<http://linkedlifedata.com/resource/pubmed/chemical/Tryptophan> <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://linkedlifedata.com/resource/pubmed/Chemical> .
<http://linkedlifedata.com/resource/pubmed/chemical/Tryptophan> <http://www.w3.org/2000/01/rdf-schema#label> "Tryptophan" .
<http://linkedlifedata.com/resource/pubmed/chemical/Tryptophan> <http://linkedlifedata.com/resource/pubmed/registryNumber> "73-22-3" .