Enzyme Reaction Ontology for annotating Partial Information of chemical transformation	Cigarette Smoke Exposure Ontology	Source
http://scai.fraunhofer.de/CSEO#CSEO_00001824	http://reactionontology.org/piero/transformation	LOOM
http://mged.sourceforge.net/ontologies/MGEDOntology.owl#Compound	http://www.kegg.jp/entry/compound	LOOM
http://scai.fraunhofer.de/CSEO#CSEO_00000824	http://reactionontology.org/piero/molecule	LOOM
http://www.ifomis.org/snap#Object	http://reactionontology.org/piero/object	LOOM
http://scai.fraunhofer.de/CSEO#CSEO_00000836	http://www.kegg.jp/entry/enzyme	LOOM
http://www.ifomis.org/span#Process	http://reactionontology.org/piero/process	LOOM