[general term for any of the nitrogenous rings found on nucleosides, nucleotides, and nucleic acids. ( CSP )]
UMLS (CSP) C0597101 - Nucleic Acid, Nucleoside, or Nucleotide
Relation/PAR: nitrogenous heterocyclic compound
Relation/CHD: 1H-Purin-6-amine
4-Amino-2(1H)-pyrimidinone
2-Amino-1,7-dihydro-6H-purin-6-one
2,4-dihydroxy-5-methylpyrimidine
2, 4-Dioxopyrimidine