheminf:000059",
      "@type": "xsd:string"
    },
    "purity": "sigmal:purity",
    "grade": "sigmal:grade",
    "physicalState": "sigmal:physicalState",
    "synonyms": "schema:alternateName",
    "price": "schema:price",
    "currency": "schema:priceCurrency",
    "stockLevel": "schema:availability",
    "revisionDate": {
      "@id": "schema:dateModified",
      "@type": "xsd:date"
    },
    "pdfUrl": {
      "@id": "schema:url",
      "@type": "@id"
    }
  }
}