1H-imidazole-1-sulfonyl fluoride, 5-chloro-4-nitro- 5-chloro-4-nitro-1H-imidazole-1-sulfonyl fluoride InChI=1/C3HClFN3O4S/c4-2-3(8(9)10)6-1-7(2)13(5,11)12/h1