6-Chloro-3-nitro-1H-pyrrolo[3,2-b]pyridine
4-Chloro-3-fluoro-1H-pyrrolo[3,2-c]pyridine
2-Bromo-1-(5-fluoropyridin-2-yl)ethanone
2-Bromo-4,5,6,7-tetrahydrothieno[3,2-c]pyridine
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