(Z)-1-Acetyl-3-[2-oxo-1-phenyl-2-(3-pyrid­yl)ethyl­idene]indolin-2-one

The title compound, C(23)H(16)N(2)O(3), exists in a Z configuration with respect to the acyclic C=C bond. The pyridine and phenyl rings are oriented at dihedral angles of 72.97 (4) and 45.05 (4)°, respectively, with respect to the almost planar indoline ring system [maximum deviation 0.080 (1) Å]. The pyridine and phenyl rings are oriented almost perpendicular to each other [dihedral angle 88.93 (5)°]. In the crystal, mol­ecules are inter­connected into a three-dimensional framework via inter­molecular C—H⋯O and C—H⋯N hydrogen bonds and weak π–π inter­actions [centroid–centroid distance = 3.681 (1) Å].