ACTA CRYSTALLOGRAPHICA SECTION E-CRYSTALLOGRAPHIC COMMUNICATIONS, vol.64, 2008 (SCI-Expanded)
The title compound, C27H22N2O4, contains a nearly planar four-membered beta-lactam ring, which makes dihedral angles of 74.64 (12), 1.70 (11) and 73.67 (12)degrees with the nine-membered ring system, the benzene ring and the phenyl ring, respectively. The crystal structure is stabilized by C-H center dot center dot center dot O and C-H center dot center dot center dot pi interactions and a pi-pi interaction [centroid-centroid distance = 3.4505 (19) angstrom] is also present.