2-(4'-nitrophenyl)-3-nitrosoimidazo[1,2-a]pyridine
2-(4-Nitro-phenyl)-3-nitroso-imidazo[1,2-a]pyrimidine
2-(4-Nitro-phenyl)-3-nitroso-imidazo[1,2-a]pyrazine
6-Methyl-2-(4-nitro-phenyl)-3-nitroso-imidazo[1,2-a]pyridine
(4-Nitro-phenyl)-(5H-[1,2,4]triazolo[4,3-b][1,2,4]triazol-3-yl)-methanone