5-Hydroxy-2-nitro-4-(trifluoromethoxy)pyridine
3-(Difluoromethyl)-4-methoxy-5-nitropyridine-2-sulfonyl chloride
3-(Trifluoromethoxy)-2,4,5-triiodopyridine
6-(Chloromethyl)-2-(difluoromethyl)-3-hydroxy-4-(trifluoromethyl)pyridine
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