Chemical Entities of Biological Interest Ontology	BRENDA Tissue and Enzyme Source Ontology	Source
http://purl.obolibrary.org/obo/CHEBI_78505	http://purl.obolibrary.org/obo/BTO_0001439	LOOM
http://purl.obolibrary.org/obo/CHEBI_74969	http://purl.obolibrary.org/obo/BTO_0004617	LOOM