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 Direct Arylation of Azoles Enabled by Pd/Cu Dual Catalysis, published in 2021-03-19, which mentions a compound: 118994-89-1, Name is Ethyl oxazole-5-carboxylate, Molecular C6H7NO3, COA of Formula: C6H7NO3.
A practical approach toward the synthesis of 2-arylazoles via direct arylation was described. The transformation relied on a Pd/Cu cocatalyst system that operated with low catalyst loadings. The reaction conditions were found to be tolerant of a wide range of functional groups and nitrogen-containing heterocycles commonly employed in a drug discovery setting.
Although many compounds look similar to this compound(118994-89-1)COA of Formula: C6H7NO3, numerous studies have shown that this compound(SMILES:O=C(C1=CN=CO1)OCC), has unique advantages. If you want to know more about similar compounds, you can read my other articles.