Methyl 2-(difluoromethyl)-3-hydroxy-4-nitropyridine-6-carboxylate
Methyl 2-(bromomethyl)-5-(difluoromethyl)-4-methoxypyridine-3-carboxylate
4,6-Dihydroxy-3-(trifluoromethoxy)pyridine-2-carbonyl chloride
4-(Difluoromethyl)-5-fluoro-3-methylpyridine-2-carbonyl chloride