Acta Cryst. (2006). E62, o804-o806 [ doi:10.1107/S1600536806002595 ]
Abstract: The title compound, C31H26N2O5, is a compound with a spiro junction between
-lactam and isatin ring systems. Its four- and five-membered rings are nearly planar, with maximum deviations of -0.020 (1) and 0.050 (1) Å for their carbonyl C atoms, respectively. The dihedral angle between these two rings is 86.44 (5)°. The crystal structure is stabilized by intramolecular C-H
O hydrogen-bonding and van der Waals interactions.
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