6-Bromo-5-chloro-1H-imidazo[4,5-b]pyridin-2(3H)-one
1-(4-Amino-2-bromopyridin-3-yl)ethanone
1-(6-Chloro-5-nitropyridin-3-yl)ethanone
1-(Thieno[2,3-b]pyridin-2-yl)ethanone
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