Bis(4-fluoro-3-nitrophenyl) sulphone4,4'-Difluoro-3,3'-dinitrodiphenylsulphone4,4'-DIFLUORO-3,3'-DINITRODIPHENYL SULFONE4,4′-二氟-3,3′-二硝基二苯砜4,4′-Difluoro-3,3′-dinitrodiphenyl sulfone双(4-氟-3-硝基苯)砜4-氟-3-硝基苯砜Bis(4-fluoro-3-nitrophenyl) sulfone4,4'-Difluoro-3,3'-dinitrodiphenyl sulfone4-Fluoro-3-nitrophenyl sulfone