Acta Cryst. (2013). E69, o662 [ doi:10.1107/S1600536813008702 ]
Abstract: The dihydroquinoxaline ring system of the title molecule, C19H17N3O3, is approximately planar [maximum deviation = 0.050 (2) Å], the dihedral angle between the planes through the two fused rings being 4.75 (8)°. The mean plane through the fused-ring system forms a dihedral angle of 30.72 (5)° with the attached phenyl ring. The molecular conformation is enforced by C-HO hydrogen bonds. In the crystal, molecules are linked by weak C-HO hydrogen bonds, forming a three-dimensional network.
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