Functional Therapeutic Chemical Classification System	Sequence Types and Features Ontology	Source
http://purl.obolibrary.org/obo/SO_0000253	http://purl.uniprot.org/uniprot/O14717	LOOM
http://purl.obolibrary.org/obo/SO_0001443	http://www.drugbank.ca/drugs/DB00145	LOOM
http://purl.obolibrary.org/obo/SO_0001700	http://purl.obolibrary.org/obo/GO_0016570	LOOM