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 NMR study of isomeric benzoxazoles, published in 1972, which mentions a compound: 271-95-4, Name is 1,2-Benzisoxazole, Molecular C7H5NO, Recommanded Product: 271-95-4.
NMR spectra of anthranil (I, R = H), 3-methylanthranil (I, R = Me), benzisoxazole (II, R = H), and 3-methylbenzisoxazole (II, R = Me) were compared with computer-simulated spectra. Long-range coupling (including 5J) constants were determined and discussed.
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Reference:
Highly efficient and robust molecular ruthenium catalysts for water oxidation,
Catalysts | Special Issue : Ruthenium Catalysts – MDPI