16-[(<i>E</i>)-Benzylidene]-2-hydroxy-12,13-diphenyl-1,11-diazapentacyclo[12.3.1.0<sup>2,10</sup>.0<sup>3,8</sup>.0<sup>10,14</sup>]octadeca-3(8),4,6-triene-9,15-dione
Acta crystallographica. Section E