A heterocyclic compound containing an oxygen atom and a nitrogen atom in the fused ring structure.
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5-(2,4-DICHLOROPHENYL)-1H-PYRAZOLE-4-CARBALDEHYDE
2-(3-fluoro-6-nitrophenyl)benzothiazole
1-chloro-2-(2-chloro-ethoxy)-4-isothiocyanato-benzene
