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In the title compound, C 27 H 22 N 2 O 4 , the dihedral angles between the central benzene ring and the cyano­benzene ring and the 2 H -coumarin ring system (r.m.s. deviation = 0.014 Å) are 22.95 (11) and 75.59 (8)°, respectively. Both terminal C atoms of the pendant diethyl­amino group lie to the same side of the coumarin ring system [deviations = 1.366 (2) and 1.266 (2) Å]. In the crystal, mol­ecules are linked by C—H⋯O and C—H⋯N hydrogen bonds and a C—H⋯π inter­action, generating a three-dimensional network.

4′-Cyanobiphenyl-4-yl 7-diethylamino-2-oxo-2H-chromene-3-carboxylate