8,15-Dioxa-10,13-di-aza-tetra-cyclo-[14.4.0.0(2,7).0(9,14)]icosa-1(16),2,4,6,9(14),10,12,17,19-nona-ene.

The asymmetric unit of the title compound, C16H10N2O2, contains one half-mol-ecule, the complete mol-ecule being generated by twofold rotation symmetry. The plane of the pyrazine ring forms a dihedral angle of 64.87†(6)° with that of the benzene ring, and the planes of the two benzene rings are inclined to one another by 54.20†(6)°. The O atom deviates from the plane of the benzene ring by 0.1549†(8)†à . There are no significant inter-molecular inter-actions in the crystal.