The heterocyclic compound or ring structure may be a cyclic compound that has atoms of a minimum of two completely different components as members of its ring. Heterocyclic chemistry is the subdivision of chemistry addressing the synthesis, properties, and applications of those heterocyclic. In distinction, the rings of isocyclic compounds consist entirely of atoms of a constant part. Even though heterocyclic compounds could also be inorganic, maximum contain a minimum of one carbon. Whereas atoms that square measure neither carbon nor hydrogen is normally referred to in organic chemistry as heteroatoms, this can be typically compared to the all-carbon backbone. But this doesn't stop a compound like a borazine (which has no carbon atoms) from being tagged "heterocyclic". IUPAC recommends the Hantzsch-Widman language for naming heterocyclic compounds.