In general, if the atoms that make up the ring contain heteroatoms, such rings become heterocycles, and organic compounds containing heterocycles are called heterocyclic compounds. An article called Synthesis of new proton-pump inhibitors, published in 1996-06-30, which mentions a compound: 84547-64-8, Name is 3-(Chloromethyl)-1-methyl-1H-pyrazole, Molecular C5H7ClN2, Formula: C5H7ClN2.
For development new anti-ulcer agents, we synthesized omeprazole analogs, in which pyridine group was replaced by pyrazole moiety, to increase pharmacol. activity and to decrease side effects, and also synthesize substituted benzimidazole rings.
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Reference:
Amide – Wikipedia,
Amide – an overview | ScienceDirect Topics