Acta Cryst. (2012). E68, o969 [ doi:10.1107/S1600536812009166 ]
Abstract: The title compound, C21H23N3O, exists in an enamine-keto form with the amino group involved in an intramolecular N-HO hydrogen bond. The dihedral angle between the phenyl rings is 73.59 (6)°. The five-membered ring is nearly planar, the largest deviation being 0.0004 (7) Å, and makes dihedral angles of 4.81 (6) and 69.81 (5)° wth the phenyl rings. In the crystal, pairs of weak C-HO interactions link the molecules into centrosymmetric dimers.
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