rac-(3S,4S)-3-Hy-droxy-4-phenyl-1-[(S)-(3-phenyl-4,5-dihydro-1,2-oxazol-5-yl)meth-yl]-4,5-dihydro-1H-1,5-benzo-diazepin-2(3H)-one.

In the title compound, C(25)H(23)N(3)O(3), the seven-membered diazepine ring adopts a boat conformation with the hydroxy-substituted C atom at the prow and fused-ring C atoms at the stern. The crystal packing features C-H⋯O, C-H⋯π and N-H ⋯π inter-actions.