Heterocyclic Compounds

What’s a heterocyclic compound? If the ring system is made up of carbon atoms and at least one other element, the compound can be classified as hetero cyclic(that is, hetero atoms). As hetero atom can be N, О, S, В, Al, Si, P, Sn, As, , Cu. But The elements that are found most commonly together with carbon in a ring system are Nitrogen (N), Oxygen(O), and Sulfur(S).