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Acta Cryst. (2005). E61, o4206-o4208 [ doi:10.1107/S1600536805037621 ]
Abstract: In the title compound, C17H16N4O4, the dihedral angle between the planar nine-membered bicyclic ring system and the benzene ring is 81.9 (1)°. Intramolecular N-H
O and intermolecular N-H
O, N-H
N and C-H
N hydrogen bonds are effective in stabilizing the molecular and crystal structure.
Online 23 November 2005
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