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The title compound, C10H11N3O2, was synthesized by the reaction of 1H-benzotriazole with ethyl 2-chloroacetate in ethanol. The non-H atoms, excluding the benzotriazol-1-yl group, are almost coplanar (r.m.s. deviation of the non-H atoms = 0.0409 Å). The dihedral angle formed between this plane and the benzotriazole ring is 79.12 (5)° In the crystal, weak intermolecular C—H...N and C—H...O interactions help to consolidate the three-dimensional network.