cis-6-Phenyl-4bH,6H,11H,13H-isoindolo[1,2-c]benz[2,4]oxazepin-13-one.

The title compound, C22H17NO2, contains an isoindolinone moiety joined to a phenyl-substituted benzoxazepine ring. The isoindolinone moiety is essentially planar and the oxazepine ring adopts a distorted chair conformation, with the phenyl substituent equatorial. Owing to the severe puckering of the central oxazepine ring, the molecule as a whole is non-planar; the benzene ring of the benzoxazepine fragment makes an angle of 67.7 (1) degrees with respect to the isoindoline ring.