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In the title compound, C 16 H 9 F 4 N 3 O 2 , the dihedral angle between the aromatic ring systems is 4.10 (14)° and a bifurcated intra­molecular N—H⋯(O,F) hydrogen bond generates an  S (6) ring for the O-atom acceptor and an  S (5) ring for the F-atom acceptor. A short C—H⋯O conact also occurs. In the crystal, mol­ecules are linked by C—H⋯O inter­actions.

1-Acetyl-3-[2-(2,3,5,6-tetrafluorophenyl)hydrazin-1-ylidene]indolin-2-one