4-(Difluoromethyl)-3-fluoro-2-methylpyridine-6-sulfonyl chloride
3-Amino-2-(chloromethyl)-4-(difluoromethyl)-6-nitropyridine
6-Fluoro-2-(trifluoromethoxy)pyridine-3-sulfonyl chloride
4-Bromo-3-fluoro-2-mercaptopyridine
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