http://purl.obolibrary.org/obo/IAO_0000116 We are assuming that every molecular entity has @en
rdfs:label molecular entity
http://purl.obolibrary.org/obo/IAO_0000115 , complex, conformer etc., identifiable as a separately distinguishable entity.
http://purl.obolibrary.org/obo/IAO_0000111 molecular entity