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Key indicators: single-crystal X-ray study; T = 296 K; mean (C-C) = 0.004 Å; R factor = 0.053; wR factor = 0.129; data-to-parameter ratio = 15.0.In the title compound, C 16 H 18 ClN 3 O, the cyclohexane ring adopts a distorted chair conformation. In the crystal, pairs of molecules are linked by N-HÁ Á ÁO hydrogen bonds into inversion dimers, forming R 2 2 (10) ring motifs. These dimers are connected through C-HÁ Á ÁN hydrogen bonds into chains along the a axis, forming layers parallel to (101). Related literature ExperimentalCrystal data