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Key indicators: single-crystal X-ray study; T = 273 K; mean (C-C) = 0.004 Å; R factor = 0.054; wR factor = 0.117; data-to-parameter ratio = 9.0. The dihedral angle between the naphthalene and benzene planes in the title compound, C 18 H 14 N 2 O 3 , is 4.3 (2) . The molecular conformation is characterized by an N-HÁ Á ÁO hydrogen bond and the crystal packing is stabilized by N-HÁ Á ÁO and O-HÁ Á ÁO hydrogen bonds. Related literature For related literature, see: Alexiou et al. (2002); Gaynor etdoi:10.1107/s1600536807045497 fatcat:t7bt6upgdzdvdiq3nmjed2xkm4