12-Oxa-2,3,5,7-tetraazatricyclo[7.4.0.0,2,6]trideca-1(9),3,5,7-tetraen-13-one 1g

12-Oxa-2,3,5,7-tetraazatricyclo[7.4.0.0,2,6]trideca-1(9),3,5,7-tetraen-13-one 1g