13-Nitro-2-oxa-9-azatricyclo[9.4.0.0^{3,8}]pentadeca-1(15),3(8),4,6,11,13-hexaen-10-one 1g

13-Nitro-2-oxa-9-azatricyclo[9.4.0.0^{3,8}]pentadeca-1(15),3(8),4,6,11,13-hexaen-10-one 1g