2-Hydroxy-16-[(<i>E</i>)-4-hydroxy-3-methoxybenzylidene]-13-(4-hydroxy-3-methoxyphenyl)-11-methyl-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