Enviar Registro por Correo electrónico: 4′-Methyl-14′,19′-dioxa-4′-aza­spiro­[acenaphthyl­ene-1,5′-tetra­cyclo­[18.4.0.0(2,6).0(8,13)]tetra­cosa­ne]-1′(24′),8′,10′,12′,20′,22′-hexa­ene-2,7′(1H)-dione