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In the crystal structure of the title compound, C 18 H 11 FN 4 , the pyridopyrazine system makes dihedral angles of 45.51 (7) and 44.75 (7)° with the attached 4-fluoro­phenyl ring and the pyridine ring, respectively. The 4-fluoro­phenyl ring makes a dihedral angle of 54.54 (8)° with the pyridine ring. The pyridine ring part of the pyridopyrazine ring and the pyrazine ring of two  c -glide-plane-related mol­ecules form π–π inter­actions. The angle between the planes is 2.09 (7)° and the distance between the centroids is 3.557 (1)Å.

2-(4-Fluorophenyl)-3-(4-pyridyl)pyrido[2,3-b]pyrazine