7,11-Dinitro-3-oxatricyclo[7.3.1.0,5,13]trideca-1(13),5,7,9,11-pentaene-2,4-dione 1g

7,11-Dinitro-3-oxatricyclo[7.3.1.0,5,13]trideca-1(13),5,7,9,11-pentaene-2,4-dione 1g