Chemical Entities of Biological Interest Ontology	Enzyme Reaction Ontology for annotating Partial Information of chemical transformation	Source
http://purl.obolibrary.org/obo/CHEBI_33250	http://reactionontology.org/piero/kcfs#atom	LOOM
http://purl.obolibrary.org/obo/CHEBI_25367	http://reactionontology.org/piero/molecule	LOOM