(2-tert-Butyl-3-phenyl-2,3-di-hydro-isoxazole-4,5-di-yl)bis-(phenyl-methanone).

The phenyl and tert-butyl groups of the title compound, C27H25NO3, exhibit a trans configuration in agreement with the stereochemistry of the Z phenyl-N-tert-butyl-nitrone starting material. The attached carbonyl groups are not coplanar with the neighboring di-hydro-isoxazole ring and the phenyl rings they are bonded to, with torsion angles of 59.26 (8), 17.53 (11), 16.52 (12) and 52.86 (7)°. The dihedral angle between the di-hydro-isoxazole ring and the directly attached phenyl group is 86.86 (8)°. There are two nonclassical inter-molecular C-H⋯O hydrogen-bonding inter-actions that operate together with an inter-molecular C-H⋯π inter-action to form a supramolecular architecture in the crystal system.