7′-(Naphthalen-1-yl)-5′′-[(naphthalen-2-yl)methylidene]-1′,3′,5′,6′,7′,7a′-hexahydrodispiro[acenaphthene-1,5′-pyrrolo[1,2-<i>c</i>]thiazole-6′,3′′-piperidine]-2(1<i>H</i>),4′′-dione
Acta crystallographica. Section E