The Drug Ontology	Veterans Health Administration National Drug File	Source
http://purl.bioontology.org/ontology/VANDF/4018838	http://purl.obolibrary.org/obo/CHEBI_15443	LOOM
http://purl.bioontology.org/ontology/VANDF/4020941	http://purl.obolibrary.org/obo/CHEBI_8863	LOOM
http://purl.bioontology.org/ontology/VANDF/4019115	http://purl.obolibrary.org/obo/CHEBI_32026	LOOM
http://purl.bioontology.org/ontology/VANDF/4018868	http://purl.obolibrary.org/obo/CHEBI_15409	LOOM
http://purl.bioontology.org/ontology/VANDF/4018868	http://purl.obolibrary.org/obo/DRON_00018290	LOOM
http://purl.bioontology.org/ontology/VANDF/4020765	http://purl.obolibrary.org/obo/CHEBI_36080	LOOM
http://purl.bioontology.org/ontology/VANDF/4017667	http://purl.obolibrary.org/obo/CHEBI_28940	LOOM