16-[(<i>E</i>)-Benzylidene]-13-hydroxy-4-methyl-2-phenyl-4,14-diazapentacyclo-[12.3.1.0<sup>1,5</sup>.0<sup>5,13</sup>.0<sup>7,12</sup>]octadeca-7(12),8,10-triene-6,17-dione
Acta crystallographica. Section E