Registre de correu electrònic: 5-[(E)-Benzyl­idene]-2-hy­droxy-8,9-di­phenyl-3,10-diaza­hexa­cyclo­[10.7.1.1(3,7).0(2,11).0(7,11).0(16,20)]henicosa-1(19),12(20),13,15,17-pentaen-6-one