7-Chloro-4-iodo-1H-pyrrolo[2,3-c]pyridine
8-Bromo-5-methoxypyrido[3,4-b]pyrazine
7-Bromo-[1,2,5]thiadiazolo[3,4-c]pyridin-4(5h)-one
2-Nitro-1-(pyridin-4-yl)ethanol
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