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In the title compound, C11H9Cl2N3O3, the triazole and benzene rings are roughly parallel to one another [dihedral angle = 4.99 (2)°] because the C—O—C—C—O chain that links the two rings is folded [O—C—C—O = 8.60 (2)°] rather than fully extended. In the crystal, weak intermolecular C—H...N and C—H...O interactions are present, and π–π interactions are indicated by the short distances [3.749 (3) Å] between the centroids of the triazole and benzene rings.