RxNORM	Physico-Chemical Methods and Properties	Source
http://purl.bioontology.org/ontology/STY/T086	http://purl.obolibrary.org/obo/FIX_0000312	LOOM
http://purl.bioontology.org/ontology/STY/T087	http://purl.obolibrary.org/obo/FIX_0000293	LOOM