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In the title compound, C25H15ClN2O2, the pyridine ring is inclined at angles of 6.89 (7), 4.24 (9) and 66.98 (4)° with respect to the naphthalene, chlorophenyl and nitrophenyl rings, respectively. The two substituent aromatic rings make a dihedral angle of 71.1 (1)° with one another. C—H...π and π–π stacking are present in the crystal structure; the π–π stacking [centroid–centroid distance between the pyridyl rings of adjacent molecules= 3.7838 (11) Å] links the molecules into dimers, while the C—H...Cg type π–ring interactons link the molecules into a chain structure along c.