Ammonium ion
http://purl.bioontology.org/ontology/LNC/LP28994-9
http://purl.bioontology.org/ontology/LNC/1845-7
http://purl.bioontology.org/ontology/LNC/1844-0
C0002611
LP28994-9
T197
http://purl.bioontology.org/ontology/LNC/LP14071-2