Ethyl 6-(difluoromethyl)-3-nitro-4-(trifluoromethoxy)pyridine-2-carboxylate
3-(Difluoromethyl)-6-fluoro-2-hydroxy-5-(trifluoromethyl)pyridine
2-(Chloromethyl)-3-(difluoromethyl)-5-fluoropyridine
3-(Difluoromethyl)-6-hydroxy-2-methylpyridine-5-carbonyl chloride