6-methyl-3-nitroso-2-phenylimidazo[1,2-a]pyridine

3-nitroso-2,6-diphenyl-5H-imidazo[1,2-b]pyrazole

(2Z)-2-hydroxyimino-1-phenyl-2-pyridin-1-ium-1-ylethanone,bromide

(7-nitro-2H-1,2,4-benzoxadiazin-3-yl)-phenylmethanone