ammonium polyatomic cation ammonium ion derivative azanium ion derivatives CHEBI:35274 ammonium ion derivatives A derivative of ammonium, NH4(+), in which one (or more) of the hydrogens bonded to the nitrogen have been replaced with univalent organyl groups. The substituting carbon of the organyl group must not itself be directly attached to a heteroatom (thereby excluding protonated amides, hemiaminals, etc). azanium ion derivative chebi_ontology nitrogen molecular entity